Fields R T, Cardenas L E, Wolford L M
Baylor College of Dentistry, Dallas, TX, USA.
J Oral Maxillofac Surg. 1997 May;55(5):483-7; discussion 487-8. doi: 10.1016/s0278-2391(97)90697-2.
This study examines the pullout forces and the modes of pullout for the Mitek mini and micro suture anchor systems (Mitek Inc., Norwood, MA) when inserted into the posterior aspect of the condyle.
Twenty mandibular condyles were obtained from embalmed human cadavers. A mini anchor and a smaller micro anchor were threaded with braided size 0 and 3-0 polyester suture, respectively, and placed in the posterior aspect of each condyle. Pullout testing was performed using an Instron materials testing machine. The force and mode of pullout were recorded for each specimen.
The findings indicate a significantly greater mean pullout force of 16.02 lbs for the larger mini anchor system as compared with the 10.57 lbs mean pullout force of the micro anchor system. The modes of pullout between these implants were also different. Intact mini suture anchor systems pulled through the cortical bone in 90% of the trials, and suture breakage occurred in 10%. The micro anchors were irreversibly deformed on pullout in 65% of the trials, whereas the suture broke in 25% of the trials, and the intact suture anchor system pulled through the cortical bone in 10%.
The Mitek mini anchor system has a significantly greater pullout force from the mandibular condyle than the micro anchor system.
本研究检测了Mitek微型和超微型缝合锚钉系统（Mitek公司，马萨诸塞州诺伍德）植入髁突后方时的拔出力及拔出模式。
从防腐处理的人类尸体上获取20个下颌髁突。分别用0号和3-0号编织聚酯缝线穿入一个微型锚钉和一个更小的超微型锚钉，并将它们置于每个髁突的后方。使用英斯特朗材料试验机进行拔出试验。记录每个标本的拔出力和拔出模式。
结果表明，较大的微型锚钉系统平均拔出力为16.02磅，显著高于超微型锚钉系统的平均拔出力10.57磅。这些植入物之间的拔出模式也有所不同。在90%的试验中，完整的微型缝合锚钉系统从皮质骨中穿出，10%的试验中出现缝线断裂。在65%的试验中，超微型锚钉在拔出时发生不可逆变形，25%的试验中缝线断裂，10%的试验中完整的缝合锚钉系统从皮质骨中穿出。
Mitek微型锚钉系统从下颌髁突获得的拔出力显著大于超微型锚钉系统。
Zotero 插件