ABSTRACT
Objective: Produce a French-Canadian translation of AMSTAR 2, affirm its content validity, and examine interrater reliability. Methods: Based on Vallerand's methodological approach, we conducted forward and parallel inverse-translations. Subsequently, an expert panel evaluated the translations to create a preliminary experimental French-Canadian version. A second expert panel examined this version and proposed additional modifications. Twenty future health professionals then rated the second experimental version for ambiguity on a scale (from 1 to 7). The principal co-investigators then reviewed the problematic elements and proposed a pre-official version. To ascertain content validity, a final back-translation was conducted resulting in the official version. Four judges evaluated 13 systematic reviews using the official French-Canadian version of AMSTAR 2. The Kappa coefficient was used to evaluate interrater reliability. Results: This rigorous adaptation enabled the development of a Franco-Canadian version of AMSTAR 2. Its application demonstrated low ambiguity (mean 1.15; SD 0.26) as well as good overall interrater reliability (total κ > 0.64) across all items. Conclusion: The French-Canadian version of AMSTAR 2 can now support francophone clinicians, educators, and managers in Canada as they undertake evidence-based practice.
ABSTRACT
Objective: Considering that the bone stress caused by the internal hexagon implant is lower in comparison with that caused by external hexagon implant, the aim of this study was to evaluate stress distribution of the peri-implant bone, by simulating the influence of the switching platform in external hexagon implants in comparison with regular platform in the internal hexagon implant. Methods: Two mathematical models of an implant-supported central incisor were created: Regular (R), 4.5 x 11.5 mm internal hexagon implant and 4.5 mm abutment and Switching (S), 5.0 x 11.5 mm external hexagon implant and 4.1 mm abutment. The models were created using the SolidWorks 2010 (3Dtech, São Paulo, Brazil) program. Oblique forces (100 N) were applied to the palatine surface of the central incisor. The bone/implant interface was considered perfectly integrated. Maximum and minimum principal stress values were evaluated in the cortical and medullary bones. The numerical analysis was performed using the ANSYS Workbench 10.0 (Swanson Analysis System, Houston, Pa). Results: For the cortical bone, the highest stress values were observed in the R (48.8 MPa), followed by the S (48.5 MPa). For the medullary bone, the highest stress values were observed in the S (3.66 MPa), followed by the regular (1.51 MPa). Conclusion: External hexagon implant with switching platform showed a biomechanical performance similar to that of the internal hexagon implant with regular platform in the cortical bone analysis. Whereas, for the medullary bone, the switching platform model transmitted more stress than the regular model.
Objetivo: Avaliar a distribuição de tensão no osso peri-implantar de implante hexágono interno com plataforma regular e implante hexágono externo com plataforma switching. Métodos: Foram confeccionados dois modelos matemáticos representativos de uma maxila parcial da região do elemento 11, sendo um modelo Regular, com implante hexágono interno (4,5 x 11,5 mm) e pilar 4,5 mm e outro modelo Switching, com implante hexágono externo (5,0 x 11,5 mm) e pilar 4,1 mm. Ambos os modelos continham uma coroa cimentada sobre o pilar do implante. Os modelos foram desenvolvidos pelo programa SolidWorks 2010 (3Dtech, São Paulo, Brasil). Forças oblíquas (100 N) foram aplicadas na face palatal das coroas. A interface osso-implante foi considerada perfeitamente integrada. Máxima e mínima tensão principal foram avaliadas no osso cortical e medular. A análise numérica foi realizada através do programa ANSYS Workbenck 10,0 (Swanson Analysis System, Houston, Pa). Resultados: No osso cortical, os maiores valores de tensão foram observados para R (48,8 MPa), seguido de S (48,5 MPa). Para o osso medular, os maiores valores de tensão foram observados no modelo S (3,66 MPa), seguido por R (1,51 MPa). Conclusão: O modelo switching apresentou comportamento biomecânico semelhante ao modelo de plataforma regular na análise do osso cortical. Enquanto que no osso medular, o modelo switching transmitiu mais tensão óssea do que o modelo Regular.
