“锚定法”单开门椎管成形术锚定钉植入技术的拔出强度研究

Pull-out strength in open door laminoplasty by using "anchoring method" of different screw implant techniques

目的：评价锚定法中不同植钉方法的拔出力及拔出强度。方法：选取3具新鲜羊颈椎标本（C3～C7，应用侧块螺钉Roy--Camille法，Magerl法，自设计螺钉植入法，选取直径3．5mm，长度10mm的皮质骨螺钉，打通单层皮质，拔出角度与冠状面成40。，测试其最大拔出力，拔出强度。结果：Magerl法的最大拔出力大于Roy--Camille法，二者有显著差别。二者在拔出强度方面无显著差别，自设计法较Roy-Camille法与Magerl法在最大拔出力及拔出强度方面均有显著增加。结论：自设计螺钉植入法抗拔出能力高且更安全。

Objective： To evaluate the pull--out strength in open door laminoplasty by using anchoring method of different screw implant techniques. Methods：Three fresh sheep cervical spine samples （C3-C7） were implanted with screws by using lateral mass screw Roy- Camille technique, Magerl technique and self--de- sighed new technique. The maximum pull--out strength and force were tested. Results：The maximum pull- out strength and force of the Margel technique were larger than those of the Roy--Camille technique and those of the self--designed new technique showed the largest. Conclusion：The pull--out strength and force of the self --designed new technique are larger than those of the traditional techniques, and the new technique was much safer.