1. Biomechanical variables affect peri-implant bone loss in implant-supported fixed complete dentures: A methodological and prospective study.
- Author
-
Seelig da Cunha K, De Lima Coltro MP, Drummond LG, Ozkomur A, Villarinho EA, Teixeira ER, Vigo Á, and Shinkai RSA
- Subjects
- Humans, Prospective Studies, Dental Prosthesis, Implant-Supported adverse effects, Denture, Complete adverse effects, Mandible, Dental Implants, Alveolar Bone Loss diagnostic imaging, Alveolar Bone Loss etiology
- Abstract
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.
- Published
- 2023
- Full Text
- View/download PDF