Finite element analysis of the influence of crown material on the stress distribution of dental implants
10.13591/j.cnki.kqyx.2024.12.004
- VernacularTitle:冠材料对种植牙应力分布影响的有限元分析
- Author:
Yingying ZHUO
1
;
Jie LIN
;
Ruizhen CHEN
;
Jiyuan SHEN
;
Ling LIN
;
Pingping CAI
;
Zhiqiang ZHENG
Author Information
1. 福建医科大学附属口腔医院特诊科,福建 福州(350001)
- Keywords:
dental implants;
resin-matrix ceramics;
zirconia;
polyether-ether-ketone;
finite element analysis
- From:
STOMATOLOGY
2024;44(12):899-903
- CountryChina
- Language:Chinese
-
Abstract:
Objective To compare the effects of different crown materials on the stress distribution of dental implants by finite ele-ment method.Methods A three-dimensional finite element model of implant-supported crown restoration of the right mandibular first molar was established.Four kinds of crown restoration materials were used,including polymer infiltrated ceramic network Vita Enamic,resin nanoceramic Lava Ultimate,zirconia ceramic Cercon,and polyether-ether-ketone breCAM.A displacement load of 0.01 mm or 200 N was applied to the occlusal surface of the right mandibular first molar,and the analysis of reaction force,the maximum variability of shape,the maximum principal stress,the maximum equivalent stress was performed.Results The results of stress analysis under 0.01 mm displacement load showed that the maximum equivalent stress of Cercon was 937.30 MPa,and that of breCAM was 67.09 MPa.The stress concentration of crowns and implants was obvious.The maximum equivalent stress of the surrounding alveolar bone of Cercon was the highest(26.61 MPa),and that of breCAM was the lowest(3.87 MPa),which was about 1/7 of that of maximum group.The stress concentration range of resin-matrix ceramics and polyether-ether-ketone was relatively small,and the distribution was more uniform.When 200 N was applied,the maximum principal stress and the maximum equivalent stress distribution of the four models were similar,and the maximum variability of shape of breCAM was larger at the loading site.Conclusion Under the same displace-ment load,the stress concentration of polyether-ether-ketone and resin-matrix ceramics crown was lower than that of zirconia.There was no significant difference in stress concentration in the implant and surrounding alveolar bone among polyetheretherketone,resin-ceramic composite,and zirconia crown restorations under the same load.Further research on long-term durability of PEEK and resin-matrix ce-ramicsis needed through practical and clinical trials.
