Search

Background: The present study aims to evaluate a three-dimensional (3D) changes in the crestal bone levels (buccally, lingually/palatally, mesially, and distally) and in the thickness of keratinized tissue around single or multiple implants using cone-beam computed tomography (CBCT) after 1 year. Materials and Methods: Twenty-eight implants were placed in the posterior load-bearing areas in 10 patients. The crestal bone levels and the thickness of keratinized tissue surrounding the edentulous area were assessed preoperatively, immediately after implant placement, and 1 year after implant placement using CBCT (3D imaging technique with DICOM software (Carestream Health, Rochester, NY)). Implant stability quotient (ISQ) was measured immediately after implant placement using resonance frequency analysis (RFA) (Penguin RFA Monitor Osseointegration, Integration Diagnostics Sweden AB, Furstenbergsgatan 4 416 64 Göteborg, Sweden). Results: The average crestal bone loss around the implants after 1 year was 0.78 ± 0.26 mm on the buccal side, 0.63 ± 0.27 mm on the lingual side, 0.57 ± 0.18 mm on the mesial side, and 0.53 ± 0.28 mm on the distal side. The average amount of bone loss including all sites was 0.63 ± 0.17 mm and the mean change in keratinized tissue thickness after 1 year was 0.3 ± 0.19 mm. The RFA ranged from 75 to 82 Nm for all the implants immediately after placement. Conclusion: CBCT can be used as a reliable source, as it is compararively more superior and precise than intraoral periapical radiographs in measuring the changes in the bone and thickness of the keratinized tissue before and after implant placement. A thick biotype of the keratinized tissue is as important as the bone topography for the success of the implant. ISQ measurements immediately after implant placement can also act as a major factor in depicting the success of the implant in the future.

Background: The present study aims to evaluate a three-dimensional (3D) changes in the crestal bone levels (buccally, lingually/palatally, mesially, and distally) and in the thickness of keratinized tissue around single or multiple implants using cone-beam computed tomography (CBCT) after 1 year. Materials and Methods: Twenty-eight implants were placed in the posterior load-bearing areas in 10 patients. The crestal bone levels and the thickness of keratinized tissue surrounding the edentulous area were assessed preoperatively, immediately after implant placement, and 1 year after implant placement using CBCT (3D imaging technique with DICOM software (Carestream Health, Rochester, NY)). Implant stability quotient (ISQ) was measured immediately after implant placement using resonance frequency analysis (RFA) (Penguin RFA Monitor Osseointegration, Integration Diagnostics Sweden AB, Furstenbergsgatan 4 416 64 Göteborg, Sweden). Results: The average crestal bone loss around the implants after 1 year was 0.78 ± 0.26 mm on the buccal side, 0.63 ± 0.27 mm on the lingual side, 0.57 ± 0.18 mm on the mesial side, and 0.53 ± 0.28 mm on the distal side. The average amount of bone loss including all sites was 0.63 ± 0.17 mm and the mean change in keratinized tissue thickness after 1 year was 0.3 ± 0.19 mm. The RFA ranged from 75 to 82 Nm for all the implants immediately after placement. Conclusion: CBCT can be used as a reliable source, as it is compararively more superior and precise than intraoral periapical radiographs in measuring the changes in the bone and thickness of the keratinized tissue before and after implant placement. A thick biotype of the keratinized tissue is as important as the bone topography for the success of the implant. ISQ measurements immediately after implant placement can also act as a major factor in depicting the success of the implant in the future. [ABSTRACT FROM AUTHOR]

Purpose: Immediate dental implants revolutionized the field of implant dentistry with significant advantages over conventional implants. The lack of adequate bone in the extraction socket raises the question of the appropriate timing of implant loading. Platelet concentrates have been used widely to accelerate bone regeneration in the maxillofacial region. This study evaluates the effect of platelet concentrates on bone healing and implant stability in the maxillary and mandibular molar regions. Bone regeneration is regulated by several growth factors, particularly vascular endothelial growth factor (VEGF) and transforming growth factor-ß1 (TGF-ß1); therefore, quantification of these factors in platelet concentrates and its correlation with bone healing has been assessed in this study. Materials and Methods: The primary aim of this randomized clinical trial was to compare the stability of immediate dental implants in the maxillary and mandibular molar regions treated with platelet-rich fibrin (PRF) versus concentrated growth factors (CGF) using resonance frequency analysis (RFA). The secondary objectives were to evaluate the bone regenerate around implants with the use of PRF and CGF and to quantify growth factors VEGF and TGF-ß1 in the prepared CGF and PRF and their correlation with bone healing, if any. A total of 36 patients were randomized into three groups (12 each): control, PRF, and CGF. In all patients, immediate implants were placed either with or without platelet concentrate (PRF or CGF). Implant stability was measured using RFA immediately postoperatively and at 4, 8, and 12 or 16 weeks (12 weeks for mandible and 16 weeks for maxilla) postoperatively. Radiodensity and the bone gap (horizontal/vertical) were measured on intraoral periapical radiographs immediately postoperatively and at 8 weeks and 12 or 16 weeks postoperatively. Results: On comparing the implant stability quotient (ISQ), radiodensity/grayscale (GS), and horizontal and vertical bone gap (HG and VG), there was no significant difference noted between the three groups at any point in time. On ISQ analysis at 8 weeks, the control group showed a significant improvement (P = .04), whereas at 12 or 16 weeks, significant improvement was seen in PRF (P = .03) and CGF groups (P = .02). In GS assessment, only the control group showed significant improvement at 12 or 16 weeks (P = .009). In horizontal and vertical bone gap analysis all three groups showed significant improvement at 8 weeks (control [P < .001], PRF [P = .001], CGF [P = .01]) as well as 12 or 16 weeks (control [P < .001], PRF [P < .001], CGF [P = .006]). The enzyme-linked immunosorbent assay (ELISA) quantification of VEGF and TGF-ß1 showed significant concentration of VEGF in PRF as compared to the plasma, while concentration of TGF-ß1 was found to be comparable in both groups. Conclusion: The application of platelet concentrates seems to enhance stability of implants, but intergroup results were nonsignificant at all time points. There was no statistically significant difference between the three groups when comparing quality (radiodensity/grayscale) and quantity (horizontal and vertical gap reduction) of bone regenerate. Studies with larger sample sizes are required to make conclusive assertions regarding efficacy of platelet concentrates in dental implants. [ABSTRACT FROM AUTHOR]

