Gonzalez M, Bell W H, Guerrero C A, Buschang P H, Samchukov M L
Oral Surgeon, Santt Rosa Maxillofacial Surgery Center, Caracas, Venezuela.
Br J Oral Maxillofac Surg. 2001 Jun;39(3):169-78. doi: 10.1054/bjom.2001.0642.
The purpose of this study was to analyse the skeletal changes and stability of the distracted segments during and after simultaneous widening and bilateral lengthening of the mandible in baboons with a miniaturized intraoral bone-borne osteodistractor. Distraction appliances were activated 5 days after vertical posterior body and midsymphyseal osteotomies at a rate of 0.9 mm/day for 10 days. The appliances were then stabilized for a period of 8 weeks, after which the animals were killed. The distraction gaps and gingival tissues were studied clinically and on standardized radiographs. The proportional movement of the distracted segments that we found supports the clinical use of the miniaturized intraoral bone-borne distraction appliance to widen and lengthen the mandible selectively. It also supports the concept of positioning the mandibular osteodistractors parallel to the common vector of distraction, which should parallel the corrected maxillary occlusal plane.
本研究的目的是分析使用小型化口腔内骨支持式骨牵引器对狒狒下颌骨进行同步扩宽和双侧延长过程中及之后牵张节段的骨骼变化和稳定性。在垂直下颌支后缘和正中联合截骨术后5天激活牵引装置，以0.9毫米/天的速度牵引10天。然后将装置固定8周，之后处死动物。对牵张间隙和牙龈组织进行临床研究并拍摄标准化X线片。我们发现的牵张节段的比例性移动支持了小型化口腔内骨支持式牵引装置在临床上选择性地扩宽和延长下颌骨的应用。它还支持将下颌骨骨牵引器平行于牵张共同向量定位的概念，该向量应与矫正后的上颌咬合平面平行。
