Nosaka Yasuhiro, Kobayashi Masaki, Kitano Saki, Komori Takahide
Department of Dentistry and Oral-Maxillofacial Surgery, Kobe Nishi City Hospital, Kobe, Hyogo, Japan.
Int J Oral Maxillofac Implants. 2005 Nov-Dec;20(6):837-42.
This study was designed to evaluate the healing process in horizontal alveolar ridge distraction of the narrow alveolus in dogs.
Six beagle dogs weighing approximately 9 to 10 kg were used in this experiment. Horizontal alveolar ridge distraction was performed in the right mandible, where the premolars had been extracted 12 weeks previously. Twelve days after the completion of distraction, the lengthening apparatus was removed. The distracted site was evaluated at 12 and 24 weeks after the removal.
At 12 weeks, thin woven bone was observed at the distracted site growing from the surface of the original lingual cortical bone toward the transport segment. At 24 weeks, the distracted site had fully changed into new mature lamellar bone, but the transport segments had been almost completely resorbed.
Horizontal alveolar ridge distraction was performed successfully in beagle dogs even though the apparatus was removed 12 days after the completion of distraction. The most important feature of this technique is the resorption of the transport segment.
Horizontal alveolar ridge distraction can be a beneficial technique for augmenting the alveolar ridge horizontally in the buccolingually reduced alveolar process before the placement of implants.
本研究旨在评估犬狭窄牙槽嵴水平向牙槽嵴牵张成骨的愈合过程。
本实验使用6只体重约9至10千克的比格犬。在右侧下颌骨进行水平向牙槽嵴牵张，此处的前磨牙已于12周前拔除。牵张完成12天后，拆除延长装置。在拆除装置后的12周和24周对牵张部位进行评估。
在12周时，在牵张部位观察到薄的编织骨，从原来舌侧皮质骨表面向移动段生长。在24周时，牵张部位已完全转变为新的成熟板层骨，但移动段几乎已完全吸收。
即使在牵张完成12天后拆除装置，比格犬水平向牙槽嵴牵张仍成功进行。该技术最重要的特点是移动段的吸收。
水平向牙槽嵴牵张成骨可能是一种在植入种植体前对颊舌径减小的牙槽突进行水平向牙槽嵴增量的有益技术。
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