Alveolar bone quality at the implantation site affects the initial stability of dental implant treatment. However, the relationship between bone quality and osseointegration has yet to be evaluated. Herein, we aimed to investigate the effect of bone quality on dental implant stability in osseointegration formation changes. Patients underwent computed tomography imaging before dental implantation at the posterior. Hounsfield units were measured at the platform, middle, and tip sites. Implant stability was measured using resonance frequency analysis immediately and at 3 months postoperatively, in which the difference in implant stability quotients (ISQ) was defined as the change between primary and secondary fixation. In multiple regression analysis, the dependent variable was the change between the immediate and secondary fixations. We included 81 implants that conformed to the criteria. Primary fixation yielded the following results: R2 = 0.117, F = 2.529, and P =.047. The difference between the maxilla and mandible of the implantation site (P =.02) and the platform-site Hounsfield units (P =.019) were identified as significant factors. The following results were obtained regarding the change between the immediate and secondary fixation: R2 = 0.714, F = 40.964, and P <.001. The difference between diameter (P =.008) and the immediate ISQ (P <.001) were identified as significant factors. Overall, the bone quality of the implantation site affected initial fixation; however, it had limited effect on secondary fixation. Our findings clarified the period where bone quality affects dental implant treatment and is expected to advance dental implant treatment. [ABSTRACT FROM AUTHOR]

Purpose: The purpose of this study was to determine the minimum torque required to attach the transducer to the implant to measure the implant stability quotient (ISQ) with two different devices and to estimate if finger-generated torque would be reliable for this purpose. Materials and Methods: One hundred implants were inserted into a uniform polyurethane block. The implants were distributed into 10 groups, with 10 implants each. The transducers were manually attached by a female operator (G female) and by a male operator (G male) using the standard connector provided by the manufacturers. For the remaining groups, the transducers were placed using a connector adapted to a digital torque wrench with different torque settings: 3 Ncm (G 3Ncm), 4 Ncm (G 4Ncm), 5 Ncm (G 5Ncm), 6 Ncm (G 6Ncm), 10 Ncm (G 10Ncm), 13 Ncm (G 13Ncm), 17 Ncm (G 17Ncm), and 20 Ncm (G 20Ncm). The stability was measured for all groups using both the Osstell and the Penguin resonance frequency analyzers. The minimum, medium, and maximum finger grip torque were accessed on 100 volunteers. Results: For Osstell, the conjugated confidence intervals were homogenous for four groups (G 10Ncm, G 13Ncm, G 17Ncm, and G 20Ncm), and for Penguin, they were homogenous for six groups (G 5Ncm, G 6Ncm, G 10Ncm, G 13Ncm, G 17Ncm, and G 20Ncm). The minimum finger-generated force was 2.18 ± 1.05 Ncm, the medium force was 4.25 ± 1.57 Ncm, and the maximum force was 7.51 ± 2.52 Ncm, measuring with a digital torque meter. Conclusion: For an accurate measurement of ISQ, the minimum torque necessary to insert the transducer into the implant for Osstell was 10 Ncm, while for Penguin, it was 5 Ncm. Therefore, when using Osstell to assess implant stability, the authors suggest the use of a torque wrench to ensure 10 Ncm of force is applied when tightening the transducer into the implant to obtain accurate stability measurements. When using Penguin, the maximum finger-generated tightening force is enough. [ABSTRACT FROM AUTHOR]

Purpose: To assess the effects of drilling protocol and bone density on the primary stability of implants with different macrogeometries currently used in clinical practice. Materials and Methods: This in vitro study compared the designs of two implants: Biomimetic Coral, a parallel-walled design with a slightly expanded platform and a symmetric progressive thread; and tapered Biomimetic Ocean, a reverse coronal design with an asymmetric progressive thread. The drilling alternatives were grouped according to the standard sequence for each type, plus an extra drill for hard bone, using laminated blocks with different densities. The insertion torques and implant stability quotient (ISQ) values were obtained with a surgical motor and resonance frequency analysis (RFA), respectively. Results: A total of 120 implants (n = 60 Ocean, n = 60 Coral) were inserted and analyzed without registering any deviation from the protocol. The Coral implants presented significantly higher insertion torque values (P < .001), consistent with optimal osseointegration, for the standard drill, the dense bone drill, and the screw tap. Insertion torque was not affected by the drilling sequence (P = .124), and the effect of interaction between the implant design and drilling sequence was not significant (P = .940). Statistically significant differences were observed in insertion torque values due to the type of implant but not due to the bone density. The ISQ values were significantly higher (P < .001) for the Coral design. In both the Ocean and Coral implants, ISQ was affected by the drilling sequence (P < .001), as the ISQ values were higher in the standard sequence with screw tap drilling than in the standard sequence with a dense bone drill. A positive correlation was found between the insertion torque and ISQ values. Conclusion: The macrogeometry of the implant and the drilling sequence have a significant effect on both primary stability values (ISQ and insertion torque). The values for the Coral implant were statistically higher but still within the range required to achieve proper osseointegration. These results support the drilling sequence recommended by the manufacturer for this type of implant, using larger-diameter drills and screw taps in sites with harder or cortical bone. [ABSTRACT FROM AUTHOR]

Primary implant stability (PIS) is known to vary with recipient bone mass and density, dental implant design and surgical technique. The objective of this preliminary study was to compare rotational and lateral PIS of same-coronal-diameter conical and parallel implants, using insertion torque recorded with a dental implant motor set and implant stability quotient obtained from resonance frequency analysis (performed with both Osstell and Penguin systems) as measures of rotational and lateral stability, respectively. Additionally, the relationship between PIS and alveolar ridge width (ARW) was explored in both implant types. Sixty dental implants (30 tapered and 30 parallel) were randomly placed with a split-mouth design in 17 patients. Bone density and ARW were estimated from cone beam computed tomography images taken with radiological-surgical templates. Density and width values were similar in the 2 groups (P >.05). Implant coronal diameters were 3.75 mm in all cases, while consistent with the manufacturer's recommendations, final drill bit diameters used were 3.25 and 3.4 mm for parallel and tapered implants, respectively. Insertion torque was higher (P <.05) with parallel implants, but between-group differences in implant stability quotient were not significant (P >.05). In tapered implants, insertion torque was inversely correlated with ARW (P <.001). Notably, significant differences were observed between resonance frequency analysis values from Osstell and Penguin systems (P <.001). In conclusion, future studies should explore how PIS may be influenced by final drill bit size regardless of implant design and potential limits on the effectiveness of tapered implants to achieve good stability in thick low-density bone. [ABSTRACT FROM AUTHOR]

