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Made available in DSpace on 2022-04-29T08:32:39Z (GMT). No. of bitstreams: 0 Previous issue date: 2022-02-01 Objective The aim of this study was to compare the direct relining technique with the indirect relining technique in relation to quality of life, satisfaction with the relining, occlusal force, and halitosis of users of acrylic complete dentures. Materials and Methods Twenty bimaxillary edentulous individuals were selected. They had to use the same pair of complete dentures for a minimum of 1 year and a maximum of 5 years. The subjects were randomly divided in groups of direct relining and indirect relining of the inferior denture (n = 10). Both groups received the same silicone-based relining. The clinical tests verified the quality of life (Oral Health Impact Profile in edentulous individuals), the satisfaction with the relining, the occlusal force, and halitosis. The tests (halitosis and occlusal force) were performed initially (before the relining), immediately after the relining, and 30, 60, 90, and 180 days after the relining. The questionnaires (quality of life and satisfaction with the relining) were performed initially (before the relining), and 30, 60, 90, and 180 days after the relining. Statistical Analysis Analysis of variance and the Tukey test were used (p < 0.05). Results There was no statistical difference comparing the two techniques in all the evaluations (p < 0.05). There was a significant statistical difference for the factor of time in all clinical tests for each relining technique (p < 0.05). The quality of life and satisfaction with the relining increased significantly 30 days after the relining when compared with the initial time point, for both techniques (p < 0.05). The occlusal force increased significantly after 90 and 180 days when compared with the initial time point, for both techniques (p < 0.05). Halitosis decreased significantly immediately after the relining when compared with the initial time point, for both techniques (p < 0.05). Conclusion Independent of the relining technique used, there was an increase in the quality of life, satisfaction with the relining, and occlusal force, as well as a reduction in the level of halitosis. Both techniques generated similar results and therefore can be options in clinical practice. Department of Dental Materials and Prosthodontics School of Dentistry São Paulo State University, Araçatuba, José Bonifácio, 1193, SP Oral Oncology Center School of Dentistry São Paulo State University, São Paulo Department of Pediatric and Social Dentistry School of Dentistry São Paulo State University, Araçatuba São Paulo Department of Dental Materials and Prosthodontics School of Dentistry São Paulo State University, Araçatuba, José Bonifácio, 1193, SP Oral Oncology Center School of Dentistry São Paulo State University, São Paulo Department of Pediatric and Social Dentistry School of Dentistry São Paulo State University, Araçatuba São Paulo

The aim of this study was to compare PETG/TPU (polyethylene terephthalate glycol/thermoplastic polyurethane) with PETG (polyethylene terephthalate glycol), based on color stability and microhardness. Sixty circular specimens (10 mm in diameter × 3 mm thick) were fabricated (30 PETG/TPU and 30 PETG). The specimens in both groups were submitted to 2000 thermal cycles in alternating baths of 60 seconds at 5°C ± 1°C and 55°C ± 1°C. The specimens were then divided into subgroups (n = 10) that were disinfected 15 minutes per day for 60 days in 1 of 3 solutions: liquid soap, 2% chlorhexidine, or Listerine. Color change (∆E*) and Knoop microhardness tests were performed at baseline (T0), after thermocycling (T1), and after disinfection (T2). Analysis of variance (ANOVA) and Tukey test were used (P0.05). ANOVA showed that there was no statistically significant difference in color change between the 2 materials after thermocycling (∆E*1) or after disinfection (∆E*2), regardless of the disinfectant. Intragroup comparisons (Listerine, liquid soap, and 2% chlorhexidine) of the 3 PETG/TPU groups or 3 PETG groups after disinfection revealed no statistically significant difference for microhardness. Comparison of PETG/TPU with PETG based on the overall mean microhardness showed that the PETG/TPU had a significantly greater mean surface hardness value (P0.05). The Tukey test revealed statistically significant increases in microhardness at T1 and T2 for PETG/TPU and PETG so that T0T1T2 (P0.05). Both thermoplastic materials demonstrated an increase in hardness after thermocycling and after disinfection, and both showed similar color changes regardless of the disinfection method. Based on the color evaluation, the liquid soap proved to be the best option for disinfection of PETG/TPU and PETG, because the color change (∆E* value) was clinically acceptable for both materials.

