Effect of cantilever length and alloy framework on the stress distribution in peri-implant area of cantilevered implant-supported fixed partial dentures

Autor(es)

Suedam, Valdey ^[1] ; Moretti Neto, Rafael Tobias ^[2] ; Capello Sousa, Edson Antonio ^[3] ; Rubo, Jose Henrique ^[4]

Afiliação do(s) autor(es)

^[1] Univ Sagrado Coracao, Fac Odontol, Bauru, SP - Brazil

^[2] Univ Fed Alfenas, Fac Odontol, Dept Clin & Cirurgia, Alfenas, MG - Brazil

^[3] Univ Estadual Paulista, Fac Engn, Dept Engn Mecan, Bauru, SP - Brazil

^[4] Univ Sao Paulo, Fac Odontol Bauru, Dept Protese, Bauru, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Applied Oral Science; v. 24, n. 2, p. 114-120, MAR-APR 2016.
• Citações Web of Science: 1

Resumo

ABSTRACT Because many mechanical variables are present in the oral cavity, the proper load transfer between the prosthesis and the bone is important for treatment planning and for the longevity of the implant-supported fixed partial denture. Objectives To verify the stress generated on the peri-implant area of cantilevered implant-supported fixed partial dentures and the potential effects of such variable. Material and Methods A U-shaped polyurethane model simulating the mandibular bone containing two implants (Ø 3.75 mm) was used. Six groups were formed according to the alloy’s framework (CoCr or PdAg) and the point of load application (5 mm, 10 mm and 15 mm of cantilever arm). A 300 N load was applied in pre-determined reference points. The tension generated on the mesial, lingual, distal and buccal sides of the peri-implant regions was assessed using strain gauges. Results Two-way ANOVA and Tukey statistical tests were applied showing significant differences (p<0.05) between the groups. Pearson correlation test (p<0.05) was applied showing positive correlations between the increase of the cantilever arm and the deformation of the peri-implant area. Conclusions This report demonstrated the CoCr alloy shows larger compression values compared to the PdAg alloy for the same distances of cantilever. The point of load application influences the deformation on the peri-implant area, increasing in accordance with the increase of the lever arm. (AU)

• Processo FAPESP: 99/01402-6 - Analise do estresse gerado em componentes de proteses fixas implanto-suportadas atraves do uso de extensometros e elementos finitos.
• Beneficiário: José Henrique Rubo
• Modalidade de apoio: Auxílio à Pesquisa - Regular