Department of Orthodontics, Umeå University, Umeå, Sweden.
Angle Orthod. 2010 Nov;80(6):1116-21. doi: 10.2319/012210-46.1.
This pilot study was performed to test the hypothesis that an orthodontic oral appliance (OA) that is designed to work against the backwardly directed forces on the upper incisors may counteract the reduction in overjet from these devices.
Thirty patients with normal bites, good oral health, and milder sleep apnea were randomized to treatment with either OAs or orthodontic OAs. Bite changes were evaluated on plaster casts and radiographs and by questionnaires after a mean of 2.4 years in 19 frequent users.
Four of nine patients in the orthodontic OA group increased their overjet by > or =0.4 mm, while none of the 10 patients in the OA group experienced that effect.
Only the orthodontic OA increases the overjet; this design may therefore be beneficial to patients at risk of negative effects on their bite during OA treatment.
本初步研究旨在验证以下假设,即设计用于抵抗上颌切牙向后作用力的口腔矫正器(OA)可能会抵消这些装置对上颌前突减小的影响。
30 名具有正常咬合、良好口腔健康和轻度睡眠呼吸暂停的患者被随机分为使用 OA 或正畸 OA 治疗的两组。19 名频繁使用者在平均 2.4 年后接受了石膏模型、X 光片和问卷调查,评估了咬合变化。
正畸 OA 组 9 名患者中有 4 名患者的上颌前突增加了>或=0.4 毫米,而 OA 组 10 名患者中没有人出现这种效果。
只有正畸 OA 增加了上颌前突;因此,对于在 OA 治疗过程中存在咬合负面影响风险的患者,这种设计可能是有益的。