Hohoff A, Stamm T, Kaied I, Danesh G, Ehmer U, Joos U
Department of Orthodontics, Muenster University Hospital, Westphalian Wilhelms-University, Muenster, Waldeyerstr. 30, D-48129 Muenster, Germany.
Int J Oral Maxillofac Surg. 2004 Jan;33(1):19-24. doi: 10.1054/ijom.2003.0441.
The diagnostic records of all patients who had undergone Delaire/Joos osteotomy with mandibular setback at the Muenster University Hospital (period 1995-2000, n=22) were used for space management evaluation in the context of combined surgical-orthodontic treatment.Twenty-eight dental spaces were present prior to the start of treatment and 14 were created by extracting teeth as a pretreatment measure. In two patients, unilateral setback was performed according to Obwegeser/Dal Pont. Thus, 42 tooth-bounded spaces were present at the time of Delaire/Joos osteotomy with mandibular setback, most of them in the first molar region, followed by the second premolar region. A significant space reduction was achieved by the surgical intervention, but not by the subsequent orthodontic treatment. The best results with respect to complete space closure by orthognathic surgery/orthodontic treatment without the need for subsequent prosthetic rehabilitation were recorded in the second premolar region. In the absence of spaces and with a similar long-term prognosis for all potentially extractable teeth and adequate space for the necessary surgical repositioning, the second premolars should therefore be regarded as the 'extraction teeth of choice' for mandibular setback within the context of Delaire/Joos osteotomy.
在明斯特大学医院接受Delaire/Joos截骨术并下颌后缩的所有患者（1995年至2000年期间，n = 22）的诊断记录，被用于联合外科正畸治疗背景下的间隙管理评估。治疗开始前存在28个牙间隙，另外有14个间隙是作为预处理措施拔牙后形成的。两名患者根据Obwegeser/Dal Pont方法进行了单侧后缩。因此，在进行Delaire/Joos截骨术并下颌后缩时存在42个牙间隙，其中大部分位于第一磨牙区，其次是第二前磨牙区。手术干预显著减少了间隙，但后续正畸治疗未达到此效果。在第二前磨牙区，正颌手术/正畸治疗实现完全间隙关闭且无需后续修复治疗的效果最佳。因此，在不存在间隙且所有潜在可拔除牙齿的长期预后相似以及有足够空间进行必要的手术复位的情况下，在Delaire/Joos截骨术背景下，第二前磨牙应被视为下颌后缩的“首选拔除牙齿”。
