Initial experimental study of implant-distraction apparatus / 实用口腔医学杂志

ABSTRACT

Objective: To observe the effect of distraction osteogenesis and synostosis following the placement of implant-distraction apparatus. Methods: The bilateral premolars were extracted in six adult hybrid dogs. After twelve weeks, a box-shaped osteotomy on the random side of the alveolar bone was carried out and two implant-distraction apparatus were placed. After one week, the alveolar ridge was vertically augmented at 1.05 mm/d by distraction for four days. Following 6-week-fixation histological and radiographical evaluations were carried out. Results: All dental implant-distraction apparatus obtained good healing except one failed for inflammation and was removed. The alveolar ridge was vertically augmented 4. 00 mm on average. The radiolucency in the distraction site disappeared in 6 weeks. Histologically, the lengthened bone consisted of mature lamellar and canellous bone, and good synostosis was obtained. The transport bone segment was vertical- ly augmented 4.2 mm, the maximum augmentation was 5 mm. Conclusions: The dental implant-distraction apparatus may be used for vertical augmentation of the alveolar ridge.