A COMPUTER AIDED MEASURING SYSTEM FOR CONTACT PRESSURE DISTRIBUTION IN ARTIFICIAL KNEE JOINT

人工膝关节接触压力分布计算机辅助测量系统

基本信息

批准号：
63870056
负责人：
KAMIYA Akira
金额：
$ 4.67万
依托单位：
RESEARCH INSTITUTE OF APPLIED ELECTRICITY, HOKKAIDO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research
财政年份：
1988
资助国家：
日本
起止时间：
1988 至 1989
项目状态：
已结题

项目摘要

The replacement surgery of artificial knee joint is usually indicated for the severely damaged knee. Although many kinds of artificial knee joints have been developed and utilized in clinical treatment, a reoperation is needed . in some cases to treat such complications as loosening of prosthesis due mainly to technical failure.A microcomputer aided measuring system was newly developed, which allows the measurement of contact pressure distribution in artificial femoro-tibial joint during operation in order to prevent the eccentric load in the knee. The system was composed of a measuring apparatus where twelve pressure sensors are buried in the trial of tibial component and a microcomputer for analyzing pressure and displaying visually the changes in pressure distribution. A knee actuator with another microcomputer system was also designed and developed so as to give. continuously various patterns of both quantitative knee-motion(joint angle) and loading(foot force) to the knee joint as walking, standing up from a chair, stepping up and down the stairs, and so on.By combining the contact pressure measuring system and the knee actuator, the experimental investigations were made using cadaveric knee joints. The results strongly suggested that the conventional method for evaluating success or failure of the replacement of artificial knee using plain roentogenogram has a certain limitation and the dynamic three dimensional evaluation for the positioning of the prostheses presented herein is quite important.Conclusively, the microcomputer aided measuring system appears to be useful and helpful for evaluating the positioning of the prosthesis during replacement surgery.

人造膝关节的替换手术通常用于严重受损的膝盖。尽管已经开发了许多人造膝关节，并用于临床治疗，但仍需要重新手术。在某些情况下，新开发了一个微型计算机辅助测量系统，以治疗主要因技术故障而松开假体的并发症，这允许在手术过程中测量人造股骨 - 屈服关节中的接触压力分布，以防止膝盖的偏心载荷。该系统由测量设备组成，其中将十二个压力传感器埋在胫骨组件的试验和微型计算机的试验中，用于分析压力并视觉显示压力分布的变化。还设计和开发了带有另一个微型计算机系统的膝盖执行器。在步行，从椅子上站立，上下楼梯上，等等，连续地将定量的膝盖运动（关节角）和载荷（脚力）持续各种模式。通过将膝关节膝关节进行实验检查，从而将实验性研究结合在一起。结果强烈表明，使用普通的roentogentogy评估人造膝盖的成功或失败的常规方法具有一定的局限性，并且在本文提出的假体定位的动态三维评估非常重要。确定性地是在评估定位时的有用的测量系统似乎是有用的和有助于评估的定位。