Komori Ryo, Deguchi Toru, Tomizuka Ryo, Takano-Yamamoto Teruko
Division of Orthodontics, Tohoku University Graduate School of Dentistry, Sendai, Japan.
Orthodontics (Chic.). 2013;14(1):e156-67. doi: 10.11607/ortho.867.
This report describes the use of the miniscrew as orthodontic anchorage in maxillary protrusion with a spaced arch and midline deviation in a 16-year-old female patient. In cases with midline deviation, a cant in the maxillary occlusal plane is often observed. Thus, the authors used the miniscrew to control the vertical dimension, thereby flattening the maxillary occlusal plane, and to close and retract the incisors to improve her convex profile. Effective incisor intrusion to correct the deep overbite was also observed. In addition, functional evaluation by a 6-degrees-of-freedom jaw movement recording system was performed. Significant improvement in the jaw movement was observed during maximum opening and lateral excursion during the retention phase. The authors suggest that miniscrews are effective in correcting midline deviation due to maxillary occlusal cant and intrusion and retraction of incisors, and may result in favorable functional movement of the jaw.
本报告描述了在一名16岁女性患者中，使用微型螺钉作为正畸支抗治疗上颌前突伴牙弓间隙和中线偏移的情况。在中线偏移的病例中，常可见上颌咬合平面倾斜。因此，作者使用微型螺钉控制垂直维度，从而整平上颌咬合平面，并内收和后缩切牙以改善其凸面型。还观察到切牙有效压低以纠正深覆合。此外，通过六自由度颌骨运动记录系统进行了功能评估。在保持期，最大开口和侧方运动时颌骨运动有显著改善。作者认为微型螺钉在纠正上颌咬合平面倾斜导致的中线偏移以及切牙的压低和后缩方面有效，并且可能导致颌骨良好的功能运动。
