Biomechanical variables affect peri-implant bone loss in implant-supported fixed complete dentures: A methodological and prospective study.

Autor:	Seelig da Cunha K; Pontifical Catholic University of Rio Grande do Sul, Post-graduate Program in Dentistry, Porto Alegre, Brazil., De Lima Coltro MP; Pontifical Catholic University of Rio Grande do Sul, Post-graduate Program in Dentistry, Porto Alegre, Brazil., Drummond LG; Private practice, Montenegro, Brazil., Ozkomur A; Lutheran University of Brazil, Post-graduate Program in Dentistry, Canoas, Brazil., Villarinho EA; Pontifical Catholic University of Rio Grande do Sul, Post-graduate Program in Dentistry, Porto Alegre, Brazil., Teixeira ER; Pontifical Catholic University of Rio Grande do Sul, Post-graduate Program in Dentistry, Porto Alegre, Brazil., Vigo Á; Federal University of Rio Grande do Sul, Post-graduate Program in Epidemiology, Porto Alegre, Brazil., Shinkai RSA; Pontifical Catholic University of Rio Grande do Sul, Post-graduate Program in Dentistry, Porto Alegre, Brazil.; University of São Paulo, School of Dentistry, São Paulo, Brazil.
Jazyk:	angličtina
Zdroj:	Journal of prosthodontic research [J Prosthodont Res] 2023 Apr 12; Vol. 67 (2), pp. 173-179. Date of Electronic Publication: 2022 May 26.
DOI:	10.2186/jpr.JPR_D_21_00254
Abstrakt:	Purpose: Implant-supported fixed complete dentures (IFCD) experience failures and complications related to biological and technical risk factors. This study investigated the effect of biomechanical variables of IFCD on 1-year peri-implant bone loss at the buccal, palatal/lingual, mesial, and distal implant sides. A new method was used to measure the geometric biomechanical variables of IFCD using cone beam computed tomography (CBCT). Methods: The study sample consisted of 246 external hexagon implants supporting 48 hybrid IFCD in 44 patients. CBCT images obtained immediately (T0) and 1 year (T1) after prosthesis installation were used to measure the support polygon area, clinical crown/implant (C/I) ratio (vertical lever), anteroposterior power and resistance arms, anterior and posterior cantilevers (horizontal levers), and peri-implant bone remodeling (T1-T0). Data were analyzed using multilevel multivariable models. Results: The average total bone loss in the mandible and maxilla were 0.88 mm, with a loss of 0.62 mm in the mandible and 1.08 mm in the maxilla. The C/I ratio had a significant effect on bone loss on the mesial, distal, and palatal/lingual sides (P <.05). The anterior cantilever had a protective effect on the lingual side of the anterior implant. No effect on bone loss was found for the support polygon area, posterior cantilever, resistance arm, or power arm (P >.05). Conclusions: The results suggest that the C/I ratio and anterior cantilever in IFCD affect peri-implant bone loss according to the implant side and position in the arch.
Databáze:	MEDLINE
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