Combining tooth extraction and implant placement reduces the number of surgical procedures that a patient must undergo. Thus, the present study aimed to compare the stability of two types of conical implants (TAC and INTRALOCK) and another cylindrical one (CYROTH), inserted with a range of angulation of 15–20 degrees in low-density polyurethane blocks (10 and 20 pounds per cubic foot, PCF) with or without a cortical lamina (30 PCF), which potentially mimicked the post-extraction in vivo condition. For this purpose, a total of 120 polyurethane sites were prepared (10 for each implant and condition) and the Insertion Torque (IT), Removal Torque (RT), and Resonance Frequency Analysis (RFA) were measured, following a Three-Way analysis of variance followed by Tukey's post hoc test for the statistical analysis of data. The IT and RT values registered for all implant types were directly proportional to the polyurethane density. The highest IT was registered by INTRALOCK implants in the highest-density block (32.44 ± 3.28 Ncm). In contrast, the highest RFA, a well-known index of Implant Stability Quotient (ISQ), was shown by TAC implants in all clinical situations (up to 63 ISQ in the 20 PCF block without the cortical sheet), especially in lower-density blocks. Although more pre-clinical and clinical studies are required, these results show a better primary stability of TAC conical implants in all tested densities of this post-extraction model, with a higher ISQ, despite their IT. [ABSTRACT FROM AUTHOR]

In the placement of dental implants, the primary fixation between the dental implant and the bone is of great importance and corresponds to compressive mechanical fixation that aims to prevent micromovement of the implant. The aim of this research was to determine the role of roughness and the type of dental implant (tissue-level or bone-level) in implant stability, measured using resonance frequency analysis (RFA) and insertion torque (IT). We analyzed 234 titanium dental implants, placed in fresh calf ribs, at the half-tissue level and half-bone level. The implant surface was subjected to grit-blasting treatments with alumina particles of 120, 300, and 600 μm at a projection pressure of 2.5 bar, resulting in three types of roughness. Roughness was determined via optical interferometry. The wettability of the surfaces was also determined. Implant stability was measured using a high-precision torquemeter to obtain IT, and RFA was used to determine the implant stability quotient (ISQ). The results show that rough surfaces with Sa values of 0.5 to 4 μm do not affect the primary stability. However, the type of implant is important; bone-level implants obtained the highest primary stability values. A good correlation between the primary stability values obtained via IT and ISQ was demonstrated. New in vivo studies are necessary to know whether these results can be maintained in the long term. [ABSTRACT FROM AUTHOR]

Copyright of Revista Española de Cirugía Oral y Maxilofacial is the property of Sociedad Espanola de Cirugia Oral y Maxilofacial (SECOM) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Different strategies are known to improve implant primary stability (PS) and the bone-to-implant contact in post-extractive conditions, such as the macro-geometry of screws and apical threads, which can enhance the mechanical characteristics. In any case, the role of the apical area design in maintaining or improving the PS, especially in low-quality bone, still remains unclear. Thus, the present study aimed at evaluating in vitro the Insertion Torque (IT), Removal Torque (RT), and Resonance Frequency Analysis (RFA) of different implant apical threads in a cylindrical (EE) and in three conical implants (T3, TAC, Intra-lock) inserted in simulated post-extraction conditions on low-density polyurethane foams of 10 and 20 pounds per cubic foot (PCF), with and without the addition of a cortical sheet of 30 PCF in density. The IT, RT, and RFA values of all the implants tested were directly proportional to the polyurethane density and to the presence of the cortical sheet, but TAC and Intra-lock implants, which had the latest-generation thread design, always showed significantly higher values (e.g., IT: 18.6 and 18.6 Ncm, RT: 10.8 and 13.7 Ncm, RFA mean: 46 and 43 ISQ, in the 20 PCF density with the cortical sheet for TAC and Intra-lock, respectively). In particular, TAC implants also reached the highest RFA values in the lowest-density foam (19 ISQ). In conclusion, the present in vitro study demonstrated that TAC and Intra-lock apical designs and macro-geometries could play a key role in determining the PS and the polyurethane-implant contact in simulated post-extraction conditions in low-density artificial bone. [ABSTRACT FROM AUTHOR]

Purpose: To investigate the implant stability quotient (ISQ) values of implants placed in bone with and without dehiscence bone defects over 12 weeks and to compare the ISQ values between the two groups. Materials and Methods: Twenty-two patients with an edentulous area at the posterior mandible were enrolled. Thirty OsseoSpeed EV Astra Tech implants (Dentsply Sirona), 4.2 mm in diameter, were placed. Twenty implants were placed without bone regeneration (no dehiscence group), while 10 presented with favorable bone defects and received simultaneous guided bone regeneration with dental implant placement (dehiscence group). At the time of implant placement, 2, 4, 8, and 12 weeks, resonance frequency analysis was utilized. The changes in ISQ values within group were analyzed with repeated-measures analysis of variance (ANOVA), and the mean ISQ values between the no dehiscence and dehiscence groups were compared using unpaired t tests. Results: All implants were successfully integrated without complication. The no dehiscence group demonstrated mean ISQ values of 74.30 ± 6.01, 69.58 ± 5.30, 71.10 ± 5.80, 75.08 ± 3.93, and 77.85 ± 3.18 at baseline, 2, 4, 8, and 12 weeks, respectively. The dehiscence group demonstrated mean ISQ values of 69.85 ± 7.00, 63.40 ± 8.47, 59.90 ± 10.23, 72.55 ± 3.10, and 76.20 ± 2.68 at baseline, 2, 4, 8, and 12 weeks, respectively. The dehiscence group showed significantly lower mean ISQ values at 2 weeks (P = .021) and at 4 weeks (P = .007) after implant placement compared with those of the no dehiscence group. Conclusion: Within the 12-week healing period, all implants demonstrated successful osseointegration and achieved stability in favorable bone defects. Nevertheless, clinicians should consider that significantly lower implant stability can occur in the first month. [ABSTRACT FROM AUTHOR]

