Haifa, Israel; and Palo Alto, Calif. From the Orthodontic and Craniofacial Center, Rambam Health Care Campus and Technion Faculty of Medicine, and the Craniofacial Anomalies Center, Packard Children's Hospital, Stanford University School of Medicine.
Plast Reconstr Surg. 2010 Jun;125(6):1771-1780. doi: 10.1097/PRS.0b013e3181d9937b.
The mandibular internal curvilinear distractor design produces a curvilinear vector to provide ideal three-dimensional curvilinear movements compared with the limited straight unidirectional predecessor devices. In this manner, it corrects craniofacial deformities as anatomically as possible, allowing simultaneous bidirectional (rotational and translational) mandibular movement and multidirectional distraction. The aim of this study was to quantify the sagittal and vertical mandibular changes achieved through curvilinear distraction and to assess the long-term effect of this generated bone.
Forty patients (20 male and 20 female), with ages ranging from 5 to 55 years, who underwent mandibular distraction from December of 1999 to August of 2007 at Lucile Packard Children's Hospital in Stanford, California, were included. Preoperatively, postoperatively, and at follow-up (at least 2 years following distraction), panoramic and lateral cephalometric radiographs were traced by plotting different skeletal landmark points and were then analyzed.
All patients tolerated the curvilinear distraction process well through completion. The average of the mandibular body elongation recorded was 8 to 9 mm and 6 to 8 mm in the panoramic and cephalometric radiographs, respectively; whereas the vertical change of the mandibular ramus achieved was 10 to 12 mm and 10 to 11 mm, respectively. The curvilinear distraction effect on the mandible was found to be significantly stable when the long-term follow-up measurements were compared with the postoperative data revealed in the panoramic and lateral cephalometric radiographs for the two dimensions.
The internal curvilinear device is an effective tool that achieves a stable mandibular distraction, resulting in the correction of craniofacial deformities.
与有限的直向单向前身设备相比，下颌内部曲线牵开器设计产生曲线向量，以提供理想的三维曲线运动。通过这种方式，它尽可能符合解剖学地矫正颅面畸形，允许同时进行双向（旋转和平移）下颌运动和多方向牵开。本研究的目的是量化通过曲线牵开实现的下颌矢状和垂直变化，并评估由此产生的骨的长期效果。
1999 年 12 月至 2007 年 8 月，在加利福尼亚斯坦福露西尔·帕卡德儿童医院，40 名年龄在 5 至 55 岁之间的患者（男 20 名，女 20 名）接受了下颌骨牵开术。在术前、术后和随访（牵开后至少 2 年）时，通过绘制不同的骨骼标志点来追踪全景和侧位头颅侧位片，并进行分析。
所有患者均顺利耐受曲线牵开过程。下颌体伸长的平均记录值分别为全景片和头颅侧位片上的 8 至 9 毫米和 6 至 8 毫米；而下颌支的垂直变化量分别为 10 至 12 毫米和 10 至 11 毫米。当将长期随访测量值与全景和侧位头颅侧位片上的术后数据进行比较时，发现曲线牵开对下颌的影响非常稳定。
内部曲线装置是一种有效的工具，可实现稳定的下颌牵开，从而矫正颅面畸形。