Made available in DSpace on 2020-12-10T19:46:17Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-01-01 Background: The aim of this study was to verify, through self-assessment questionnaires, the influence of implant-supported prosthesis in salivary flow and anxiety of patients rehabilitated with them. Materials and Methods: Visual analog scale (VAS) questionnaire about xerostomia and State-Trait Anxiety Inventory were applied before (T1) and after 2 days (T2) and 3 weeks (T3) of prostheses installation. The study included patients rehabilitated with implant-supported prostheses containing three or more dental elements. A total of 17 patients were evaluated. Results: In VAS questionnaire, there was a significant increase in the difficulty of speaking and swallowing with dry mouth. The other VAS questions showed no statistically significant difference, indicating no changes in patients' salivary flow. Conclusions: It was concluded that the installation of implant-supported prostheses does not lead to major changes in patients' perception about their salivary flow and psychological state, causing no improvement or worsening in the characteristics evaluated. Sao Paulo State Univ, Aracatuba Dent Sch, Dept Dent Mat & Prosthodont, Jose Bonifacio 1193 Vila Mendonca, BR-16015050 Aracatuba, SP, Brazil Sao Paulo State Univ, Aracatuba Dent Sch, Dept Dent Mat & Prosthodont, Jose Bonifacio 1193 Vila Mendonca, BR-16015050 Aracatuba, SP, Brazil

As lesões de mancha branca em esmalte são complicações clínicas comumente encontradas e causam desconforto nos pacientes por prejudicarem a estética. Uma alternativa vantajosa para tratar essas lesões é a infiltração resinosa, que garante a conservação da estrutura sadia do dente pela sua intervenção minimamente invasiva. Paciente com hipoplasia de esmalte nos dentes 12 e 13, teve como tratamento a associação do clareamento dental e microabrasão, seguida do o protocolo de infiltração resinosa (Icon®). Ao final dos procedimentos, foi constatada alteração cromática dos dentes, tornando a mancha imperceptível nos dentes da paciente. A principal vantagem da infiltração resinosa foi garantir a preservação de tecido dental saudável e reestabelecer a estética dental, mesmo em manchas profundas.

Made available in DSpace on 2020-12-12T01:52:22Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-01-01 Objective. The aim of this study was to evaluate the tear strength of MDX4-4210 and A-2186 silicones with different intrinsic pigments incorporated by mechanical and industrial methods, comparing nonaged and aged groups. Materials and Methods. Twenty-four groups were created according to the American Society for Testing and Materials D-624/type C, half nonaged and half aged (n = 10): bronze mechanical MDX4-4210, bronze industrial MDX4-4210, black mechanical MDX4-4210, black industrial MDX4-4210, pink mechanical MDX4-4210, pink industrial MDX4-4210, bronze mechanical A-2186, bronze industrial A-2186, black mechanical A-2186, black industrial A-2186, pink mechanical A-2186, and pink industrial A-2186. All specimens were submitted to tear strength analysis. Data were submitted to the ANOVA and Tukey test (p

Purpose To investigate if the presence of a cantilever influences the survival and success of partial fixed implant-supported prostheses, through a systematic review and meta-analysis, with additional analysis of the survival and marginal bone loss rates and prosthesis complications. Materials and methods The register protocol of the review in the PROSPERO database is CRD42016052008. The MEDLINE and Scopus databases were used for an electronic search of relevant studies up to November 2016, by means of two independent reviewers. The keywords included the combinations "fixed partial denture" with "dental implants", and with "extension" or "cantilever"; and "implant-supported dental prosthesis" with "extension" or "cantilever". The inclusion criteria were randomized clinical trials and prospective and retrospective clinical studies in English that addressed the comparison of success and survival of the use of implant-supported fixed prostheses, with and without cantilevers. Data from the selected studies were used to perform the statistical analysis. Results Among the 408 articles identified, 4 articles met the eligibility criteria. The presence of a cantilever did not compromise marginal bone loss or the survival of the prostheses. However, minor complications were encountered for the group of partial fixed prostheses without cantilevers, with a statistical difference (P = .008). Conclusion Cantilevers can be used in fixed prostheses and do not interfere negatively in the survival or success of the prosthesis or the marginal bone loss. However, there are minor complications when prostheses without cantilevers, or short cantilevers, are used.

