Passivity versus unilateral angular misfit: evaluation of stress distribution on implant-supported single crowns: three-dimensional finite element analysis.
The aim of this study was to evaluate the effect of unilateral angular misfit of 100 μm on stress distribution of implant-supported single crowns with ceramic veneering and gold framework by three-dimensional finite element analysis. Two three-dimensional models representing a maxillary section of premolar region were constructed: group 1 (control)-crown completely adapted to the implant and group 2-crown with unilateral angular misfit of 100 μm. A vertical force of 100 N was applied on 2 centric points of the crown. The von Mises stress was used as an analysis criterion. The stress values and distribution in the main maps (204.4 MPa for group 1 and 205.0 MPa for group 2) and in the other structures (aesthetic veneering, framework, retention screw, implant, and bone tissue) were similar for both groups. The highest stress values were observed between the first and second threads of the retention screw. Considering the bone tissue, the highest stress values were exhibited in the peri-implant cortical bone. The unilateral angular misfit of 100 μm did not influence the stress distribution on the implant-supported prosthesis under static loading.
Department of Dental Materials and Prosthodontics, Araçatuba Dental School, Univ Estadual Paulista, São Paulo, Brazil.
Erica Alves
EA
Gomes
Wirley Gonçalves
WG
Assunção
Valentim Adelino Ricardo
VA
Barão
Juliana Aparecida
JA
Delben
Eduardo Passos
EP
Rocha
Edson Antonio Capello
EA
de Sousa
D001641:Bicuspid; D001696:Biomechanical Phenomena; D003198:Computer Simulation; D003442:Crowns; D000044:Dental Abutments; D015921:Dental Implants; D018772:Dental Marginal Adaptation; D003776:Dental Porcelain / Q000737:chemistry; D017267:Dental Prosthesis Design; D019094:Dental Prosthesis, Implant-Supported; D003801:Dental Veneers; D020342:Finite Element Analysis; D006047:Gold Alloys / Q000737:chemistry; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008437:Maxilla / Q000502:physiology; D016876:Metal Ceramic Alloys / Q000737:chemistry; D008954:Models, Biological; D013314:Stress, Mechanical; D013499:Surface Properties
D015921:Dental Implants; D006047:Gold Alloys; D016876:Metal Ceramic Alloys; D003776:Dental Porcelain