Purpose: The purpose of this study was to analyze the implant stability quotient (ISQ) values recorded by three commercially available resonance frequency analysis (RFA) instruments from a large cohort of implants in order to determine their accuracy and agreement with one another both for static measurements of ISQ at a given time and for change in ISQ over time. Materials and Methods: A cohort of n = 210 implants had their primary stability, secondary stability, or both evaluated in both the mesiodistal (MD) and buccolingual (BL) directions by means of ISQ using three different RFA instruments: Osstell ISQ (OISQ), Osstell IDx (OIDX), and the Penguin (PG). ISQ values were recorded both at the time of implant placement and at 3 months postinsertion prior to definitive restoration. All values were tabulated for a blinded statistical analysis using Bland- Altman plots to determine if the outcome values were in agreement both for primary and secondary stability. In addition, a subgroup was evaluated to determine if change in ISQ was also in agreement. An intraclass correlation (ICC) was used to measure the reliability of the measurements for each instrument. Results: Bland-Altman plots confirmed that there was a high agreement for MD values between OISQ and OIDX, with 72.7% of readings being within one ISQ unit and 94.7% within four units. Comparing PG to OISQ, the respective values at one and four units were 15.3% and 82.3%, and comparing PG to OIDX, the respective values were 16.3% and 85.2%. In general, there was a greater uncertainty in the BL values having wider variability and demonstrating less agreement between instruments, with the percentage of readings falling within four units reducing to 85.9% (OISQ vs OIDX), 72.3% (PG vs OISQ), and 74.3% (PG vs OIDX). For change in ISQ over time, 92.3% of values were in agreement to within four units between instruments OISQ and OIDX in the MD direction and 73% in the BL direction. The respective percentage changes of values in agreement within four units for PG vs OISQ were 76.9% and 60.3% and for PG vs OIDX were 80% and 53.8%. The paired t test from mixed effects revealed that there was a significant difference for mean MD values between PG vs OISQ; P = .015 with a mean 0.823 units higher was recorded for PG. Similarly for PG vs OIDX, P = .008 with a mean 0.871 units higher was recorded for PG. For mean BL values between PG vs OIDX, P = .000 with a mean 1.161 units higher was recorded for PG, and finally, for OISQ vs OIDX, P = .005 with a mean 0.597 units higher was recorded for OISQ. However, the maximum upper and lower bound estimated bias between any two instruments was only 1.86 units and 0.46 units both for PG vs OIDX in the BL direction, and it is doubtful that this is of clinical relevance even if statistically significant. ICC revealed that for static MD measurements, there was an 85% reliability between all three instruments (range: 79% to 97%). For BL measurements, the reliability value was 66% (range: 69% to 71%). When considering ICC for changes in ISQ values over time in the MD direction, there was a 70% reliability between all three instruments (range: 58% to 94%). For BL measurements, the reliability value was 58% (range: 46% to 91%). Conclusion: Differences exist between instruments to some extent, most notably between the Penguin and the two instruments from Osstell, which showed good agreement to each other. While differences in evaluating ISQ with the PG were statistically significant, they were less than 1.86 units at the upper bound limit, and it is doubtful that this is of clinical relevance. Increased variability and reduced reliability for BL values render these less clinically sound when trying to assess primary stability. [ABSTRACT FROM AUTHOR]

This prospective study compared the stability of implants placed using piezoelectric surgery (piezo group) and those placed using conventional rotary drills (bur group) during the first 90 days postoperatively. Teeth in the posterior maxillary regions of 21 patients were randomly assigned to 2 groups. The implant stability quotient (ISQ) was measured at days 0, 7, 14, 21, 28, 42, 56, and 90 postoperatively. Twenty-eight of 29 implants were successfully integrated at day 90 (1 implant in the test group was lost). Although both groups showed a significant overall increase in implant stability with time (P <.0001) and a high final mean ISQ value, no statistically significant difference in stability was seen between the groups. The bur group showed greater variance in ISQ values than the piezo group did (P <.001) at all time points. Long-term studies with larger samples are needed to investigate the bone response to the use of piezoelectric surgery for implant preparation. [ABSTRACT FROM AUTHOR]

CONCLUSION Independent of implant design and surgical technique, high implant and abutment survival rates were observed for patients implanted with both the 3.75-mm-wide implant and the 4.5-mm-wide implant. Outcomes comprised implant stability, implant survival, soft tissue status, skin height and revision surgery. Prospective 5 year outcomes of different implant designs and surgical techniques in 68 patients with bone anchored hearing implants Keywords: bone conduction; bone-anchored hearing; hearing loss; implant stability quotient; tissue preservation; wide diameter implant EN bone conduction bone-anchored hearing hearing loss implant stability quotient tissue preservation wide diameter implant 65 69 5 12/16/22 20230101 NES 230101 Key Points Both the 4.5-mm-wide implant and the 3.75-mm-wide implant have excellent survival rates at 5-year follow-up. [Extracted from the article]

IntroductionThe aim of this study was to evaluate the influence of different implant morphologies and immediate provisionalization options on the change of implant stability.Methods94 Patients were randomized to receive implants from Straumann® BL/Straumann® BLT/Astra OsseoSpeed® TX, meanwhile having the same opportunity to receive healing abutment or immediate provisionalization. Implant stability quotient (ISQ) and marginal bone loss (MBL) were recorded at following timepoints. Parametric statistic was used for data analysis.ResultsData showed that ISQ and MBL values of conical/straight/straight with micro-thread neck implants had no significant difference.DiscussionImmediate provisionalization options could move the dip point of ISQ values ahead or delayed around one week, which were also relevant to implant systems. MBL values were proved to be unaffected by both two factors mentioned above.

Objectives: Fractal analysis is a mathematical method used for the calculation of bone trabeculation and lacunarity. This study aims to evaluate the relationship between resonance frequency analysis (RFA) and fractal dimension (FD) of peri-implant bone to determine the preload stability of implants. Materials and methods: In this study, the results of the fractal analysis calculated from the resonance frequency analysis results taken in the 3rd month of the patients who underwent 2-stage implant by the same doctor and the radiographs taken in the same session were evaluated. A hundred implants in 20 patients were applied in this study. The implant stability quotient (ISQ) values of the implants and fractal dimension values of the peri-implant bone were calculated. Results: The findings showed that the ISQ1 (p = 0.008), ISQ2 (p = 0.038), ROI2 (p = 0.013), and ROI3 (p < 0.001) values were statistically significantly higher in men than women. The ISQ1 (p = 0.003), ISQ2 (p = 0.013), ROI1 (p = 0.011), and ROI3 (p < 0.001) of the mandible were statistically higher than the maxilla. The fractal dimension cut-off value to assess prosthetic loading was found 1.198. Conclusion: Fractal analysis is a non-invasive method that can be used in conjunction with clinical examination in the prosthetic loading decision of implants. It is a valuable parameter that can be used without the need for an extra device when it is necessary to reduce the clinical study time. Clinical relevance: Calculating the fractal dimension of the peri-implant bone is a practical, economical, and applicable method for clinicians. FD calculated from panoramic radiographs used for diagnosis in routine treatments in clinics where access to the necessary devices for ISQ measurement is not available will contribute to clinical practice. [ABSTRACT FROM AUTHOR]

