Search

Wettability is recognized as an important property of implant surfaces for ensuring improved biological responses. However, limited information exists on how bone grafting procedures including materials influence the hydrophilic behavior of implant surfaces. This in vitro study aimed to investigate the influence of two bovine grafting materials after hydration on the wettability of four different disk surfaces: commercially pure titanium (CP-Ti), titanium–zirconium dioxide (TiZrO2-Cerid®), zirconia (SDS®), and niobium. Wettability tests were performed on each of the four implant surfaces with a solution of 0.9% sodium chloride after mixture with W-boneTM (Group A) or Bio-Oss® (Group B) or 0.9% sodium chloride alone (Group C). In total, 360 contact angle measurements were completed with n = 30 per group. Statistical analysis was performed using a one-way analysis with variance (ANOVA) test with a significant mean difference at the 0.05 level. For pure titanium, Group A demonstrated increased hydrophilicity compared to Group B. Both TiZrO2 and zirconia showed significant differences for Groups A, B and C, exhibiting a decrease in hydrophilicity after the use of bovine grafting materials compared to titanium surfaces. Niobium remained consistently hydrophobic. In summary, this study revealed that bovine grafting materials may diminish the hydrophilicity of zirconia surfaces and exert varied effects on titanium and niobium. These findings contribute to the understanding of implant surface interactions with grafting materials, offering insights for optimizing biological responses in implantology. [ABSTRACT FROM AUTHOR]

To determine the effect of different dental lab materials on cone beam computed tomography (CBCT) metal artifact at different resolutions. A total of seven common dental lab materials were molded to a dental sextant of four extracted, restored teeth. In addition to base alone (control), each material was scanned using the Carestream 9600 CBCT unit at three resolutions – 0.3 mm, 0.15 mm, and 0.075 mm – at manufacturer established exposure parameters. A single, representative axial view of each trial was evaluated for metal artifact both quantitatively by histogram analysis and qualitatively by profile plot analysis in ImageJ. No statistically significant differences between the control and the dental materials were found; however, post-hoc tests showed significance between Blu-mousse® and polyvinyl siloxane with dental materials and control, predominantly in lower resolutions. The current study provides initial evidence on the influence of dental materials have on CBCT metal artifact as described by beam hardening, photon starvation, scatter, and noise, especially at lower resolutions. Blu-Mousse® and polyvinyl siloxane reduced the perceived beam hardening and photon starvation artifact the greatest, relative to other materials, at all three resolutions and lower resolutions, respectively. [ABSTRACT FROM AUTHOR]

Purpose: To evaluate decayed, missing, and filled surfaces in primary teeth (dmfs) in Down syndrome subjects (DS) compared to typically developed (TD) controls using analysis. Methods: A retrospective study of 440 matched subjects (220 DS and 220 TD) was conducted. Categorical variables were evaluated for association with dental caries, with mean dmfs as the main outcome measure. Pearson's chi-square and independent sample t-tests for unequal variances for means were employed. Results: Overall, the TD control group was found to have significantly higher mean dmfs scores than the DS group: TD Equals 17.65 (mean dmfs), 95% confidence interval (CI) equals 15.48 to 19.90; DS equals 10.30 (mean dmfs), at 95% CI equals 7.96 to 12.78, (P<0.001). However, when controlled for the variable factors African American status (P=0.11), Hispanic status (P=0.07) and income level at or below 200 percent of poverty level (P=0.24) there was no significant difference in mean dmfs. Conclusions: In the study population DS and TD exhibited dissimilar dmfs scores, while when taking into consideration social and economic factors dmfs was equivalent. Caries risk factors modulate disease experience and should be considered in all population-specific studies. Patients with multiple high-risk factors should be treated as such, regardless of DS status. [ABSTRACT FROM AUTHOR]

Objectives: To determine the effect of different dental lab materials on cone beam computed tomography (CBCT) metal artifact at different resolutions., Methods: A total of seven common dental lab materials were molded to a dental sextant of four extracted, restored teeth. In addition to base alone (control), each material was scanned using the Carestream 9600 CBCT unit at three resolutions - 0.3 mm, 0.15 mm, and 0.075 mm - at manufacturer established exposure parameters. A single, representative axial view of each trial was evaluated for metal artifact both quantitatively by histogram analysis and qualitatively by profile plot analysis in ImageJ., Results: No statistically significant differences between the control and the dental materials were found; however, post-hoc tests showed significance between Blu-mousse ® and polyvinyl siloxane with dental materials and control, predominantly in lower resolutions., Conclusions: The current study provides initial evidence on the influence of dental materials have on CBCT metal artifact as described by beam hardening, photon starvation, scatter, and noise, especially at lower resolutions. Blu-Mousse ® and polyvinyl siloxane reduced the perceived beam hardening and photon starvation artifact the greatest, relative to other materials, at all three resolutions and lower resolutions, respectively.

Pain from local anesthesia injections can be reduced by distraction and counter-stimulation techniques. This study investigated the DentalVibe® Injection Comfort System (third-generation, DV3), developed to lessen anesthesia pain through pulsed vibration, a form of counter-stimulation. The aim of the study was to evaluate both the efficacy of DV3 in reducing pain and discomfort from intraoral long buccal (LB) and inferior alveolar nerve (IAN) injections and the time needed to achieve complete anesthesia during an IAN block. The study enrolled 60 subjects, 30 men and 30 women, aged 21 to 32 years, who rated both injection pain on a visual analog scale and discomfort, unpleasantness, and difficulty in enduring the injection on a modified symptom severity index. Each subject received bilateral LB injections and an IAN block. Using block design, the third-generation DV (DV3) was randomly assigned to either the first or second LB injection and to 30 subjects on their third injection, the IAN block. No topical anesthesia was applied. Subjects receiving DV3 reported significantly less pain, discomfort, unpleasantness, and difficulty in enduring LB and IAN injections (P < .05), regardless of whether DV3 was used on the first or second LB injection. Time to complete anesthesia was not significantly different (P > .05) when DV3 was used on IAN block injections. The DV3 significantly (P < .02) reduced pain/discomfort from anesthetic injections in this pilot study, in which many subjects were either dental or medical students familiar with performing and enduring injections. More studies are warranted on layperson populations.