Advanced search
Start date
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Effect of Splinting of Tilted External Hexagon Implants on 3-Unit Implant-Supported Prostheses in the Posterior Maxilla: A 3D Finite Element Analysis

Full text
de Faria Almeida, Daniel A. [1] ; Verri, Fellippo R. [2] ; Lemos, Cleidiel A. A. [3] ; de Souza Batista, Victor E. [4] ; Santiago Junior, Joel F. [5] ; Rosa, Cleber D. D. R. D. [2] ; Noritomi, Pedro Y. [6] ; Pellizzer, Eduardo P. [2]
Total Authors: 8
[1] Univ Fed Alfenas, Alfenas Dent Sch, Alfenas, MG - Brazil
[2] UNESP Univ Estadual Paulista, Aracatuba Dent Sch, Dept Dent Mat & Prosthodont, 1193 Jose Lourenco St Ctr, Aracatuba, SP - Brazil
[3] Fed Univ Juiz de Fora UFJF GV, Dept Dent, Governador Valadares, MG - Brazil
[4] Univ West Sao Paulo UNOESTE, Presidente Prudente Dent Sch, Dept Prosthodont, Presidente Prudente - Brazil
[5] Sagrad Coracao Univ USC, Dept Hlth Sci, Bauru, SP - Brazil
[6] Renato Archers Informat Technol Ctr, Campinas, SP - Brazil
Total Affiliations: 6
Document type: Journal article
Web of Science Citations: 0

Purpose To assess the effects of tilted external hexagon implants and splinted restorations in terms of stress distribution on the bone tissue, implants, and prosthetic screws, using three-dimensional finite element analysis. Materials and Methods Six models were used to simulate a posterior maxilla bone block (type IV) from the first premolar to the first molar. Each model included three 4.1-mm-diameter external hexagon implants with varying inclinations (0 degrees, 17 degrees, and 30 degrees) and crown designs (splinted and nonsplinted restorations). The forces applied were as follows: 400 N axially (50 N for each slope of the cusp) and 200 N obliquely (45 degrees only on the buccal slope of the cusp). Stress distribution on the implants and prosthetic screw was evaluated using Von Mises stress, while the maximum principal stress was used to evaluate the stress distribution in the bone tissue. Results The oblique load increased the stress on all the structures in all the models. Increased inclination of the implants resulted in higher stress concentration in the bone tissue, implants, and prosthetic screws. However, splinted restorations contributed to reduction of the stress for the oblique loading, mainly in the bone tissue and prosthetic screw of the first molar, as the stress was shared between the first and second premolar restorations. Conclusions Tilted implants increased proportionally the stress on bone tissue and prosthetic screws of models. Additionally, splinting restorations reduced the stress concentration area in the simulated bone tissue, implants, and prosthetic screws in the first molar, as the stress was shared with the adjacent implants. (AU)

FAPESP's process: 11/23884-6 - Stress analysis on splinted implant-supported prostheses, with variation of the prosthetic connection and implant inclination. Non-linear three-dimensional finite element study.
Grantee:Daniel Augusto de Faria Almeida
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 09/16164-7 - Influence of crown/implant rate, implant connection and different implant diameter on the stress distribution in single implant-supported prosthesis by means of the tridimesional finite element method
Grantee:Eduardo Piza Pellizzer
Support Opportunities: Regular Research Grants