Made available in DSpace on 2019-10-06T15:57:37Z (GMT). No. of bitstreams: 0 Previous issue date: 2018-07-04 In some clinical situations, the clinician may encounter previously installed implants that should be associated with other implants for a proper rehabilitation. The aim of this study was to evaluate the biomechanical behaviour of a multiple prosthesis joined by different implant connections using photoelasticity. Photoelastic models with a screwed fixed prosthesis supported by implants with different connection systems (Morse taper, external hexagon, internal hexagon, and Flexcone), and different combinations among them, were fabricated. Each assembly was placed in a circular polariscope, and axial and oblique (45°) loads of 100 N were applied on the occlusal surface of the crowns. The fringe patterns were photographed and the analysis was performed by counting the number of high-intensity fringes and also according to the stress distribution region where they appeared. Among implants of the same connection, the external connections obtained a greater number of high intensity fringes when compared to the internal connections. From the biomechanical point of view, the association between different types of connections obtained positive results. Department of Dental Materials and Prosthodontics Aracatuba Dental School UNESP Sao Paulo State University Department of Dental Materials and Prosthodontics UnB University of Brasilia Department of Dental Materials and Prosthodontics Aracatuba Dental School UNESP Sao Paulo State University

Introduction The treatment of orofacial tumors may cause facial deformities by losses of structures that affect basic functions, i.e. feeding, speech, and the reduction of patient self-steam. Presentation of case A white male patient was diagnosed with epidermoid cancer on the mandibular alveolar ridge with infiltration staging IV A. The patient was submitted to a mandibulectomy associated with a complete extraction of mandibular teeth. For rehabilitation, a conventional denture for the mandibular arch and a removable partial denture for the maxillary arch were fabricated. A correct occlusal adjustment and a satisfactory amount of alveolar bone was favorable for conventional dentures of the prostheses bases improve their retention and stability. After one year of follow-up, the patient was adapted to the prostheses, satisfied with their retention, and reported an improvement on his feeding. Discussion The prosthetic rehabilitation of patients after a partial mandibulectomy is essential for their self-steam. Conventional dentures may have their retention and stability improved if they are well fabricated, recorded and have a balanced occlusion. Conclusion A correct occlusal adjustment and an adequate retention of the prostheses bases may improve their retention and stability. Patients without xerostomy and with a satisfactory amount of alveolar bone may have a favorable prognosis for conventional dentures., Highlights • Oral Surgery oncology. • This study investigated the esthetic of the prosthesis rehabilitation. • Patient satisfaction after rehabilitation.

Made available in DSpace on 2018-12-11T17:22:38Z (GMT). No. of bitstreams: 0 Previous issue date: 2018-01-01 Introduction: For many years, edentulous patients have had no other option than conventional dentures to reestablish their oral function. To avoid the need for bone graft surgery, some professionals have suggested the use of mini dental implants (MDIs) to support prostheses. The MDIs are narrow implants, ranging approximately from 1.8 to 2.9 mm in diameter. Recently, the promising results of mini implants regarding osseointegration and patient satisfaction have led clinicians to accept them as a definitive treatment option. Objective: Therefore, the proposition of this systematic review was to assess information on the outcomes of MDIs supporting removable prostheses. Methods:The PubMed and Cochrane databases were searched for articles published before September 2017, which yielded a total of 774 studies for analysis. After exclusion and inclusion criteria, 22 prospective studies were included in this systematic review. Results: Most mini implants were placed in a flapless single-stage surgery and loaded immediately. Most studies reported failures in the first year and prosthetic complications. The mean survival rate of the selected studies was 95.6%, and mean follow-up was 22.8 months. Conclusion: The MDI-supported removable prostheses successfully improved patients’ chewing and speaking ability, quality of life, and satisfaction, suggesting that MDIs are a viable and safe option to support removable prostheses in the mandibular arch. Department of Dental Materials and Prosthodontics Aracatuba Dental School Univ Estadual Paulista (UNESP) Department of Dental Materials and Prosthodontics Aracatuba Dental School Univ Estadual Paulista (UNESP)

