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Finite element analysis of stress distribution around a short implant according to a horizontally reduced bone in the mandible

Oral Biology Research 2021년 45권 1호 p.7 ~ 15
Lim Kyeong-Ok, 김경민, 양민철, 김희중, 이원표, 김병옥,
소속 상세정보
 ( Lim Kyeong-Ok ) - Chosun University School of Dentistry Department of Periodontology
김경민 ( Kim Kyung-Min ) - Chosun University School of Dentistry Department of Periodontology
양민철 ( Yang Min-Cheol ) - Woori Dental Office Dental Clinic
김희중 ( Kim Hee-Jung ) - Chosun University School of Dentistry Department of Prosthodontics
이원표 ( Lee Won-Pyo ) - Chosun University School of Dentistry Department of Periodontology
김병옥 ( Kim Byung-Ock ) - Chosun University School of Dentistry Department of Periodontology

Abstract


This study evaluates the stress distribution around a short implant supporting a bone with various horizontally reduced levels using a three-dimensional finite element stress analysis. A three-dimensional finite element model was designed by placing a short implant in a jaw model with a 2-mm-thick cortical bone. Horizontal bone loss was employed at 1-mm intervals from 0 to 3 mm, and a 400- N load was applied to the central fossa in a 0° vertical direction and 30° inward-inclined direction to the implant axis. Furthermore, the maximum principal stress generated in the short implant supporting the bone was calculated using a three-dimensional finite element stress analysis. As a result of the finite element analysis, the maximum principal stresses in a 0° vertical direction according to horizontal bone loss from 1 mm to 3 mm in the cortical bone were 45.13, 79.44, and 75.53 (MPa), respectively, and in the cancellous bone were 7.63, 9.28, and 9.60 (MPa), respectively. The maximum principal stresses in a 30° inward-inclined direction according to horizontal bone loss from 1 mm to 3 mm in the cortical bone were 132.34, 172.07, and 216.26 (MPa), respectively, and in the cancellous bone were 16.34, 27.43, and 26.37 (MPa), respectively. Within the limitations of this study, the authors concluded that the bone stress values tended to be higher around the implant neck under a 30° inward load and in the cortical bone according to the horizontally reduced bone level.

키워드

Bone and bones; Dental implant; Dental stress analysis; Finite element analysis

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