Kuroda Shingo, Hichijo Natsuko, Sato Minami, Mino Akiko, Tamamura Nagato, Iwata Mitsuhiro, Tanaka Eiji
Associate professor, Department of Orthodontics and Dentofacial Orthopedics, Institute of Biomedical Sciences, Graduate School, Tokushima University, Tokushima, Japan.
Postgraduate student, Department of Orthodontics and Dentofacial Orthopedics, Graduate School of Oral Sciences, Tokushima University, Tokushima, Japan.
Am J Orthod Dentofacial Orthop. 2016 Jun;149(6):912-22. doi: 10.1016/j.ajodo.2015.07.045.
We successfully treated a Class II Division 2 patient with maxillary group distalization using interradicular miniscrews. A woman, aged 28 years 11 months, had a convex profile and an excessive overjet caused by a skeletal Class II jaw-base relationship. After leveling and alignment, titanium miniscrews were obliquely implanted between the maxillary second premolar and first molar. To distalize the maxillary dentition, nickel-titanium closing coil springs with a 2-N load were placed between the screws and the hooks on the archwire. After 28 months of active orthodontic treatment, a proper facial profile and an acceptable occlusion were achieved with a 4-mm distalization of the maxillary dentition. The resultant occlusion was stable throughout a 5-year retention period. Interradicular miniscrews were useful to distalize the maxillary dentition for correcting a Class II malocclusion. This new strategy, group distalization with miniscrews, can make the treatment simpler with greater predictability.
我们使用根间微型螺钉成功治疗了一名II类2分类患者的上颌牙列远中移动。一名28岁11个月的女性，因骨骼II类颌骨基骨关系导致凸面型和前牙深覆盖。排齐整平后，在上颌第二前磨牙和第一磨牙之间斜向植入钛微型螺钉。为使上颌牙列远中移动，在螺钉和弓丝上的牵引钩之间放置2N力的镍钛闭合曲弹簧。经过28个月的主动正畸治疗，上颌牙列远中移动4mm，获得了正常的面部外形和可接受的咬合关系。在5年的保持期内，最终的咬合关系稳定。根间微型螺钉有助于上颌牙列远中移动以纠正II类错牙合。这种新策略，即微型螺钉辅助牙列远中移动，可使治疗更简单且具有更高的可预测性。
