Owman-Moll P, Ingervall B
Am J Orthod. 1984 Jan;85(1):37-46. doi: 10.1016/0002-9416(84)90121-0.
The effect of treatment with an oral screen was studied in sixteen children with incompetent lips who were compared with a control group of sixteen children who also had incompetent lips. The period of observation was 1 year. The treatment brought about retroclination of proclined maxillary incisors with a resulting decrease in overjet, in the diastema between the incisors, and in arch length. The mandibular incisors proclined somewhat. No change in general intermaxillary relation or in arch width was observed with the treatment. Neither lip morphology nor the electromyographically recorded function of the lips was affected by the treatment. The maximum force that the lips could exert to resist an external force was increased substantially by the treatment. Whether this is of value for the stability of the orthodontic treatment result is not known.
对16名唇部功能不全的儿童使用口腔矫治器进行治疗，并与另外16名同样唇部功能不全的儿童组成的对照组进行比较。观察期为1年。治疗使前倾的上颌切牙后倾，从而使覆盖、切牙间间隙和牙弓长度减小。下颌切牙略有前倾。治疗后未观察到颌间关系或牙弓宽度的总体变化。治疗未影响唇部形态或通过肌电图记录的唇部功能。治疗使唇部抵抗外力的最大力量显著增加。这对正畸治疗结果的稳定性是否有价值尚不清楚。