Highlights • This study investigated the aesthetic of the prosthesis rehabilitation. • Patient satisfaction after rehabilitation. • Importance of radiographic control case report., Introduction The aim of this paper was to present a rehabilitation of a patient with a dynamic universal castable long abutment (UCLA) for a single tilted implant in the anterior maxillary area. Presentation of case A 57-year-old male patient attended the dentistry college clinic complaining of a vertical fracture of a residual root of the dental element 22. The tooth extraction was indicated for the implant installation. Due to the socket buccal wall thickness, the implant was installed with an inclination to the palate. It was done in a two-stage surgical protocol, and an external hexagon implant (3.75 × 11.5 mm) was placed. After a six-month healing period to correct the implant position, a dynamic UCLA was set in place, rectifying the implant emergence profile at 20°. The ceramic structure fitting was performed and, after the patient’s consent, the prosthesis was finalized and installed. Discussion After a follow-up period of twenty months, no complications were observed. Conclusion The installation of tilted implants with a dynamic UCLA may be a viable option, faster and less invasive than bone grafts.

Made available in DSpace on 2018-12-11T17:15:49Z (GMT). No. of bitstreams: 0 Previous issue date: 2017-09-01 Aims: Compare the mechanical and physical properties of two polishing techniques for acrylic resins under the influence of disinfection. Materials and Methods: Two hundred and eight circular samples (10 mm diameter × 3 mm height) were manufactured, with 160 for the color stability, hardness, surface roughness, and wettability (n = 10) analyses, and 48 for the scanning electron microscopy and atomic force microscopy evaluation (n = 1). Two brands of prosthesis acrylic resin, Onda Cryl and Lucitone, were used to manufacture the samples. Half of the samples were intrinsically pigmented with a purple acrylic pigment (Policor) at 7% of the total weight in powder; half of those received the mechanical polish with sand paper under constant water irrigation in a universal polishing machine at 300 rpm (control), and half received a uniform coat of a photopolymerized glaze (Megaseal) to be tested. The samples were kept immersed in distilled water for 24 h before the initial measurements (T0), afterward, they were divided into two disinfection procedures; half were disinfected through microwave energy and half through cleaning tablets (Efferdent) for 60 days (T1). Results: The glaze polished groups presented inferior chromatic stability and the pigments prevented discoloration for the glaze polish. The disinfectant solutions promoted a superficial degradation of the acrylic resin for both polishing techniques. Lucitone presented higher hardness values than Onda Cryl (P < 0.001) and the glaze technique had higher hardness values than the mechanic polish. Conclusion: The photopolymerized glaze improved some characteristics of the acrylic resin, such as the surface hardness and roughness suggesting it is an adequate polish for acrylic resins. Department of Dental Materials and Prosthodontics Aracatuba Dental School Unesp Univ Estadual Paulista Private Practice Cascavel Department of Techonological Plasmas Univ Estadual Paulista Department of Dental Materials and Prosthodontics Aracatuba Dental School Unesp Univ Estadual Paulista Department of Techonological Plasmas Univ Estadual Paulista

