论文部分内容阅读
研究证明使用唇档后,下切牙平均扩张1.5mm,唇的压力也明显下降至低于初始值。作者已经研究过模拟下颌扩弓1周内唇颊静压的变化,结果表明,中线处压力在增高后有所下降但不明显,下尖牙处增高的压力在1周内无显著变化。本研究在以前研究的基础上继续观察6个月,以获得更长期全面的结果。 材料和方法 受试者包括男性10例,女性12例,年龄20～30岁。入选标准如下:①健康状况良好,无颅面畸形和语言障碍,②未使用影响肌张力的药物,③近5年内未接受正畸治疗,④无牙体、牙周疾病,⑤Ⅰ类(牙合)关系和骨骼关系,⑥无影响唇压力的不良习惯。为每位
Studies have shown that the use of lip files, the average incision of lower incisors 1.5mm, lip pressure also dropped significantly below the initial value. The authors have studied the change of labial buccal pressure simulating the mandibular expansion within one week. The results showed that the pressure at the midline decreased somewhat but not obviously, while the pressure at the lower canine had no significant change within one week. Based on previous studies, we continued to observe for 6 months to obtain more comprehensive and long-term results. Materials and Methods Subjects included 10 males and 12 females, aged 20-30 years. The criteria for inclusion were as follows: ① good health, no craniofacial deformity and speech impairment, ② unused medications that affected muscle tone, ③ no orthodontic treatment within 5 years, ④ no tooth, periodontal disease, ⑤ type I ) Relationship and bone relationship, ⑥ no bad habits affect the lip pressure. For each one