冠材料对种植牙应力分布影响的有限元分析  

Finite element analysis of the influence of crown material on the stress distribution of dental implants

作　　者：卓盈颖 林捷[1] 陈睿桢 沈纪元 林玲 蔡娉娉 郑志强[1] ZHUO Yingying;LIN Jie;CHEN Ruizhen;SHEN Jiyuan;LIN Ling;CAI Pingping;ZHENG Zhiqiang(Department of VIP Dental Service,School and Hospital of Stomatology,Fujian Medical University,Fuzhou 350001,China)

机构地区：[1]福建医科大学附属口腔医院特诊科,福建福州350001

出　　处：《口腔医学》2024年第12期899-903,共5页Stomatology

基　　金：福建省卫生健康科技计划项目(2022CXA046)。

摘　　要：目的通过有限元方法比较不同冠修复材料对种植牙应力分布的影响。方法建立右下颌第一磨牙种植牙冠修复三维有限元模型。使用4种冠修复材料,即树脂渗透陶瓷Vita Enamic、树脂基纳米陶瓷Lava Ultimate、二氧化锆陶瓷Cercon和聚醚醚酮breCAM,制作冠修复体。在右下颌第一磨牙牙合面施加位移载荷0.01 mm或200 N载荷,对支反力、最大形变量、最大主应力、最大等效应力进行有限元分析。结果应力分析显示,施加位移载荷0.01 mm时最大等效应力Cercon组最高(937.30 MPa),breCAM组最低(67.09 MPa)。冠部修复体及种植体应力集中较为明显,周围牙槽骨最大等效应力Cercon组最高(26.61 MPa),breCAM组最低(3.87 MPa),约为最大组的1/7。树脂陶瓷复合材料及聚醚醚酮材料应力集中范围相对较小,分布更均匀。施加200 N时4种冠材料模型的最大主应力、最大等效应力分布云图相似,最大形变量分布云图中breCAM组的冠部最大形变量在加载处较大。结论在施加相同位移载荷时,聚醚醚酮和树脂陶瓷复合材料冠修复体,比氧化锆在种植体各部件及周围牙槽骨的应力集中程度小;施加相同载荷时,聚醚醚酮、树脂陶瓷复合材料、氧化锆冠修复体在种植体及周围牙槽骨的应力集中区别不明显。聚醚醚酮、树脂陶瓷复合材料的长期耐久性还需实测实验和临床试验进一步研究。Objective To compare the effects of different crown materials on the stress distribution of dental implants by finite element 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 displacement 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 ceramicsis needed through practical and clinical trials.

关 键 词：种植牙 树脂陶瓷复合材料 氧化锆 聚醚醚酮 有限元 

分 类 号：R783.4[医药卫生—口腔医学]