摘要
目的 探讨拔除不同双尖牙对面部软硬组织的影响。方法 对 10例拔除四个第一双尖牙 (拔 44组 )和10例拔除四个第二双尖牙 (拔 5 5组 )的患者治疗前后的X线头影进行测量分析。结果 拔 44组 :上下切牙突度及上下唇突度明显减少 (P <0 .0 0 1) ;拔 5 5组 :上切牙突度明显减少 (P <0 .0 1) ,下切牙突度及上下唇突度减少不明显 (P >0 .0 5 ) ;两组比较 :上下切牙内收及上下唇内收 ,拔 44组均大于拔 5 5组 (P <0 .0 1)。结论 拔除四个第一双尖牙比拔除四个第二双尖牙产生较多的切牙内收及软组织改变。
Objective The purpose of this study was to compare the hard and soft tissue changes after differential premolar extraction treatment. Methods Pretreatment and posttreatment cephalometric radiographes of 10 cases that had their four first premolars extracted (group44), 10 cases with four second premolars extracted (group55), were analyzed. Results The group44 showed a signifcant decrease(P<0.001) in the distances from 1 to Y, 1 to Y, UL to Y and LL to Y. The group55 showed a significant decrease (P<0.01) in the distance from 1 to Y. 1 to Y, UL to Y and LL to Y showed a slight decrease(P>0.05). Conclusion The incisor retraction and the facial profiles changes in group44 were greater than that in the group55.
出处
《广东牙病防治》
2000年第2期96-97,共2页
Journal of Dental Prevention and Treatment
