中国实用口腔科杂志 ›› 2011, Vol. 4 ›› Issue (2): 91-93.

• 论著 • 上一篇    下一篇

成人安氏Ⅱ1错牙合畸形矫治前后软硬组织变化的研究

  

  1. 大连大学附属口腔医院正畸科,辽宁  大连  116021
  • 收稿日期:2010-11-24 修回日期:2011-01-28 出版日期:2011-02-15 发布日期:2011-03-18

  • Received:2010-11-24 Revised:2011-01-28 Online:2011-02-15 Published:2011-03-18

摘要:

目的    探讨成人安氏Ⅱ1错牙合畸形矫治前后软硬组织的变化规律,为临床诊疗提供参考。方法    选择2007—2010年大连大学附属口腔医院正畸科收治的20例成人安氏Ⅱ1错牙合畸形患者,拔除4个第一双尖牙,采用MBT直丝弓矫治技术进行正畸治疗。测量术前和术后的头颅侧位片,对治疗前后软硬组织的10个线距、11个角度进行分析,并对测量结果进行统计学分析。结果    矫治完成后,上、下唇突度分别平均减少2.83 mm和3.17 mm(P < 0.05 );上、下颌切牙分别平均内收7.10 mm(P < 0.01 )和3.60 mm(P < 0.05 );上唇厚度平均增加2.90 mm( P < 0.01 );上、下唇相对于审美平面的距离分别平均减小1.30 mm和3.22 mm(P < 0.01 )。ANB角(由上齿槽座点、鼻根点及下齿槽座点所构成的角)平均增加0.75°(P < 0.05),Yaxis角(蝶鞍中心点至颏顶点连线与前颅底平面构成的角)平均增加1.53°(P < 0.01);1-SN(上中切牙长轴与前颅底平面构成的角)、IMPA(下中切牙长轴与下颌平面构成的角)、1-1(上、下中切牙长轴构成的角)和1-MP(下中切牙长轴与下颌平面构成的角)分别平均减小18.61°、6.00°、24.76°和6.38°(P < 0.01),而鼻唇角和唇颏角则分别增加了5.2°和8.35°(P < 0.01 )。随着上、下颌切牙回收,上唇的突度和下唇的突度也随着发生变化(P < 0.01)。上唇厚度、鼻唇角随着上颌切牙的内收而有所增加(P < 0.01)。结论    上、下唇突度的变化与上、下颌切牙的内收程度具有显著的相关性。

关键词:  , 安氏Ⅱ1错牙合, 拔牙矫治, X线头影测量, 软硬组织侧貌

Abstract:

 Objective    To explore the rules of changes of soft and hard tissues in adults with Angle Class Ⅱ1 malocclusion following extraction so as to provide reference for clinical diagnosis and treatment. Methods    The first premolar was extracted in a sample of 20 Class Ⅱ1 adult cases. Cephalograms were measured, and the results were analyzed by SPSS16.0 software. Results    The study showed that upper and lower lip protrusions were decreased by an average of 2.83mm and 3.17mm (P < 0.05), respectively. Maxillary and mandibular incisor tips were retracted by an average of 7.10mm (P < 0.01) and 3.60mm (P < 0.05), respectively. Upper lip thickness was increased by an average of 2.9mm (P < 0.01). The distance of upper labrale and lower labrale to Ricketts esthetic plane was decreased 1.30 mm and 3.22mm (P < 0.01), respectively. ANB and Yaxis angles were increased by an average of 0.75°(P < 0.05) and 1.53°(P < 0.01); 1-SN, IMPA,1-1 and 1-MP angles were decreased by an average of 18.61°,6.00°,24.76°,and 6.38°(P < 0.01),but nasolabial and labiomental angles were increased 5.2°and 8.35°(P < 0.01),respectively. There was significant positive correlation between changes in the maxillary and mandibular incisor and the changes in the upper lip position and lower lip position. Conclusion    A strong correlation exists between anterior tooth retraction and the position of both lips.

Key words: Angle ClassⅡ1malocclusion;extraction;X-ray cephalometric measurement;facial soft and hard fissue profile