Purpose: The aim of this in vivo study is to compare the variation in implant stability quotient (ISQ) values of implants using resonance frequency analysis (RFA) to access the immediately loaded (within 24 h) implants at different time intervals using Penguin RFA system. Materials and Methods: Ten Nobel Replace Tapered RP implants were placed in posterior mandible region of patients. Patients were included in the study after fulfilling the inclusion criteria. Prior to enrolling in the study, thorough information about the procedure was provided to the patients, and written consent was obtained for the same. Immediate loading was done within 24 h using tooth-colored self-cure acrylic resin. Penguin RFA System was used to measure the ISQ of dental implants. The ISQ values were recorded immediately after implant placement, after 4 weeks, after 8 weeks, and after 12 weeks. Results: The mean ISQ values of the immediately loaded implants at the time of placement were 82.60, after 4 weeks were 80.60, after 8 weeks were 83.70, and after 12 weeks were 87.10. There was a statistically significant difference between the ISQ values at the time of placement of implants and after 12 weeks. Conclusion: This study concluded that immediate loading in posterior mandible single tooth region is a safe and predictable option.

Background: In this study, we determined the effect of bone density on implant stability. Methodology: Two hundred and sixty dental implant sites in 128 patients were assessed for resonance frequency analysis (RFA) following implant insertion, at 6 months and 12 months. The implant stability quotient (ISQ) was determined. Results: The mean ± standard deviation bone density in anterior mandible was 862.8 ± 203.4 Hounsfield units (HU), in posterior mandible was 528.4 ± 115.6 HU, in anterior maxilla was 594.2 ± 95.2 HU, and in posterior maxilla was 438.1 ± 110.2 HU. The mean insertion torque in successful implants was 38.2 ± 7.1 Ncm and in failed implants was 22.4 ± 4.2 Ncm. The mean RFA value in successful implants was 65.4 ± 5.8 and in failed implants was 45.8 ± 4.1 ISQ. A statistically significant (P < 0.05) difference was obtained. Conclusion: Within the limitation of the study, we observed that successful implants exhibited higher RFA and insertion torque and were higher into failed implants suggesting a correlation of bone quality and implant stability parameters.

Introduction: Diabetes mellitus is a chronic metabolic disorder leading to hyperglycemia and causes various complications due to vasculopathy. Adequate dental rehabilitation including dental implants plays a key role in promoting the eating habits of diabetics and better metabolic control. Aim: We performed a systematic literature review to investigate the effect of diabetes mellitus on the stabilization and osseointegration of dental implants. Methods: PubMed and Scopus were searched until October 2021. Inclusion criteria: (i) study population included diabetics type I or II, (ii) outcomes were the dental implant failure or resonance frequency analysis, (iii) studies that investigate the effect of diabetes mellitus on the stabilization and osseointegration of dental implants, (iv) studies that were published in English, (v) studies that were published in journals with peer review system, (vi) studies including humans and not animals, (vii) studies that compared diabetics with non-diabetics, and (ix) quantitative studies. Results: 29 studies met the inclusion criteria. Regarding implant failure, 4 studies found statistically significant more frequent implant failure in diabetics, while 5 studies found that implant failure was more frequent in diabetics but was not statistically significant. In contrast, 10 studies found that implant failure was more frequent in non-diabetics but was not statistically significant. 7 studies found that all diabetics and non-diabetics retained their implant during the study. In 6 studies that performed the resonance frequency analysis, no statistically significant difference was found between diabetics and non-diabetics. In 3 studies, the mean value of the implant stability quotient increased statistically significant in non-diabetics, while in 3 studies the mean value of the implant stability quotient increased statistically significant in diabetics. Conclusions: Implant failure is not higher for diabetics than for non-diabetics. Diabetics seem to be able to achieve a rate of dental implants survival like that of non-diabetics. With regards to the resonance frequency analysis, no difference is found between diabetics and non-diabetics. [ABSTRACT FROM AUTHOR]

Background: Primary and secondary implant stability is of high importance for survival and success of dental implants in the short and long term. Measurements of implant stability during healing provide the opportunity to monitor the course of the osseointegration process. Purpose To compare implant stability quotient (ISQ) by resonance frequency analysis (RFA), recorded with two different devices after implant placement. Materials and methods: Patients with the need of single tooth extraction in posterior sites of the maxilla and the mandible were treated in a surgical center. All patients received additional augmentation with a bovine bone substitute and platelet‐rich fibrin (PRF) after atraumatic tooth extraction. After a healing period of 10 weeks, 28 self‐tapping titanium‐implants were placed. Implant stability was recorded with two different devices (Osstell and Penguin) at the time of implant insertion (T0), 10 days later (T1), and after 7 (T2), or 17 weeks (T3). Results: No implant was lost, and no postoperative complication occurred during follow‐up. Patient cohort comprised 9 female (32.1%) and 19 male patients (67.9%), with a mean age of 52.8 years, 64.3 years, respectively. Mean overall insertion torque was 43.6 Ncm at implant placement with no significant difference between implant location, age, or gender. No patient dropped out. During observation period, a significant increase in mean ISQ was recorded with both devices. Significant positive correlations between insertion torque and ISQ were recorded with both devices at T0, T2, and T3. No significant differences were observed in ISQ‐values between both devices, and measuring directions at any point of measurement. Conclusions: Within the limitations of this cohort study, both devices were suitable for RFA‐measurement and revealed comparable results. Due to the cordless design, handling of the Penquin device was more comfortable. Reusability of the Penguin MultiPeg‐transducers may offer an additional benefit with regard on ecological aspects. [ABSTRACT FROM AUTHOR]

Background: Lateral sinus augmentation and simultaneous insertion of dental implants is a highly predictable procedure and associated with high rate of implants success. Aims: To evaluate implant stability changes following maxillary sinus augmentation utilizing deproteinized bovine bone alone or mixed with platelet-rich fibrin. Materials and Methods: A total of 34 lateral sinus augmentation procedures were performed and 50 dental implants simultaneously installed. The lateral sinus augmentation cases were allocated randomly into 3 groups: Group A comprised 13 procedures and 21 dental implants utilizing solely deproteinized bovine bone. Group B involved 10 cases and 16 dental implants using deproteinized bovine bone mixed with leukocyte and platelet-rich fibrin. Group C included 11 operations and 13 dental implants employing deproteinized bovine bone mixed with advanced platelet-rich fibrin. Resonance frequency analysis test was performed immediately after implant installation and 24 weeks postoperatively for the measurement of the implant stability. Results: Implant stability quotient values increased significantly for all study groups 24 weeks after dental implants installation (P= 0.001). The implant stability quotient at T1 (day of implant installation) was 56.93 ±12.01 for group A, 58.34 ±12.82 for group B, and 61.35 ±8.47 for group C. The implant stability quotient at T2 (24 weeks after implant insertion) was 69.17 ±5.10, 69.43 ±5.32, and 68.50 ±7.44, respectively. Conclusion: The addition of leukocyte and platelet-rich fibrin or advanced platelet-rich fibrin to the bovine bone for sinus floor augmentation did not increased the implant stability quotient value in comparison to the bovine bone alone. [ABSTRACT FROM AUTHOR]

