Different combinations of CAD/CAM materials on the biomechanical behavior of a two-piece prosthetic solution

Author(s)

Mendes Tribst, Joao Paulo ^[1] ; de Oliveira Dal Piva, Amanda Maria ^[1] ; Souto Borges, Alexandre Luiz ^[1] ; Bottino, Marco Antonio ^[1]

Affiliation

^[1] Sao Paulo State Univ Unesp, Inst Sci & Technol, Dept Dent Mat & Prosthodont, Sao Jose Dos Campos, SP - Brazil

• Document type: Journal article
• Source: INTERNATIONAL JOURNAL OF COMPUTERIZED DENTISTRY; v. 22, n. 2, p. 171-176, SUM 2019.
• Web of Science Citations: 0

Abstract

Aim: This study evaluated the stress distribution of implant-supported prostheses, varying the different combinations of computer-aided design/computer-aided manufacturing (CAD/CAM) materials between the hybrid abutment and the monolithic crown by three-dimensional (3D) finite element analysis (FEA). Materials and methods: Nine models were designed with Rhinoceros 3D and Ansys software. Each model contained a bone block of the molar area, including an implant (IH; empty set 3.75 x 11 mm) supporting a hybrid abutment (ceramic mesostructure (MS) cemented onto a titanium {[}Ti] base) and a monolithic crown. The occlusal load was applied to the fossa bottom (300 N; 30 degrees). The results were analyzed using the von Mises stress for each separated prosthetic structure and microstrain for the bone tissue. Result: Von Mises maps of the crown, ceramic MS, implant, screw, and cement layers showed a decreased stress concentration as the elastic modulus (E modulus) of the ceramic crown (CR) associated with a rigid ceramic MS decreased. No differences in bone tissue regarding microstrain were observed. Conclusion: Implant-supported crowns present less stress concentration when a rigid abutment is associated with resilient crowns. (AU)

• FAPESP's process: 17/23059-1 - Behavior of different rehabilitations with ceramic materials under mechanical fatigue
• Grantee: Marco Antonio Bottino
• Support Opportunities: Regular Research Grants
• FAPESP's process: 17/09104-4 - Biomechanical behavior and survival of implant-supported hybrid ceramic crowns manufactured by different techniques
• Grantee: João Paulo Mendes Tribst
• Support Opportunities: Scholarships in Brazil - Doctorate