The biomechanical analysis on platform switching implants with different planting depth in front maxilla
- VernacularTitle:前牙区平台转换种植体不同种植深度的生物力学分析
- Author:
Qun ying ZHENG
1
;
Qiu yan YANG
2
;
Zhi Bin DU
1
;
Jiang CHEN
1
Author Information
1. Affiliated Stomatological Hospital , Fujian Medical University
2. Department of Stomatology, the First Affliated Hospital of Xiamen University
- Publication Type:Journal Article
- Keywords:
Platform switching;
Implants;
Biomechanics;
Finite element method;
Stress distribution
- From:
Journal of Medical Biomechanics
2010;25(6):E417-E421
- CountryChina
- Language:Chinese
-
Abstract:
Objective In this experiment, the model of Platform Switching Implant was simulated by adopting three dimensional (3D) finite element method and the stress distribution of implants planted in different depth was analyzed when the platform switching implant system was applied with different loading in front maxilla. Method By using the Solidworks 2007 and Ansys Workbench11.0 software to simulate the 3D finite element models,the stress distribution of implants in the form of platform switching as experimental group and traditional abutment as control group which were respectively planted into the level of alveolar ridge(bone level),1 mm below bone level(minus 1) and 2 mm below bone level(minus 2) were analyzed. Results For platform switching implants, the stress of cortical bone was effectively reduced and smaller as the imlpant was planted deeper, while the traditional abutment did not change significantly with deeper planting level.Under vertical loading, the stress distribution in each model’s abutment of platform switching was basically similar, having no significant correlation with the planting depth, while the stress distribution in the traditional abutment had a significant change: gradually trending up with deeper planting level; the stress distribution of two groups of implants in each planting level and cancellous bone was basically similar, having no significant correlation with the planting depth; the stress distribution of cortical bone was shifted down with deeper planting level for platform switching group, while in the traditional abutment group, the stress distribution of cortical bone always focused on the joint between alveolar ridge top and abutment, which was more concentrated than that in platform switching group. The stress distribution under horizontal loading was similar to that under vertical loading,and the only difference was in that the maximum stress distribution of abutment and implant was mainly concentrated in their corresponding labial parts.In cortical bone, the buccal stress was obviously more concentrated than that in the vertical loading group. Conclusions Platform switching implant planted below the alveolar ridge top can improve the stress distribution, which has obvious advantages over the traditional abutment form. But the component force in horizontal direction would increase the stress on the labial part of alveolar ridge, and should be avoided.
