Department of Oral and Maxillofacial Surgery, Ninth People's Hospital, Shanghai JiaoTong University, School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai, China.
Clin Oral Implants Res. 2013 Jul;24(7):826-30. doi: 10.1111/j.1600-0501.2012.02466.x. Epub 2012 Apr 4.
Dental implant distractors (DID) are an efficacious means of simultaneously augmenting the vertical bony height together with the installation of dental implants. Little is known about their biomechanical properties and osteointegration ability in the free fibula flap, where the periosteum is invariably damaged during the multiple osteotomies required for contouring purposes.
Twenty-four DID devices inserted into the tibias of 12 goats were evenly divided into three groups - whole periosteum (WP), half periosteum (HP), no periosteum (NP). Following 10 days of distraction and a 12 week consolidation period, the animals were euthanized to retrieve all 12 tibias. The bone-implant bonded percentage (BIBP) and removal torques (RTQ) of each fixture were determined and statistically compared across the various groups.
A slight decrease in both BIBP and RTQ values was observed across the WP, HP, and NP groups, respectively, with statistically significant differences in the BIBP for the WP and NP groups only.
We conclude that although an intact periosteum is ideal for the osteointegration of the DID fixture, adequate stability can still be achieved due to the sufficient anchorage accorded by the base screws in the apical cortex.
牙种植体牵张器（DID）是一种同时增加垂直骨高度并安装牙种植体的有效方法。关于其在游离腓骨瓣中的生物力学特性和骨整合能力知之甚少，因为在为整形目的进行的多次截骨术中，骨膜总是会受损。
将 24 个 DID 装置插入 12 只山羊的胫骨中，平均分为三组-完整骨膜（WP）、半骨膜（HP）、无骨膜（NP）。牵张 10 天后，进行 12 周的巩固期，然后处死动物以取出所有 12 根胫骨。测定每个固定器的骨-种植体结合百分比（BIBP）和去除扭矩（RTQ），并在各组之间进行统计学比较。
WP、HP 和 NP 组的 BIBP 和 RTQ 值均略有下降，仅 WP 和 NP 组的 BIBP 值有统计学差异。
我们得出结论，尽管完整的骨膜有利于 DID 固定器的骨整合，但由于根尖皮质中的基螺钉提供了足够的锚固，仍可以获得足够的稳定性。
