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OBJECTIVE: To propose the development and validation of criteria for evaluating the clinical performance of indirect restorations, considering the variables related to the operator, material, and/or patient. MATERIALS AND METHODS: The experimental design of this study was divided into three stages. Stage 1: development of the new criteria items by specialists in Prosthodontics. Step 2: creation of the criteria, named UERJ criteria, with the description of the parameters that indicate the quality of the restoration, the possible associated complications, and a detailed description of each classification. As well as the development of a form of variables. Step 3: validation of the UERJ criteria. RESULTS: Cohen's Kappa statistic registered for both intra- and inter-examiner agreements a coefficient >0.91 with a p-value <0.0001. The validity of the UERJ criteria was evaluated by tests of sensitivity (0.96) and specificity (0.91) and had a satisfactory accuracy (92.7%), a positive (10.99), and negative (0.05) likelihood ratio and high values predictive variables, with positive (PPV) 0.84 (high specificity) and negative (VPN) 0.98 (high sensitivity), with a confidence interval of 95%. CONCLUSION: The UERJ criteria is a valid instrument for evaluating the clinical performance of indirect restorations. CLINICAL SIGNIFICANCE: The UERJ criteria, developed exclusively for the analysis of indirect restorations, elucidates the details necessary to identify the causes of failures and complications of these restorations.

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The use of platelet concentrate in alveolar ridge preservation has been broadly studied. However, no randomized clinical trials with histomorphometric analysis and low risk of bias are available in the literature. We conducted a prospective, single-blind, parallel, randomized, controlled clinical trial to evaluate the efficacy of leukocyte- and platelet-rich fibrin (L-PRF) in socket preservation after tooth extraction. Additionally, the effect of L-PRF on bone formation was analyzed histologically using bone biopsy specimens obtained during implant placement. A total of 48 subjects who underwent a non-molar tooth extraction were randomly assigned to the L-PRF group (n = 24) or the control group (n = 24). Cone-beam computed tomographies were performed immediately after tooth extraction and at 3 months after tooth extraction, prior to implant surgery. A significant difference in bone resorption was registered 1 mm below the crest: 0.93 ± 0.9 mm for the L-PRF group and 2.27 ± 1.2 mm for the control group (p = 0.0001). Histomorphometric analysis showed a higher percentage of new bone formation in the L-PRF group compared with the control group. The values were 55.96 ± 11.97% and 39.69 ± 11.13%, respectively (p = 0.00001). These findings indicate that the administration of L-PRF should always be considered when socket preservation is planned (Clinicaltrials.gov NCT03408418).

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O presente estudo teve como objetivo fazer uma avaliação da taxa de sucesso e sobrevivência de restaurações indiretas, realizadas pelo sistema CEREC AC Bluecam após 5 anos. Trata-se de um estudo piloto, com a inclusão de 102 pacientes e um total de 113 restaurações. As restaurações foram feitas a partir de blocos pré-fabricados de cerâmica feldspática (CEREC Blocs). Os prontuários de todos os pacientes foram avaliados. Um total de 36 restaurações foram avaliadas clinicamente usando-se os critérios USPHS e FDI modificados. Além disso, foi criada uma ficha clínica com um questionário abrangendo uma série de informações clínicas relevantes. A taxa de satisfação do paciente foi avaliada através da escala analógica visual. A taxa de sucesso e sobrevivência para as restaurações avaliadas dentro do critério adotado foi de 80,6% e 0,9% respectivamente. Um total de 19 (18,5%) de falhas foi encontrado. A principal razão das falhas foi a fratura da cerâmica, sendo significativamente maior para dentes não vitais. Restaurações indiretas feitas a partir do sistema CEREC AC tiveram um sucesso clínico considerável com taxa de sucesso de 80,6% após 5 anos. A taxa de satisfação dos pacientes frente a esse tipo de tratamento foi bem alta para todos os parâmetros avaliados, chegando a uma média de 96%(AU)

The present study aimed to evaluate the success and survival rate of indirect restorations performed by the CEREC AC Bluecam system after 5 years. This is a pilot study with the inclusion of 102 patients and a total of 113 restorations. The restorations were made from prefabricated feldspar ceramic blocks (CEREC Blocs). The medical records of all patients were evaluated. A total of 36 restorations were clinically evaluated using the modified USPHS and FDI criteria. In addition, a clinical record was created with a questionnaire covering a range of relevant clinical information. Patients' satisfaction rate was assessed using the visual analogue scale. The success and survival rate for the restorations evaluated according to the adopted criteria was 80.6% and 0.9% respectively. A total of 19 (18.5%) failures were found. The main reason for the failures was ceramic fracture, being significantly higher for non vital teeth. Indirect restorations made from the CEREC AC system have had considerable clinical success with a success rate of 80.6% after 5 years. The patients' satisfaction rate regarding this type of treatment was very high for all parameters evaluated, reaching an average of 96%(AU)

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