Background: In this study, we determined the effect of bone density on implant stability. Methodology: Two hundred and sixty dental implant sites in 128 patients were assessed for resonance frequency analysis (RFA) following implant insertion, at 6 months and 12 months. The implant stability quotient (ISQ) was determined. Results: The mean ± standard deviation bone density in anterior mandible was 862.8 ± 203.4 Hounsfield units (HU), in posterior mandible was 528.4 ± 115.6 HU, in anterior maxilla was 594.2 ± 95.2 HU, and in posterior maxilla was 438.1 ± 110.2 HU. The mean insertion torque in successful implants was 38.2 ± 7.1 Ncm and in failed implants was 22.4 ± 4.2 Ncm. The mean RFA value in successful implants was 65.4 ± 5.8 and in failed implants was 45.8 ± 4.1 ISQ. A statistically significant (P < 0.05) difference was obtained. Conclusion: Within the limitation of the study, we observed that successful implants exhibited higher RFA and insertion torque and were higher into failed implants suggesting a correlation of bone quality and implant stability parameters. [ABSTRACT FROM AUTHOR]

Resonance frequency analysis (RFA) is the most extended method for measuring implant stability. The implant stability quotient (ISQ) is the measure obtained by different RFA devices; however, inter- and intra-rater reliability and agreement of these instruments remain unknown. Thirty implants were placed in three different pig mandibles. ISQ was measured parallel and perpendicular (lingual) to the peg axis with Osstell® Beacon, Penguin® and MegaISQ® by two different investigators and furthermore, one performed a test-retest. Intraclass correlation coefficient was calculated to assess the intra- and inter-rater reliability. Pearson correlation coefficient was used to assess the agreement. Intraclass correlation coefficients ranged from 0.20 to 0.65 for the Osstell® Beacon; 0.57 to 0.86 for the Penguin®; and −0.01 to 0.60 for the MegaISQ®. The highest ISQ values were obtained using Penguin® (66.3) in a parallel measurement; the lowest, using the MegaISQ® (60.1) in a parallel measurement. The highest correlation values with the other devices were obtained by MegaISQ® in a parallel measurement. Osstell® Beacon and MegaISQ® showed lower reliability than Penguin®. Osstell® had good agreement for measuring ISQ both in parallel and perpendicular, and MegaISQ® had the best agreement for measuring ISQ in parallel. [ABSTRACT FROM AUTHOR]

Purpose: The aim of this in vivo study is to compare the variation in implant stability quotient (ISQ) values of implants using resonance frequency analysis (RFA) to access the immediately loaded (within 24 h) implants at different time intervals using Penguin RFA system. Materials and Methods: Ten Nobel Replace Tapered RP implants were placed in posterior mandible region of patients. Patients were included in the study after fulfilling the inclusion criteria. Prior to enrolling in the study, thorough information about the procedure was provided to the patients, and written consent was obtained for the same. Immediate loading was done within 24 h using tooth-colored self-cure acrylic resin. Penguin RFA System was used to measure the ISQ of dental implants. The ISQ values were recorded immediately after implant placement, after 4 weeks, after 8 weeks, and after 12 weeks. Results: The mean ISQ values of the immediately loaded implants at the time of placement were 82.60, after 4 weeks were 80.60, after 8 weeks were 83.70, and after 12 weeks were 87.10. There was a statistically significant difference between the ISQ values at the time of placement of implants and after 12 weeks. Conclusion: This study concluded that immediate loading in posterior mandible single tooth region is a safe and predictable option. [ABSTRACT FROM AUTHOR]

Background: Achievement and maintenance of osseointegration is the prime requisite for the long term success of dental implant in the oral cavity. Various measures have been described in literature to coat the dental implant with a bio-stimulant for achieving adequate and rapid osseointegration. The purpose of present case series was to clinically and radiographically assess the osseointegration around dental implants coated with 1% Metformin gel, in terms of bone mineral density and resonancefrequency analysis. Methods: A total of 22 subjects with missing tooth in the mandibular posterior region were selected and divided into two groups for the study; test group (implants coated with 1% metformin gel prior to their placement) and control group (non-coated dental implants). Along with bone mineral density (BMD) in hounsfield units (HU) and resonance frequency analysis (RFA); clinical parameters including oral hygiene indexsimplified (OHI-S), gingival bleeding index (GBI), modified plaque index (mPI), modified gingival index(mGI), modified sulcular bleeding index(mSBI), width of keratinized mucosa (WKM), probing depth(PD) were recorded at baseline 4 months and all the implants were revaluated at 24 months. Results: There was a statistically significant increase in the mean bone mineral densities at the test area at 4 months (1330.1±21.6HU) when compared to control group. Also, the mean ISQ value for both the groups increased significantly during the course of 4 months. Conclusions: The coating of Metformin on implants has a positive bio-stimulatory effect on osseointegration achieved by them. In the present study this effect was found to be significant for shorter interval (4 months). [ABSTRACT FROM AUTHOR]

Purpose: One-piece dental implants are commonly used for the immediate restoration of missing teeth. In most cases, the clinician has to prepare the abutment intraorally to ensure a proper emergence profile and abutment angulation. However, this procedure might impair primary stability and thus potentially compromise osseointegration. The aim of this study was to determine the effect of abutment preparation on the primary stability of a one-piece implant system (UNO MIS). Materials and Methods: Implant stability was assessed by resonance frequency analysis with a novel custom-made external fixation device, validated previously, developed specifically for resonance frequency measurements of this implant. Thirty 3 × 13-mm implants were inserted in porcine jawbone with insertion torque of 15 Ncm (group A, 15 implants) or 30 Ncm (group B, 15 implants). Abutments were prepared by reducing the facial aspect of the implant abutment with a high-speed dental turbine (400,000 rpm) equipped with a medium-roughness diamond bur. Implant stability quotients (ISQs) were measured before and after abutment preparation. Results: Mean ISQs measured in group A and group B before abutment preparation were very similar (58.2 ± 1.4 and 57.4 ± 0.9, respectively; P > .05). Following abutment preparation, three implants in group A lost primary stability. The mean ISQ value in group A was reduced from 58.2 ± 1.4 to 54.9 ± 7.9 following abutment preparation (P < .05). The mean ISQ in group B was not affected by abutment preparation (57.4 ± 0.9 versus 57.3 ± 1.0; P > .05). Conclusions: Abutment preparation of a one-piece dental implant inserted with low insertion torque might impair implant primary stability. [ABSTRACT FROM AUTHOR]