ABSTRACT
PURPOSE: This study aimed to evaluate stress distribution on peri-implant bone simulating the influence of platform switching in external and internal hexagon implants using three-dimensional finite element analysis. MATERIALS AND METHODS: Four mathematical models of a central incisor supported by an implant were created: External Regular model (ER) with 5.0 mm × 11.5 mm external hexagon implant and 5.0 mm abutment (0% abutment shifting), Internal Regular model (IR) with 4.5 mm × 11.5 mm internal hexagon implant and 4.5 mm abutment (0% abutment shifting), External Switching model (ES) with 5.0 mm × 11.5 mm external hexagon implant and 4.1 mm abutment (18% abutment shifting), and Internal Switching model (IS) with 4.5 mm × 11.5 mm internal hexagon implant and 3.8 mm abutment (15% abutment shifting). The models were created by SolidWorks software. The numerical analysis was performed using ANSYS Workbench. Oblique forces (100 N) were applied to the palatal surface of the central incisor. The maximum (σ(max)) and minimum (σ(min)) principal stress, equivalent von Mises stress (σ(vM)), and maximum principal elastic strain (ε(max)) values were evaluated for the cortical and trabecular bone. RESULTS: For cortical bone, the highest stress values (σ(max) and σ(vm) ) (MPa) were observed in IR (87.4 and 82.3), followed by IS (83.3 and 72.4), ER (82 and 65.1), and ES (56.7 and 51.6). For ε(max), IR showed the highest stress (5.46e-003), followed by IS (5.23e-003), ER (5.22e-003), and ES (3.67e-003). For the trabecular bone, the highest stress values (σ(max)) (MPa) were observed in ER (12.5), followed by IS (12), ES (11.9), and IR (4.95). For σ(vM), the highest stress values (MPa) were observed in IS (9.65), followed by ER (9.3), ES (8.61), and IR (5.62). For ε(max) , ER showed the highest stress (5.5e-003), followed by ES (5.43e-003), IS (3.75e-003), and IR (3.15e-003). CONCLUSION: The influence of platform switching was more evident for cortical bone than for trabecular bone, mainly for the external hexagon implants. In addition, the external hexagon implants showed less stress concentration in the regular and switching platforms in comparison to the internal hexagon implants.
Subject(s)
Dental Implant-Abutment Design/methods , Dental Implants/classification , Finite Element Analysis , Maxilla/anatomy & histology , Biomechanical Phenomena , Computer Simulation , Crowns , Dental Abutments/classification , Dental Porcelain/chemistry , Dental Prosthesis Design , Dental Stress Analysis , Elastic Modulus , Humans , Imaging, Three-Dimensional/methods , Incisor , Materials Testing , Models, Biological , Osseointegration/physiology , Resin Cements/chemistry , Stress, Mechanical , Surface PropertiesABSTRACT
Objetivos: Avaliar a participação feminina nesta especialidade, uma vez que no Brasil, a população feminina na área de Odontologia vem crescendo nos últimos anos. Entretanto, a procura por Cirurgia e Traumatologia Buco-Maxilo-Facial entre as mulheres é pequena. Métodos: Foram enviados questionários a profissionais do gênero feminino na área de odontologia inscritas em 2001 no Colégio Brasileiro de Cirurgia e Traumatologia Buco-Maxilo-Facial por meio dos quais se analisou a atuação feminina na especialidade. A análise estatística foi realizada através do teste Exato de Fisher (α=0,05). Resultados e Conclusão: Observou-se que a afinidade pela área de Buco-Maxilo-Facial é a causa da escolha pela maioria das professoras do gênero feminino; houve influência do fato de possuírem filhos em relação às horas trabalhadas; e há diferenças entre as opiniões dessas profissionais das diversas regiões brasileiras quanto às oportunidades de ascensão na carreira.
