【摘要】 有限元的应力分析已广泛应用于口腔医学领域。本文综述了有限元对全瓷冠、桩冠、固定义齿和种植固定义齿的应力分析,研究其应力分布规律,为口腔修复体设计和制作提供理论依据。结果表明:全瓷冠和桩冠的颈部有拉应力和压应力集中;固定义齿的应力集中在桥体与固位体连接体处,磨牙是固定义齿的理想基牙;种植固定义齿最大应力集中在种植体的颈部。建议口腔临床医师应注意使修复体牙合力分散,并去除侧向外力对基牙造成的损害。更多还原

【Abstract】 Finite element stress analysis has been widely used in stomatology. In this article,we summarized the stress distributions of all-ceramic crowns, post crowns,fixed partial dentures and implant support fixed dentures;and with the use of finite element method,we investigated the stress levels of the periodontal ligament of abutment.The results showed: the tensile stress and compressive stress concentrated at the cervical margin of all-ceramic crown and post crown;the stress at the surface of the crown was the highest;the stress concentration exhibited at the connector of fixed parital denture,the molar was an ideal abutment tooth for the fixed bridge;the largest stress appeared around the neck of the implant abutment.These results have provided a theoretical basis for clinical dentistry in terms of restoration design and manufacture.It is suggested that clinical dentists should be careful to avoid the horizontal laoding applied on the prostheses so as to improve the resistance of abutment tooth to fracture.更多还原