Purpose: The aim of this study was to analyze the implant stability quotient (ISQ) results of the resonance frequency (RF) during the first day of surgery and 3 months after dental implant placement in the maxilla. Material and methods: This study was approved by 40 patients with total or partial edentulous maxillary jaws underwent with 85 dental implants. The ISQ values were measured from these 85 implants at baseline and 3 months after placement. Osttell Mentor device was invented to measure the RF value of the implant fixture through the transducer or pin. Measurements were taken 4 times in each direction of the inserted oral dental implant. OPG X-ray images were also obtained to evaluate the bone and neighbouring anatomical structures. Results: The ISQ at baseline had a mean value of 58 (SD 5.91) for all implants placed in anterior and posterior sectors of maxillary ridges. The mean ISQ value on the 3rd month (secondary stability) after placement for all implants was 65 (SD 5.55). An ISQ value ≥65 was observed in 65 implants (78.82%) after 3 months of placement. Differences between primary and secondary mean ISQ values were statistically significant (p < 0.001). The one year cumulative success rate was 98.3% for tested and inserted oral implants. Conclusion: The results of presented study demonstrates and suggests that the influence and reliability of Osstell ISQ values, measured immediately and 3 months after placement it’s predictable for the oral implant outcomes, especially analyzing the sensibility of secondary RFA values.

Purpose: One of the crucial requirements for the success of implants is to achieve good stability. Two well-accepted quantitative methods to assess implant stability, the insertion torque value (ITV), and resonance frequency analysis (RFA) can be a valuable adjunct to radiological and clinical examination. This study was conducted to assess the relationship between ITVs and implant stability quotient (ISQ) and its influence on timing of functional implant loading, as well as to determine the effect of some of the factors on the stability of implants. Materials and Methods: Forty implants were inserted in 37 patients in the posterior mandibular region according to conventional protocol and allowed to heal by placing a healing abutment at the time of placement. For each implant, ITV was measured at the time of the implant placement by manual torque wrench (Nobel Biocare), and the ISQ value was measured by using resonance frequency analyzer (Osstell-ISQ; Integration Diagnostics) at the baseline levels, 3rd week, 7th week, 11th week, and 15th week interval. Results: The correlation between ITV and ISQ was found to be moderately positive and significant (r = 0.399) (P = 0.000). The correlation of ITV value at baseline and ISQ values recorded at the subsequent weeks was also found to be statistically significant at week 3 (r = 0.376) (P = 0.000) and week 7 (r = 0.327) (P = 0.000). Conclusion: It can be concluded from this study that there is a positive and statistically significant correlation between the ITV and ISQ values.

Purpose: Immediate loading and/or restoration of dental implants requires the assessment of implant stability, which is best performed by resonance frequency analysis (RFA) prior to loading. One-piece dental implants are usually used for immediate loading, but there is currently no available reliable method to assess the primary stability of one-piece dental implants. Therefore, this study sought to validate a novel device designed for RFA measurements of one-piece implants. Material and Methods: Thirty (3.75 × 13 mm) internal-hex implants (Seven, MIS) were divided into two groups; 15 were placed in an acrylic glass block and 15 were placed in fresh porcine jawbone using 30 N/cm2 of insertion torque. Implant stability quotient (ISQ) values were measured using the Osstell Mentor device; then, a new external fixation device was attached to the implant abutment with a 10-mm arm extending from the implant to an internal-hex ring at its proximal end. ISQ values were measured at the implant's internal hex and at the internal hex of the device, and the damping ratio was calculated. The measurements were repeated with 15 (3 × 13 mm) one-piece implants (UNO, MIS) attached to the same device. Results: The damping ratio between the implant and the proximal device was 23.6% ± 4% in acrylic glass (50.1 ± 1.7 ISQ and 38.2 ± 1.8 ISQ, respectively) and 23.1% ± 3% in porcine bone (74.9 ± 2.8 ISQ and 57.5 ± 0.5 ISQ, respectively). ISQ values determined by the device on one-piece and two-piece implants were similar (57.4 ± 0.9 and 57.5 ± 0.5, respectively). Conclusion: With the present validation of this external fixation device for the measurements of implant stability using RFA, it is now possible to measure primary stability of any one-piece implant system, obviating the need for custom-made Osstell adaptors. [ABSTRACT FROM AUTHOR]

Resonance frequency analysis (RFA) is the most extended method for measuring implant stability. The implant stability quotient (ISQ) is the measure obtained by different RFA devices; however, inter- and intra-rater reliability and agreement of these instruments remain unknown. Thirty implants were placed in three different pig mandibles. ISQ was measured parallel and perpendicular (lingual) to the peg axis with Osstell® Beacon, Penguin® and MegaISQ® by two different investigators and furthermore, one performed a test-retest. Intraclass correlation coefficient was calculated to assess the intra- and inter-rater reliability. Pearson correlation coefficient was used to assess the agreement. Intraclass correlation coefficients ranged from 0.20 to 0.65 for the Osstell® Beacon; 0.57 to 0.86 for the Penguin®; and −0.01 to 0.60 for the MegaISQ®. The highest ISQ values were obtained using Penguin® (66.3) in a parallel measurement; the lowest, using the MegaISQ® (60.1) in a parallel measurement. The highest correlation values with the other devices were obtained by MegaISQ® in a parallel measurement. Osstell® Beacon and MegaISQ® showed lower reliability than Penguin®. Osstell® had good agreement for measuring ISQ both in parallel and perpendicular, and MegaISQ® had the best agreement for measuring ISQ in parallel.

