Three-dimensional finite element analysis of the influence of implant site and axial direction on the immediate weight bearing stress of central incisors in different alveolar fossa shapes
10.13591/j.cnki.kqyx.2023.03.006
- VernacularTitle:植入位点及轴向对不同牙槽窝形态上中切牙即刻种植即刻负重应力影响的三维有限元分析
- Author:
Jun DU
1
;
Zhe WAN
Author Information
1. Department of Stomatology, Traditional Chinese Medical Hospital of Xinjiang Uygur Autonomous Region, Urumuqi 830000, China
- Publication Type:Clinical Trial
- Keywords:
maxillary central incisor;
immediate implant and immediate loading;
implant site and axial direction;
three-dimensional finite element analysis
- From:
STOMATOLOGY
2023;43(3):222-227
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To analyze and investigate the effects of implant location and axial direction on the stress distribution of implants, abutments, central screws, and crowns during immediate loading of maxillary mesial incisors with different alveolar fossa morphology based on three-dimensional finite element method.
Methods:Referring to the oral CBCT images of a healthy adult, a three-dimensional finite element model was established for immediate implant loading of maxillary central incisors with three alveolar fossa morphs: labial, intermediate, and palatal; different implant sites(apical site, palatal/labial site) and axes(tooth long axis, alveolar bone long axis) were simulated; the established model was loaded with a force of 100 N. ANSYS software was applied to analyze the stress values of the implants, abutments, central screwss, and crownss.
Results:The 3D finite element models of 12 maxillary central incisors with different alveolar sockets were successfully established;the implants and their superstructures were least stressed when the maxillary central incisors with partial labial and partial palatal shape were placed along the long axis of the alveolar bone in the palatal/labial position for immediate implant loading;the implants and their superstructures were least stressed when the maxillary central incisors with central shape were placed along the long axis of the tooth in the palatal position for immediate implant loading. The implant and its superstructure were subjected to the least stress when the implant was placed along the long axis of the tooth in the immediate loading position.
Conclusion:The bio-mechanical characteristics of the implant and its superstructure are influenced by the different socket morphology, implantation sites and axes. Therefore, in clinical practice, different implantation axes and implantation sites should be developed for different socket morphs.
