Biomechanical Properties of Implants with Different Thread Shapes and Depths in Dental Immediate Implantation
10.16156/j.1004-7220.2020.01.19
- VernacularTitle:牙科即刻种植中不同螺纹形态及深度设计参数种植体的生物力学性能
- Author:
Yulin ZHOU
1
;
Zhihong MAO
1
;
Qiongyao WANG
1
;
Li JIANG
1
Author Information
1. Division of Intelligent Manufacturing, Wuyi University
- Publication Type:Journal Article
- Keywords:
dental implant;
thread shape;
thread depth;
finite element analysis
- From:
Journal of Medical Biomechanics
2020;35(1):E095-E100
- CountryChina
- Language:Chinese
-
Abstract:
Objective To analyze stress distributions of alveolar bone around implants with different types of implant thread shapes and thread depths during dental immediate implantation, so as to provide references for the design and selection of implants. Methods The simplified model of mandible bone block, implants and mandibular molar were established by Geomagic Studio, SolidWorks and ANSYS Workbench, and vertical and oblique loads were applied on this model, respectively. Stress distributions on implants with different thread shape and thread depth as well as alveolar bone around implants were calculated. Results Under vertical loading, the peak stresses of implants, cortical bone and cancellous bone were in the range of 120.51-129.63 MPa, 9.94-13.25 MPa and 3.92-8.01 MPa, respectively. And the stress of cortical bone around V-shaped, rectangular, buttress or reverse buttress implant remained stable in the range of 0.40-0.45 mm thread depth. Under oblique loading, the peak stresses of implants, cortical bone and cancellous bone were in the range of 220.23-286.51 MPa, 33.39-45.08 MPa, 4.96-12.5 MPa, respectively. Among the models, V-shaped, buttress, reverse buttress implant with 0.45 mm thread depth showed the minimum stress. Conclusions The V-shaped, buttress or reverse buttress implant with a thread depth of 0.45 mm, or the rectangular implant with a thread depth of 0.40 mm had better biomechanical properties.
