Garfin S R, Lee T Q, Roux R D, Silva F W, Ballock R T, Botte M J, Katz M M, Woo S L
Spine (Phila Pa 1976). 1986 Dec;11(10):977-81. doi: 10.1097/00007632-198612000-00001.
The structural response of the halo orthosis pin-bone interface to transverse loading was evaluated on an Instron testing machine using fresh cadaver calvarium sections. Commercially available stainless steel (control) pins and newly designed stainless steel experimental pins were evaluated. Cyclic loading tests and load-to-failure tests were performed. Of the many designs tested, one pin demonstrated an improvement in structural properties at the pin-bone interface compared with the control pin. Furthermore, the new pin design was more resistant to insertional torque reduction when subjected to cyclic loading after insertions at 4 and 6 in-lb. Both the control and experimental pins exhibited improved structural behavior at 8 in-lb of insertional torque compared to the currently recommended 6 in-lb.
使用新鲜尸体颅骨切片在英斯特朗试验机上评估了头环支具针-骨界面在横向载荷下的结构响应。对市售不锈钢（对照）针和新设计的不锈钢实验针进行了评估。进行了循环加载试验和破坏载荷试验。在测试的众多设计中，有一种针在针-骨界面处的结构性能比对照针有所改善。此外，新的针设计在以4和6英寸磅的扭矩插入后承受循环加载时，更能抵抗插入扭矩的降低。与目前推荐的6英寸磅相比，对照针和实验针在8英寸磅的插入扭矩下均表现出更好的结构性能。
