Sawaki Y, Ohkubo H, Hibi H, Ueda M
Department of Oral Surgery, Nagoya University, School of Medicine, Japan.
J Oral Maxillofac Surg. 1996 May;54(5):594-600. doi: 10.1016/s0278-2391(96)90640-0.
This study investigated an approach to distraction osteogenesis of the mandible using osseointegrated implants and an intraoral device.
Five adult dogs were used for this experiment. After the extraction of the left mandibular premolar and molar teeth, two osseointegrated implants were placed. Abutment connection, attachment of the intraoral distraction device, and an osteotomy in the region between the implants were performed 3 months after implantation. The distraction was done at rate of 1 mm/day for 10 consecutive days to elongate the mandible 10 mm. The animals were killed 2, 3, and 4 weeks after the distraction was completed, and radiographic and histologic examinations were done.
The longer the time after completion of distraction, the more uniform the new bone that was observed radiographically and histologically in the gap created by the distraction. The titanium implants remained stable during the course of mandibular lengthening.
An intraoral device using osseointegrated dental implants can serve as a mechanism for distraction osteogenesis in the maxillofacial skeleton.
本研究探讨了一种使用骨整合种植体和口内装置进行下颌骨牵张成骨的方法。
本实验使用了5只成年犬。拔除左侧下颌前磨牙和磨牙后，植入两枚骨整合种植体。植入3个月后进行基台连接、口内牵张装置的附着以及种植体之间区域的截骨术。以每天1毫米的速度连续牵张10天，使下颌骨延长10毫米。牵张完成后2、3和4周处死动物，并进行影像学和组织学检查。
牵张完成后时间越长，在牵张形成的间隙中通过影像学和组织学观察到的新骨越均匀。在下颌骨延长过程中钛种植体保持稳定。
使用骨整合牙种植体的口内装置可作为颌面骨骼牵张成骨的一种机制。
