Oda T, Sawaki Y, Ueda M
Department of Oral and Maxillofacial Surgery, Nagoya University School of Medicine, Japan.
Int J Oral Maxillofac Implants. 2000 Jan-Feb;15(1):95-102.
The purpose of this study was to develop an improved technique of alveolar ridge augmentation by distraction osteogenesis using distraction screws, and to investigate tissue reactions to titanium implants at the distraction site. The left mandibular premolars were extracted from 6 adult dogs. After 12 weeks, a box-shaped osteotomy of the alveolar bone was carried out, and distraction devices were placed on the transport and base segments. After a 7-day latency period, the alveolar bone was augmented by 7 mm vertically at a rate of 1.0 mm/day. Just after distraction, these devices were replaced with dental implants for fixation of the transport segment and bone formation of the distraction site. Histologic and radiographic evaluations were made at 8 and 12 weeks after distraction. Vertical augmentation averaged 6.1 mm after 12 weeks of consolidation. It was possible to lengthen the alveolar bone without great difficulty, and good bone formation was recognized in the distraction site. Greater integration between the implant and the distracted bone was observed at 12 weeks after distraction than at 8 weeks. Distraction osteogenesis was successfully applied to alveolar ridge augmentation by this improved technique, and the implants osseointegrated in the augmented ridge.
本研究的目的是开发一种使用牵引螺钉通过牵张成骨术改善牙槽嵴增高的技术，并研究在牵张部位钛种植体的组织反应。从6只成年犬中拔除左侧下颌前磨牙。12周后，对牙槽骨进行盒形截骨术，并在移动段和基底部放置牵引装置。经过7天的延迟期后，以每天1.0毫米的速度将牙槽骨垂直增高7毫米。牵张完成后，立即将这些装置更换为牙种植体，以固定移动段并促进牵张部位的骨形成。在牵张后8周和12周进行组织学和影像学评估。巩固12周后，垂直增高平均为6.1毫米。在没有很大困难的情况下延长牙槽骨是可行的，并且在牵张部位观察到良好的骨形成。与牵张后8周相比，牵张后12周时种植体与牵张骨之间的整合程度更高。通过这种改进技术，牵张成骨术成功应用于牙槽嵴增高，并且种植体在增高的牙槽嵴中实现了骨整合。
