Stress Distribution in an Implant-Supported Mandibular Complete Denture Using Different Cantilever Lengths and Occlusal Coating Materials

Author(s)

de Medeiros, Rodrigo Antonio ; Goiato, Marcelo Coelho ; Pesqueira, Aldieris Alves ; Vechiato Filho, Aljomar Jose ; Bonatto, Liliane da Rocha ; dos Santos, Daniela Micheline

• Document type: Journal article
• Source: IMPLANT DENTISTRY; v. 26, n. 1, p. 106-111, FEB 2017.
• Web of Science Citations: 0

Abstract

Purpose: The aim of this study was to assess stress distribution in the bone-implant interface of a mandibular implant-supported prosthesis with different cantilever lengths, aesthetic coating materials, and implant abutments. Materials and Methods: A photoelastic model of an edentulous mandible, containing 5 external hexagon implants, was constructed. Experimental models were divided into 6 groups: group 1-dUCLA component and metal bar; group 2-dUCLA component and acrylic resin coating; group 3-dUCLA component and porcelain coating; group 4-dabutment and metal bar; group 5-dabutment and acrylic resin coating; and group 6-dabutment and porcelain coating. Forces were applied to the most anterior implant, the most posterior implant, and different cantilever lengths. Results: The results showed a higher number of high-stress fringes as the cantilever length increased. Fringes were better distributed in groups with prostheses composed of acrylic resin and in groups that contained an abutment. Conclusion: The stress distribution in the bone-implant interface is improved when the cantilever is eliminated and when abutments in an acrylic resin prosthesis are used. (AU)

• FAPESP's process: 12/11336-7 - Distribution of loads in mandibular implant- supported protheses with different length of cantilever and occlusal coating material
• Grantee: Marcelo Coelho Goiato
• Support Opportunities: Regular Research Grants