RPA卡环支持组织的三维有限元分析  

The 3-Dimensional Finite Element Stress Analysis of the Supporting Tissues in the RPA Clasp

作　　者：蔡玉惠[1] 方赵平[1] 佘颖禾[2] 

机构地区：[1]南京医科大学附属口腔医院修复科,南京210029 [2]东南大学力学教研室,南京210028

出　　处：《南京医科大学学报（自然科学版）》1999年第5期384-386,共3页Journal of Nanjing Medical University(Natural Sciences)

基　　金：江苏省教委科研基金!资助项目 (92 0 77)

摘　　要：目的　研究 RPA卡环在游离端义齿应用中支持组织的应力分布状况。方法　用三维有限元的方法对 RPA卡环和传统三臂卡环修复下颌末端游离缺失时 ,在垂直加载情况下 ,对近基牙支持组织的应力和位移进行分析。结果　 RPA卡环在 3个方向上的最大应力值和位移值均明显小于三臂卡环 ,其基牙受力趋向于轴向力。结论　 RPA卡环有利于基牙的健康 。Objective To study the stres distribution of the supporting tissues of the RPA clasp applied in the free end removable partial dentures. Methods The stress distribution and displacement in the supporting tissues of the abutment tooth was analyzed using the 3 dimensional finite element method under vertical loading on the artificial tooth, to the mandibular unilateral free end partial dentures designed the RPA clasp and traditional three arms clasp. Results The greatest numerical values in the stress and displacement of the RPA clasp is obviously less than those of the three arm clasp in the three directions. The stress state of abutment tends to axial force. Conclusion The RPA clasp is beneficial for the abutment. This survey provides biomechanics basis for its clinical practice.

关 键 词：卡环 有限元 应力 位移 义齿 BPA卡环 

分 类 号：R783.6[医药卫生—口腔医学]