CAJ | 학술논문

目的：探讨成人骨性Ⅲ类错牙合畸形患者拔牙矫治后软硬组织变化的相关关系。方法应用回顾性研究方法，选取符合纳入标准的34例成人骨性Ⅲ类错牙合畸形患者，对其头颅侧位片进行测量分析，比较骨性Ⅲ类错牙合畸形患者正畸治疗前后相关测量指标的变化。结果骨性Ⅲ类错牙合畸形患者经过正畸治疗后，上切牙长轴与前颅底平面交角（U1-SN），下切牙长轴与下颌平面角交角（L1-MP）减小，下颌平面角(MP-FH)增大（P＜0.01)；以SL垂直线为参考线，上颌切牙牙冠突度（UI-SL）与上唇突度（UL-SL）减小；下颌牙冠突度（LI-SL）与下唇突度(LL-SL)亦减小，且减小程度大于前者，颏部变化差异无统计学意义；上唇突度的变化(△UL-SL)与上切牙突度变化(△UI-SL)呈正相关，下唇突度的变化(△LL-SL)与上切牙突度变化(△UI-SL)、下切牙突度变化(△LI-SL)均呈正相关，且上唇突度变化与下唇突度变化呈正相关。结论骨性Ⅲ类错牙合畸形患者拔牙矫治后侧貌得到明显改善，软组织与硬组织的变化存在中度相关关系。
목적：탐토성인골성Ⅲ류착아합기형환자발아교치후연경조직변화적상관관계。방법응용회고성연구방법，선취부합납입표준적34례성인골성Ⅲ류착아합기형환자，대기두로측위편진행측량분석，비교골성Ⅲ류착아합기형환자정기치료전후상관측량지표적변화。결과골성Ⅲ류착아합기형환자경과정기치료후，상절아장축여전로저평면교각（U1-SN），하절아장축여하합평면각교각（L1-MP）감소，하합평면각(MP-FH)증대（P＜0.01)；이SL수직선위삼고선，상합절아아관돌도（UI-SL）여상진돌도（UL-SL）감소；하합아관돌도（LI-SL）여하진돌도(LL-SL)역감소，차감소정도대우전자，해부변화차이무통계학의의；상진돌도적변화(△UL-SL)여상절아돌도변화(△UI-SL)정정상관，하진돌도적변화(△LL-SL)여상절아돌도변화(△UI-SL)、하절아돌도변화(△LI-SL)균정정상관，차상진돌도변화여하진돌도변화정정상관。결론골성Ⅲ류착아합기형환자발아교치후측모득도명현개선，연조직여경조직적변화존재중도상관관계。
Objective To investigate the change and correlation between hard-tissue and soft-tissue in patients with class III malocclusion after premolar extraction treatment. Methods Thirty-four adult patients with skeletal classⅢmalocclusion who met the including criteria were included in this retrospective study. The lateral cephalographs were traced and analysed before and after the treatment. Results After orthodontic treatment,the values of long axis of upper incisors and S-N angle (U1-SN) and long axis of lower incisors-mandibular plane (L1-MP) were decreased, and the angle of man-dibular plane (MP-FH) was increased (P<0.01). The SL line was used as a reference, the protrusion of upper incisor (UI-SL) and upper lips (UL-SL) was decreased, and the protrusion of lower incisors (LI-SL) and lower lips (LL-SL) was also de-creased after orthodontic treatment (P<0.05 or P<0.01). There was no significant difference in the relevant measurements of chin. The retraction of upper incisor (△UL-SL) was the only measurement that was positively correlated with upper lip re-traction (△UI-SL). The retraction of upper incisor (△UI-SL) and lower incisor (△LI-SL) were positively correlated with the lower lip retraction (△LL-SL). There was a positive correlation between△UI-SL and△LL-SL. Conclusion The soft-tissue profile improved significantly after four premolars extraction. The change of soft-tissue profile was moderate correlated with hard-tissue.