Jiyugaoka Orthodontic Clinic, Ono Building 3F, 5-24-10 Okuzawa, Setagaya-ku, Tokyo 158-0083, Japan.
Ginza Orthodontic Clinic, Ginza Granvia 6F, 3-3-14 Ginza, Chuo-ku, Tokyo 104-0061, Japan.
Medicina (Kaunas). 2022 Jan 19;58(2):150. doi: 10.3390/medicina58020150.
We have developed a novel technique, the Jiyugaoka Enjoyable Treatment (JET) system, to complete orthodontic treatment in a short time. It entails the use of the regional acceleratory phenomenon (RAP), light continuous forces and low friction in cases involving extraction. In the JET system, tooth extraction not only creates space, but also triggers the RAP; thus tooth extraction accelerates orthodontic treatment. We describe for the first time how to use the JET system to shorten treatment time in a patient in whom four premolars were extracted. A 15 year old girl patient exhibited an Angle Class I bimaxillary protrusion with moderate crowding in the maxillary (-5.0 mm) and mandibular arches (-3.5 mm). Her facial appearance was slightly asymmetric, and her facial profile was convex. Immediately after the simultaneous extraction of the maxillary first premolars and mandibular second premolars, orthodontic treatment was started with a combination of passive self-ligating brackets and super-elastic nickel-titanium closed coil springs that provided orthodontic forces of less than 50 gf (1.8 ozf). The appliance was adjusted once a month. The total treatment time was 13 months. Cephalometric superimpositions showed a slight anchorage loss, and panoramic radiographs showed a slight apical root resorption but no significant reduction in the crest bone height. At the 3-year 6-month retention follow-up, stability was excellent. The JET system might shorten the orthodontic treatment period without serious anchorage loss or other adverse effects.
我们开发了一种新颖的技术，即调形加速治疗（JET）系统，可在短时间内完成正畸治疗。它涉及在拔牙病例中利用区域性加速现象（RAP）、轻力持续力和低摩擦力。在 JET 系统中，拔牙不仅可以创造空间，还可以触发 RAP；因此，拔牙可以加速正畸治疗。我们首次描述了如何在一名四颗前磨牙被拔除的患者中使用 JET 系统来缩短治疗时间。一名 15 岁的女孩患者表现出安氏 I 类双颌前突伴上颌（-5.0mm）和下颌牙弓中度拥挤（-3.5mm）。她的面部外观略不对称，面型前突。在上颌第一前磨牙和下颌第二前磨牙同期拔除后，立即采用被动自锁托槽和超弹性镍钛闭磁簧弓相结合的方式开始正畸治疗，提供的正畸力小于 50gf（1.8ozf）。每个月调整一次器械。总治疗时间为 13 个月。头影测量叠片显示轻度支抗丧失，全景片显示轻微根尖吸收，但嵴顶骨高度无明显减少。在 3 年 6 个月的保持随访中，稳定性良好。JET 系统可能会在不导致严重支抗丧失或其他不良影响的情况下缩短正畸治疗周期。
