ABSTRACT
The aim of this study was to evaluate the mechanical behavior of UCLA and Mini-conical abutments for implants with Tri-channel connections regarding torque loss and vertical misfit. Twenty 3-element metal-ceramic fixed partial dentures (FPD) supported by 2 implants were manufactured and divided into 2 groups (n = 10): UCLA (group 1) and Mini-conical Abutments (group 2). The evaluation of torque loss was carried out before and after mechanical cycling, while the vertical fit was evaluated throughout the different stages of manufacturing the prostheses, as well pre- and postcycling (300,000 cycles, 30 N). Statistical analyses of torque loss and vertical misfit were performed using the linear mixed effects model. Both groups showed torque loss after mechanical cycling (P < .05); however, there was no significant percentage differences between them (P = .795). Before cycling, the groups showed a significant difference in terms of vertical misfit values (P < .05); however, this difference was no long observed after cycling (P = .894). Both groups showed torque loss after the cycling test, with no significant difference (P > .05). There was no significant difference in vertical misfit after mechanical cycling; however, in group 1 (UCLA) there was accommodation of the implant-UCLA abutment interface, while group 2 (Mini-conical abutment) did not show changes in the interface with the implant after the test. Both groups behaved similarly regarding the torque loss of the prosthesis retention screws pre- and postmechanical cycling, with greater loss after the test.
Subject(s)
Dental Implants , Torque , Dental Abutments , Dental Stress Analysis , Dental Prosthesis Retention , Dental Implant-Abutment DesignABSTRACT
Objetivo: O trabalho verificou a qualidade de luvas de látex de procedimento de cinco marcas comerciais utilizadas na prática clínica. Material e Métodos: Foram realizados os testes de Inspeção Visual (IV) e de Integridade (TI) em luvas de procedimento a fim de detectar possíveis defeitos de fabricação. Foram avaliadas 1007 luvas de procedimento (duas caixas tamanho M de cada fabricante). Resultados: Do total, 3,87% apresentaram problemas no teste IV e 1,96% no TI. A marca SATARI® obteve melhor desempenho no teste IV, enquanto a SUPERMAX® o pior. A marca DESCARPACK® obteve o melhor desempenho no TI e a EMBRAMAC® o pior. Conclusão: No quesito hermeticidade, em comparação com o nível de qualidade aceitável, imposto pelo INMETRO, as marcas EMBRAMAC® e LEMGRUBER® foram reprovadas.
Objective: The objective of this study was to verify the quality of latex procedure gloves of 5 trademarks used in clinical practice. Material and Methods: Visual Inspection (VI) and Integrity (IT) tests were performed in procedure gloves in order to detect possible manufacture defects. A number of 1007 procedure gloves (2 packages M size of each manufacturer) were evaluated. Results: In general, 3,87% showed defects in the VI test and 1,98% in the IT. The brand SATARI® had the best performance in the VI test, whereas the brand SUPERMAX® had the worst. Conclusion: The make DESCARPACK® had the best performance in the IT and the brand EMBRAMAC® had the worst. In the hermeticity aspect, in comparison to the acceptable quality level imposed by INMETRO, the brands EMBRAMAC® and LEMGRUBER® were reproved.
