Implant insertion angle and depth: Peri-implant bone stress analysis by the finite element method.

Autor:	Rito-Macedo F; Assistant Professor of Periodontics, State University of Amazonas (UEA), Manaus, Amazonas, Brazil., Barroso-Oliveira M; Post-Graduation Program in Dentistry, Federal University of Uberlândia (UFU), Uberlândia, MG, Brazil., Paranhos LR; Division of Preventive and Community Dentistry, School of Dentistry dentists, Federal University of Uberlândia (UFU), Uberlândia, MG, Brazil., Rodrigues-Brum J; Assistant Professor of Endodontics, State University of Amazonas (UEA), Manaus, Amazonas, Brazil., Pereira-Lima IF; Department of Oral Pathology, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil., Gomes-França FM; Associate Professor, Faculdade São Leopoldo Mandic, Campinas, São Paulo, Brazil., de Brito-Junior RB; Associate Professor, Faculdade São Leopoldo Mandic, Campinas, São Paulo, Brazil.
Jazyk:	angličtina
Zdroj:	Journal of clinical and experimental dentistry [J Clin Exp Dent] 2021 Dec 01; Vol. 13 (12), pp. e1167-e1173. Date of Electronic Publication: 2021 Dec 01 (Print Publication: 2021).
DOI:	10.4317/jced.58930
Abstrakt:	Background: The study aimed to assess the influence of different implant insertion angles and depths on the stresses produced on the surface of peri-implant bone tissue under axial and oblique loading. Material and Methods: The entire study followed the recommendations of the Checklist for Reporting In-vitro Studies (CRIS). The implant was placed in the region of element 36, according to the following models: M1 (0 mm / 0°); M2 (0 mm / 17°); M3 (0 mm / 30°); M4 (2 mm / 0°); M5 (2 mm / 17°); M6 (2 mm / 30°). The models were subjected to loading, with intensity of 100 N. The stress assessment followed the Mohr-Coulomb criterion and qualitative and quantitative analyses were performed. Results: Angled implants and installed below the bone crest produced the highest stresses on the cortical bone, and the axial load presented the highest stress peaks on the buccal side of implants perpendicular to the bone crest. Regardless of the type of load (axial or oblique), inclined implants presented the highest stress peaks on the lingual side of the cortical bone. Conclusions: Implants installed perpendicular to and with a prosthetic platform at bone crest height provided the lowest stresses to peri-implant bone tissue under both axial and oblique loading. Key words: Finite element analysis, dental implants, axial loading, biomechanical phenomena. Competing Interests: Conflicts of interest None. (Copyright: © 2021 Medicina Oral S.L.)
Databáze:	MEDLINE
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