Objective: To present long-term data on the Wide Ponto implant bone-anchored hearing system (BAHS) in regards to implant stability, soft tissue reaction and implant loss for two case series undergone either the tissue reduction- or the tissue preservation surgical technique.Methods: Comparison of two consecutive, prospective case series. Each case series enrolled 24 patients. The case series underwent one-stage implantation of the Wide Ponto implant BAHS using either a linear incision technique with subcutaneous reduction or a linear incision technique without subcutaneous reduction. Implant stability quotient (ISQ) values were measured using resonance frequency analysis and soft tissue reactions were graded according to Holgers' classification system. Follow-up visits were performed at 10 days, 6 weeks, 6 months, 12 months and annually up to 4 years (tissue preservation) or 5 years (tissue reduction) postoperatively.Results: The two case series had homogenous patient populations and followed an identical postoperative scheme. The ISQ values increased consistently the first 12 months for both groups (p ≤ 0.001), and were higher in the tissue preservation case series, (p = 0.04, 9 mm abutment). More than 91% of the soft tissue observations were assessed as Holgers' grade 0 or 1. One implant (2.1%) was lost due to trauma.Conclusion: In both case series, the Wide Ponto implant showed increasing implant stability during the follow-up period from the time of surgery, irrespective of surgical technique, indicating good osseointegration. Soft tissue reactions were rare and of minor severity. Implant survival was high. [ABSTRACT FROM AUTHOR]

Abstract A simple mathematical model for free vibrations of an elastically clamped beam is suggested to interpret the results of the resonance frequency analysis developed for implant stability measurements in terms of the Implant Stability Quotient (ISQ) units. It is shown that the resonance frequency substantially depends on the lateral compliance of the implant/bone system. Based on the notion of the lateral stiffness of the implant/bone system, a new measure of the implant stability is introduced in the form similar to the ISQ scale and is called the Implant Clamping Quotient (ICQ), because it characterizes the jawbone's clamp of the implant. By definition, the ICQ unit is equal to a percentage of the original scale for the lateral stiffness of the implant/bone system. [ABSTRACT FROM AUTHOR]

Hairong Huang,1 Daniel Wismeijer,1 Xianhong Shao,2 Gang Wu1 1Department of Oral Implantology and Prosthetic Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), MOVE Research Institute, VU University Amsterdam and University of Amsterdam, Amsterdam, Nord-Holland, the Netherlands; 2Best & Easy Dental Clinic, Hangzhou, Zhejiang Province, People’s Republic of China Objectives: The objective of this study is to mathematically evaluate the influence of multiple factors on implant stability quotient values in clinical practice.Patients and methods: Resonance frequency analysis was performed at T1 (measured immediately at the time of implant placement) and at T2 (measured before dental restoration) in 177 patients (329 implants). Using a multivariate linear regression model, we analyzed the influence of the following eleven candidate factors: sex, age, maxillary/mandibular location, bone type, immediate/delayed implantation, bone grafting (presence or absence), insertion torque, I-/II-stage healing pattern, implant diameter, implant length, and T1–T2 time interval.Results: The following factors were identified to significantly influence the implant stability quotient (ISQ) values at T1: insertion torque, bone grafting, I-/II-stage healing pattern, immediate/delayed implantation, maxillary/mandibular location, implant diameter, and sex. In contrast, the ISQ values at T2 were significantly influenced only by three factors: implant diameter, T1–T2 time interval, and insertion torque.Conclusion: Among the eleven candidate factors, seven key factors were found to influence the T1-ISQ values, while only three key factors influenced the T2-ISQ values. Both T1 and T2-ISQ values were found to be influenced by implant diameter and insertion torque. T1 was influenced specifically by the sex of the patient, the location (maxillary or mandibular), the implantation mode (immediate/delayed implantation), the healing stage, and the absence or presence of bone graft materials. Keywords: resonance frequency analysis, implant stability quotient, dental implant, immediate implantation, delayed implantation, insertion torque

Purpose: One of the crucial requirements for the success of implants is to achieve good stability. Two well-accepted quantitative methods to assess implant stability, the insertion torque value (ITV), and resonance frequency analysis (RFA) can be a valuable adjunct to radiological and clinical examination. This study was conducted to assess the relationship between ITVs and implant stability quotient (ISQ) and its influence on timing of functional implant loading, as well as to determine the effect of some of the factors on the stability of implants. Materials and Methods: Forty implants were inserted in 37 patients in the posterior mandibular region according to conventional protocol and allowed to heal by placing a healing abutment at the time of placement. For each implant, ITV was measured at the time of the implant placement by manual torque wrench (Nobel Biocare), and the ISQ value was measured by using resonance frequency analyzer (Osstell-ISQ; Integration Diagnostics) at the baseline levels, 3rd week, 7th week, 11th week, and 15th week interval. Results: The correlation between ITV and ISQ was found to be moderately positive and significant (r = 0.399) (P = 0.000). The correlation of ITV value at baseline and ISQ values recorded at the subsequent weeks was also found to be statistically significant at week 3 (r = 0.376) (P = 0.000) and week 7 (r = 0.327) (P = 0.000). Conclusion: It can be concluded from this study that there is a positive and statistically significant correlation between the ITV and ISQ values. [ABSTRACT FROM AUTHOR]

The aim of the investigation was to evaluate the insertion torque, pull-out torque and implant stability quotient (ISQ) of short implants (SI) and standard length implants (ST) inserted into linearly elastic and constitutive isotropic symmetry polyurethane foam blocks. Short dental titanium implants with a Cone Morse connection and a conical shape (test implants: Test Implant A—diameter 5.5 mm and length 6 mm) (Test Implant B—diameter 5.5 mm and length 5 mm) were used for the present in vitro investigation. ST implants (4 mm diameter and 10 mm length), with a Cone Morse connection and a conical shape, were used as Control Implant A and as Control Implants B. These two latter implants had a different macro design. A total of 20 implants (5 Test A, 5 Test B, 5 Control A and 5 Control B) were used for the present research. The results were similar when comparing the Test A and Test B implants. The test implants had very good stability in polyurethane 14.88−29.76 kgm3 density blocks. The insertion torque values were very high for both types of test implant (25−32 Ncm on 14.88 kgm blocks, and up to 45 Ncm in 29.76 kgm3 blocks). The pull-out test values were very similar to the insertion torque values. The ISQ values were significantly high with 75−80 in 14.88 kgm3 blocks, and 78−83 in 29.76 kgm3 blocks. No differences were found in the values of the Control A and Control B implants. In both these implants, the insertion torque was quite low in the 14.88 kgm3 blocks (16−28 Ncm). Better results were found in the 29.76 kgm3 blocks. The pull-out values for these control implants were slightly lower than the insertion torque values. High ISQ values were found in both control implants (57−80). When comparing SI and ST implants, the SI had a similar if not better performance in low quality polyurethane foam blocks (14.88−29.76 kgm), corresponding to D3 and D4 bone.