论文部分内容阅读
目的探讨Damon自锁矫治器非拔牙矫治后牙列拥挤的软组织变化,为预测矫治后的软组织侧貌提供临床依据。方法选择2007年3月至2008年3月于青岛大学医学院附属医院口腔正畸科门诊因错畸形就诊的牙列拥挤患者15例,采用DamonMX或DamonⅢ自锁矫治器进行非拔牙矫治,矫治前后进行X线头影测量,比较矫治前后上唇倾角、颏唇沟角、面角、Z角和面突角的变化。结果15例患者经过平均16个月的矫治后,牙弓内无间隙或拥挤存在;上下颌牙列排齐整平;磨牙关系及前牙覆覆盖关系正常;牙齿位置及咬合关系精细调整至正常。矫治后上唇倾角和面突角均较矫治前略增大,而颏唇沟角、面角和Z角均较矫治前略减小,但各测量指标矫治前后的差异均无统计学意义(P>0.05)。结论应用Damon自锁矫治技术进行非拔牙矫治,不会使患者面部软组织发生明显的前突。
Objective To investigate the soft tissue changes of dentition crowding after Damon self-locking appliance non-extraction treatment, and to provide a clinical basis for predicting the soft tissue profile after correction. Methods From March 2007 to March 2008, 15 patients with crowded dentition treated by Orthodontics Clinic of Affiliated Hospital of Qingdao University Medical College were treated with DamonMX or Damon Ⅲ self-locking appliance for non-extraction treatment. Before and after X-ray cephalometric measurements were compared before and after correction of upper lip inclination, chin and lip groove angle, angle, Z angle and surface angle of change. Results After 15 months of treatment, the average length of the dental arch was 15 mm. There was no gap or crowding in the dental arch. The dentition alignment of upper and lower jaws was normal. The relationship between molars and anterior cover was normal. The position and occlusion of teeth were finely adjusted to normal . After correction, the inclination of upper lip and facial protrusion were slightly larger than those before correction, while the groove angle, facial angle and Z angle of the chin and lip were slightly reduced compared with before treatment, but there was no significant difference between before and after treatment (P> 0.05 ). Conclusion Damon self-locking correction technique for non-extraction treatment does not make the patient’s facial soft tissue obvious protrusion.