CAJ | 학술논문

目的比较直丝弓矫治器排齐阶段2种远移尖牙的方法即尖牙向后结扎法和弹性链状圈牵引法的优缺点。方法将50例拔除4个第一前磨牙的正畸病例随机分为2组，均使用同种国产直丝弓矫治器，排齐阶段分别采用上述2种方法进行矫治，排齐前后利用模型测量和x线头影测量进行统计学分析。结果上颌前磨牙颊尖之间、下颌磨牙的4个牙尖之间的宽度变小、尖牙牙冠远中倾斜角度、尖牙远中移动距离和速度、下颌磨牙牙冠近中倾斜角度以及上、下切牙的舌向倾斜内收的变化，牵引法均大于结扎法；上、下颌磨牙近中移动距离的变化，牵引法小于结扎法；以上变化均有显著性差异。其余变化2种方法之间未见显著性差异。结论2种方法应用于直丝弓矫治器排齐阶段均取得了远移尖牙的效果，然而，必须采取相应的控制支抗的措施以避免各自的不利影响。
목적비교직사궁교치기배제계단2충원이첨아적방법즉첨아향후결찰법화탄성련상권견인법적우결점。방법장50례발제4개제일전마아적정기병례수궤분위2조，균사용동충국산직사궁교치기，배제계단분별채용상술2충방법진행교치，배제전후이용모형측량화x선두영측량진행통계학분석。결과상합전마아협첨지간、하합마아적4개아첨지간적관도변소、첨아아관원중경사각도、첨아원중이동거리화속도、하합마아아관근중경사각도이급상、하절아적설향경사내수적변화，견인법균대우결찰법；상、하합마아근중이동거리적변화，견인법소우결찰법；이상변화균유현저성차이。기여변화2충방법지간미견현저성차이。결론2충방법응용우직사궁교치기배제계단균취득료원이첨아적효과，연이，필수채취상응적공제지항적조시이피면각자적불리영향。
Objective:To compare the effects of distal movement of canines between elastic traction and canine lace back in the aligning stage of pleadjusted appliance.Methods:50 cases with Angle I malocclusion were divided into two groups after first premolar extraction.Patients in both groups were treated by the same kind of preadjusted appliance in the aligning stage. Canine lace back was used in one group and elastic traction in another.Treatment was countinued for 12 weeks,Measurements of the dental models and the cephalograms were conducted before and after treatment.Results:Compared to the canine lace back,the decrease of the width between the cuspids of upper premolars and that between that of lower molars,the increase of the angle of the distaly tipped canines and the mesially tipped lower molars and the lingually tipped incisors,the higher speed and larger distance 0f dista1 moving canines were achieved more easy with elastic traction. On the contrary,the larger distance of mesial moving molars were attained with canine lace back.The differences of all the measurements above between the two methods were significant(P<0.05or P<0.01).Conclusion:In the aligning stage with pre—adjusted appliance,the two methods of distal moving canines show different speed and outcomes the respective controls to prevent the reverse influences.