Del Valle V, Faulkner G, Wolfaardt J, Rangert B, Tan H K
Department of Mechanical Engineering, Faculty of Engineering, University of Alberta, Edmonton, Canada.
Int J Oral Maxillofac Implants. 1995 Jul-Aug;10(4):491-8.
This study evaluates mechanical behavior of retention systems that have been used in craniofacial osseointegration. A loading/measuring apparatus was custom designed and constructed. Test bases that represented a typical auricular situation were constructed. These bases allowed for three points of retention. Jigs that could be reproducibly positioned carried the reciprocal portion of the retentive components. The test apparatus provided vertical and horizontal loads in five locations. The system was used to test two ball-and-socket attachments (Dalla Bona; Nobelpharma), cast and preformed bar and clips (Nobelpharma), and three magnet systems (Dynamag; Neomag; Technovent). The loading/measuring apparatus was also used to evaluate the performance of two facial prosthetic adhesives. Retention systems employed in craniofacial osseointegration offer more predictable retention than the facial prosthetic adhesives. The mechanical retention systems are best suited to situations where tensile and shear forces will operate. Magnet systems are best used where only tensile forces are anticipated or where horizontal forces on the implants are to be avoided.
本研究评估了用于颅面骨整合的固位系统的力学性能。定制设计并制造了一种加载/测量装置。构建了代表典型耳部情况的测试基座。这些基座允许三点固位。可重复定位的夹具承载固位部件的对应部分。该测试装置在五个位置提供垂直和水平载荷。该系统用于测试两种球窝附件（达拉·博纳；诺贝尔生物）、铸造和预制杆及夹子（诺贝尔生物）以及三种磁体系统（动力磁体；新磁体；技术通风）。加载/测量装置还用于评估两种面部假体粘合剂的性能。颅面骨整合中使用的固位系统比面部假体粘合剂提供更可预测的固位。机械固位系统最适合拉伸和剪切力作用的情况。磁体系统最适用于仅预期有拉伸力或要避免植入物上有水平力的情况。
