Oral Biol Res.  2021 Mar;45(1):7-15. 10.21851/obr.45.01.202103.7.

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

• Lim KO
• Kim KM
• Yang MC
• Kim HJ
• Lee WP
• Kim BO

• KMID: 2514833
• DOI: http://doi.org/10.21851/obr.45.01.202103.7

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.

Keyword

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