Made available in DSpace on 2018-11-12T17:27:43Z (GMT). No. of bitstreams: 0 Previous issue date: 2017-09-01. Added 1 bitstream(s) on 2018-11-12T17:35:46Z : No. of bitstreams: 1 S1981-86372017000300243.pdf: 159337 bytes, checksum: 09cb8e0fd147ad427b9d9053eacbd4b8 (MD5) RESUMOObjetivo Avaliar os aspectos subjetivos relacionados à percepção da aparência dental e expectativas de pacientes que recebem tratamento odontológico nas clínicas de graduação da Faculdade de Odontologia de Araçatuba.Métodos Foram avaliados 362 pacientes de ambos os sexos com idade superior a 18. O questionário incluiu perguntas sobre dados demográficos, perguntas para avaliar a estética facial e dentária, a satisfação dental e tratamentos considerando a noção dos pacientes de melhorar a estética dental. Os dados coletados foram analisados por meio de estatística descritiva e o teste do qui-quadrado.Resultados O fator dentes para análise facial e o fator posicionamento no arco para análise sorriso foram considerados os temas mais importantes a respeito da estética, de acordo com os entrevistados. 67,5% dos pacientes estavam insatisfeitos com a aparência de seus dentes, a insatisfação com a cor foi o fator mais importante (66,8%). O tratamento mais desejado foi o clareamento dental e 85,0% dos pacientes disse sim a ele.Conclusão Os pacientes dão grande valor aos dentes sobre a aparência rosto, e ele pode ser visto que os tratamentos estéticos são altamente valorizados em todos os grupos etários. Há uma necessidade de tratamentos para restabelecer a função, mas os tratamentos para melhorar a aparência dentária foram os mais solicitados. ABSTRACTObjective The aim of this study was to investigate the subjective aspects related to the perception of dental appearance and expectations of patients who receive dental treatment in graduation clinics of the Araçatuba Dental School.Methods It was evaluated 362 patients of both gender aged over 18. The questionnaire included questions of demographic data, questions to assess facial and dental aesthetics, dental satisfaction and treatments considering patients notion to improve dental esthetics. The data collected was analyzed using descriptive statistics and the chi-square test.Results The factor teeth for facial analysis and factor positioning in the arch for smile analysis were considered the most important subjects regarding the esthetic according to the respondents. 67.5% of patients were dissatisfied with the appearance of their teeth, and dissatisfaction with the color was the most important factor (66.8%). The treatment most desired was tooth whitening and 85.0% of patients said yes to it.Conclusion Respondents place great value on the teeth on the face appearance, and it can be seen that aesthetic treatments are highly valued in all age groups. There is a need for treatments to restore the function, but treatments to improve dental appearance were the most requested. Universidade Estadual Paulista Faculdade de Odontologia Departamento de Materiais Odontológicos e Prótese Universidade Federal de Goiás Faculdade de Odontologia Departamento de Reabilitação Oral Universidade Estadual Paulista Faculdade de Odontologia Departamento de Materiais Odontológicos e Prótese

The aim of this meta-analysis was to verify the clinical viability of single implant-retained mandibular overdentures (SIMO). An electronic search of the PubMed and Cochrane databases was performed (end date July 2017); this was supplemented by a manual search of the literature. Only prospective clinical trials and randomized controlled trials (RCTs) that evaluated SIMO with a minimum follow-up of 12 months were included. The meta-analysis was based on the Mantel-Haenszel method. Dental implant and prosthetic failure were the dichotomous outcome measures; these were evaluated through the risk ratio (RR) and odds ratio (OR), with corresponding 95% confidence intervals (CI). Of 499 articles identified, nine fulfilled the inclusion criteria. A total of 205 implants were placed in patients with a mean age of 64.1 years; the cumulative survival rate was 96.6% over a mean follow-up period of 37.3 months. The procedure used (SIMO vs. two implant-retained mandibular overdenture) did not affect dental implant failure (P=0.45) or prosthetic failure (P=0.65): RR 1.06 (95% CI 0.91-1.23) and RR 0.88 (95% CI 0.51-1.51), respectively; OR 2.56 (95% CI 0.27-24.39; P=0.41) and OR 0.44 (95% CI 0.15-1.26; P=0.13), respectively. Within the limitations of this systematic review and meta-analysis, SIMO with a complete denture as the opposing arch may be considered an alternative treatment for completely edentulous patients. However, this study also confirmed the need for more RCTs on this topic.

