Damage Characteristics of Peri-implant Bones with Varying Densities under Impact and Occlusal Forces
10.16156/j.1004-7220.2025.04.011
- VernacularTitle:冲击及咬合力作用下种植体周围不同密度骨的损伤特征
- Author:
Xinyang MA
1
;
Xiaoou DIAO
;
Bing HOU
;
Xinyue ZHANG
;
Hui ZENG
Author Information
1. 西安医学院口腔医学院,西安 710021;空军军医大学口腔医院,西安 710032
- Publication Type:Journal Article
- Keywords:
impact force;
impact damage;
occlusal force;
implant;
bone damage;
bone density
- From:
Journal of Medical Biomechanics
2025;40(4):872-877
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the damage characteristics of peri-implant bones with varying densities under impact and occlusal forces using numerical simulation.Methods A finite element model of the microstructure of an implant and bones with different densities was established.Impact and occlusal forces were applied sequentially to the implant.A user material subroutine was created for failure judgment using stress-based failure criteria,enabling the analysis of bone damage caused by impact and occlusal forces.Results No cortical bone damage was observed in bones of varying densities under impact force.Damage primarily occurred in the trabecular bone at the base of the implant,with the extent of damage worsening as bone density decreased.Additionally,the number of failed bone elements generated by the damage increased with reduced bone density.Bone tissues with pre-existing impact damage sustained secondary damage when subjected to occlusal force:the bonding interface between the implant and cortical bone was damaged,leading to implant displacement and fracture of peri-implant trabecular bone.The damage caused by occlusal force also worsened as bone density decreased.Conclusions The degree of damage from impact and occlusal forces is correlated with bone density,with damage worsening as bone density decreases.This underscores the protective role of cortical bone.The application of occlusal force exacerbates bone tissue damage,leading to implant displacement when the cortical bone is damaged.In clinical practice,patients with a history of impact damage should undergo thorough examination and evaluation.The occlusal force borne by damaged bones should be reduced;if necessary,the implant should be removed and reinserted after re-establishment of osseointegration.
