Rapid orthodontic tooth movement into newly distracted bone after mandibular distraction osteogenesis in a canine model
Rapid orthodontic tooth movement into newly distracted bone after mandibular distraction osteogenesis in a canine model
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DOI：
10.1016/s0889-5406(00)70158-2
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发表时间：
2000-04-01
影响因子：
3
通讯作者：
Polley, JW
中科院分区：
文献类型：
--
作者：
Liou, EJW;Figueroa, AA;Polley, JW
正畸牙齿移动通过最近牵引的纤维骨组织以前没有调查。我们假设牙齿可以快速移动到牵引过程产生的纤维状新骨中。本研究中使用了4只成年比格犬。在2周内通过在第三和第四前磨牙之间的下颌体两侧使用骨载口内牵引装置创建无牙间隙。用50 g的正畸力将第四前磨牙移动到缺牙间隙中，一侧在牵引的同时移动牙齿，另一侧在牵引停止后立即移动牙齿，持续5周。结果表明，正畸牙移动的最佳时机为牵引结束后即刻，正畸牙移动后可保留大部分牙周支持。与此相反，中度至重度牙槽骨的损失，注意到在第四前磨牙移动同时牵引。这是第一个实验研究，以证明成功的快速正畸牙齿移动到一个缺牙区新创建的牵引成骨，这些结果的临床意义，可应用于缓解严重的牙齿拥挤和纠正矢状或横向牙弓的差异。
Orthodontic tooth movement through recently distracted fibrous bone tissue has not been investigated previously. We hypothesized that a tooth can be moved into the fibrous new bone created by the distraction process at a rapid rate. Four mature beagle dogs were used in this study. An edentulous space was created in 2 weeks by using a bone-borne intraoral distraction device on each side of the mandibular body between the third and fourth premolars. Calibrated elastic threads with 50 g of orthodontic force were applied to move the fourth premolar into the edentulous space for 5 weeks, On one side, the tooth was moved simultaneously with distraction; and on the opposite side, it was initiated immediately after the cessation of distraction. The fourth premolars were moved 1.2 mm per week, The results indicated that the best time to initiate tooth movement was immediately after the end of distraction, With this approach, most of the periodontal support was preserved after orthodontic tooth movement. In contrast, moderate to severe alveolar bone loss was noted in the fourth premolars moved simultaneously with distraction. This is one of the first experimental studies to demonstrate successful rapid orthodontic tooth movement into an edentulous space newly created by distraction osteogenesis, Clinical implications of these results may be applied to relieve severe dental crowding and to correct sagittal or transverse dental arch discrepancies.