The aim of this study was to evaluate the influence of different adhesive techniques and accelerated aging on the bonding of maxillofacial biomedical silicone to an acrylic resin substrate. 960 acrylic resin samples (PMMA) were manufactured and bonded to the silicone with or without oil painting and/or opacifier. Both materials were bonded through mechanical retentions and/or application of primers (DC 1205 primer and Sofreliner primer S) and adhesive (Silastic Medical Adhesive Type A) or not (control group). The samples dimension were 75-mm length, 10-mm width and 6-mm thickness.The samples were divided in 4 groups ( n =240) for the pigmentation variable, and 12 subgroups ( n =20) accordingly to the bonding technique. Half of the samples of each group underwent the peel test at baseline and the fracture pattern was measured through direct observation and SEM and then classified into adhesive, cohesive and both failure. The remaining samples were submitted to accelerated aging (8 hours – ultraviolet light irradiance was at a temperature of 60±3 °C and 4 h – a dark condensation period was at a temperature of 45±3 °C) during 1008 hours and the peel test, direct observation and SEM were performed. The peel value needed to separate the resin from silicone (PS) was statistically analyzed with the ANOVA variance test and the Tukey test ( p p n =671=69.9%) and the least common was the cohesive one ( n =109). Greater PS values were presented by the subgroups pigmented with oil painting, without scratches and that received the sofreliner primer after the accelerated aging period. The sofreliner primer promotes a higher adherence between acrylic resin and facial silicone and the incidence rate of both failure augmented after the aging period.

Made available in DSpace on 2018-12-11T17:10:52Z (GMT). No. of bitstreams: 0 Previous issue date: 2017-05-19 New systems are released in the odontological market with the objective of bringing improvements and advancements in the clinical success of implants and implant-supported prostheses. The distribution of tension for the bone/implant system of these new systems is important. The purpose of this work was to evaluate, by photoelastic analysis and strain gauges, the distribution of tension for the bone/implant system, using the Slim system. A photoelastic cast with an external hexagon implant was manufactured and a metal prosthesis was screwed below it, with or without the tested system. For the photoelasticity methodology, a photoelastic cast, with or without the tested system, was positioned in a circular polariscope, and axial loads of 100 N were applied to the centre of the crown. The pattern of tension generated was photographed and analysed qualitatively in an imaging programme. For the extensometry methodology, two extensometers were placed in the mesial and distal region of the implant in the photoelastic cast. The axial loads were applied to the group again, with or without the system (n = 10). The t test of independent samples with a significance level of 5% was used for this analysis. This study demonstrated greater tension values for both the photoelastic and extensometry methods when the tested system was used. Clinical studies must be performed to evaluate the tested system because the results might not be clinically significant to a bone reabsorption. Department of Dental Materials and Prosthodontics Aracatuba Dental School São Paulo State University (UNESP) Department of Dental Materials and Prosthodontics Aracatuba Dental School São Paulo State University (UNESP)

Made available in DSpace on 2018-12-11T17:06:20Z (GMT). No. of bitstreams: 0 Previous issue date: 2017-02-17 Short dental implants have been used as an attempt to avoid bone grafts surgery, however there are few literature reports that evaluate changes to their design. Therefore, the aim of this study was to assess the effect of different short implant design on stress distribution through photoelastic analysis. Six external hexagon (5 × 5 mm) short dental implants with different design were used. Each group was treated with a single crown and a three element fixed partial dental prosthesis, resulting in a total of 12 photoelastic models. The assembling photoelastic model-implant-prosthesis was set in a circular polariscope where loads of 100N were applied on the occlusal surface with a Universal Test Machine (UTM). The tension fringes were photographed and later assessed qualitatively by a graphic software (Adobe Photoshop). Less high-intensity fringes were observed on the short implants with triangular threads, short external hexagon and flat apical profile. In conclusion, the macrodesign influenced the amount of stress distributed to the bone when short dental implants are placed. Department of Dental Materials and Prosthodontics Aracatuba Dental School São Paulo State University (UNESP) Department of Dental Materials and Prosthodontics Aracatuba Dental School São Paulo State University (UNESP)

Objectives The aim of this study was to investigate the outcomes of the installation of two implant-supported overdentures until such treatment is complete. Although this treatment is well established in the literature, there are no studies comparing what happens to muscles and the quality of life (QoL) of patients during the treatment. Methods We selected 13 completely edentulous patients, according to inclusion and exclusion criteria, to rehabilitate with mandibular overdentures retained by two dental implants and a complete denture as antagonists. We evaluated the efficacy of the treatment and its evolution in five steps: (i) initially, with the old complete dentures, (ii) after the implants' placement with the mandibular prosthesis relined, (iii) after the placement of the healing abutments, (iv) after the installation and adaptation of new prostheses, and (v) after a 3-month follow-up period. At each stage, we evaluated patients via temporal and masseter electromyography (EMG), molar and incisive bite force, and QoL. Results The results for EMG found a decrease in muscle activity during rest, the mastication of raisins, and lateral movements when the overdentures were installed. For the bite force and QoL, there was a gradual improvement from the placement of the healing abutments period (P ˂ 0.05), which was sustained until the follow-up. Conclusions Comfort and stability improved during the treatment, demonstrated by the QoL and bite force results. These results are positive for elderly patients who might refuse an implant-supported overdenture due to treatment length.

Introduction: The use of removable partial denture (RPD) is considered as low-cost and common treatment option to rehabilitate edentulous areas. Aim: This study aimed to investigate the epidemiological data of patients rehabilitated with removable partial denture (RPD) in order to assess treatment survival rate and failures. Materials and Methods: Epidemiological data and medical records of patients treated with RPD between 2007 and 2012 at the RPD discipline of a Brazilian University (Aracatuba Dental School- UNESP) were evaluated as well as dental records of patients who underwent RPD treatments (fabrication or repairs) between 2000 and 2010. Factors such as gender, age, presence of systemic disease, main complaint, edentulous arch, period and cause of denture replacement and the prosthesis characteristics were recorded. The chi-square test was used to assess the differences between the variables and the Kaplan Meyer to assess the survival of the RPDs evaluated. Results: A total of 324 maxillary RPD and 432 mandibular RPD were fabricated. Most of the patients were women aging 41 to 60-year-old. The number of mandibular RPD Kennedy class I (26%) was statistically higher for the maxillary arch (p

Acrylic resin is a widely used material in clinical practice, and a satisfactory biocompatibility is essential. When the resin polymerization reaction is incomplete, residual monomers are released into the oral cavity. The aim of this study was to evaluate, through a literature review, the cytotoxicity caused by the denture base acrylic resin used, and its components. The selection of published studies was performed on the Pubmed database from January 2008 to July 2013. The keywords used were: "cytotoxicity and acrylic resins", "cytotoxicity and denture base resins" and "cytotoxicity and oral prosthesis". Inclusion criteria were: in vitro studies and literature reviews published in English that evaluated the acrylic resin cytotoxicity for denture base and its components. Studies with no reference to the search strategy were excluded. A total of 182 articles were found. Among these, only 13 were included for writing this review. The MTT test is the most common test used to evaluate acrylic resin cytotoxicity. Auto-polymerized resin is more cytotoxic than heat-polymerized resin because of its higher quantity of residual monomers which cause cell and tissue changes in the oral mucosa. However, more studies are necessary for the development of biocompatible materials.

A white female patient presented to the university clinic to obtain implant retained prostheses. She had an edentulous maxillary jaw and presented three teeth with poor prognosis (33, 34 and 43). The alveolar bone and the surrounding tissues were healthy. The patient did not report any relevant medical history contraindicating routine dental treatment or implant surgery, but self-reported a dental history of asymptomatic nocturnal bruxism. The treatment plan was set and two Branemark protocols supported by six implants in each arch were installed after a 6-month healing period. A soft occlusal splint was made due to the patient's history of bruxism, and the lack of its use by the patient resulted in an acrylic fracture. The prosthesis was repaired and the importance of using the occlusal splint was restated. In the 4-year follow-up no fractures were reported.