CAJ | 학술논문

目的评价正畸减数第一磨牙的临床疗效,并就减数第一磨牙的相关矫治原则、间隙关闭情况及第三磨牙的建(牙合)等问题进行初步探讨.方法选取我科近10年完成的14例减数第一磨牙矫治病例进行分析.通过对矫治前后模型的PAR指数和头颅侧位片,对矫治后磨牙间隙关闭、咬合关系及软组织侧貌进行评价;并通过曲面断层片,初步评价第二磨牙的牙根吸收和牙槽骨的改建以及第二磨牙和前磨牙的牙根平行状况.结果 14例患者平均疗程(29.5±4.3)个月,PAR疗效分析显示治疗后变差或无改变0例,改善5例,明显改善9例,提示拔牙间隙关闭满意,牙(牙合)关系良好;软组织侧貌协调,面型满意;曲面断层片显示第二前磨牙与第二磨牙牙根平行状况良好,第二磨牙牙根及牙槽骨无明显吸收.结论减数第一磨牙病例只要严格把握适应证,合理的支抗设计和严谨的临床操作,可以获得满意的临床矫治效果.
목적 평개정기감수제일마아적림상료효,병취감수제일마아적상관교치원칙、간극관폐정황급제삼마아적건(아합)등문제진행초보탐토.방법 선취아과근10년완성적14례감수제일마아교치병례진행분석.통과대교치전후모형적PAR지수화두로측위편,대교치후마아간극관폐、교합관계급연조직측모진행평개;병통과곡면단층편,초보평개제이마아적아근흡수화아조골적개건이급제이마아화전마아적아근평행상황.결과 14례환자평균료정(29.5±4.3)개월,PAR료효분석현시치료후변차혹무개변0례,개선5례,명현개선9례,제시발아간극관폐만의,아(아합)관계량호;연조직측모협조,면형만의;곡면단층편현시제이전마아여제이마아아근평행상황량호,제이마아아근급아조골무명현흡수.결론 감수제일마아병례지요엄격파악괄응증,합리적지항설계화엄근적림상조작,가이획득만의적림상교치효과.
Objective To evaluate the effects of the orthodontic treatment with first molar extraction and to investigate the relative treatment principles,space closure and third molar occlusion results.Methods 14 patients with the first molar extraction treatment in the past ten years were analyzed.Model PAR index and cephalograms were used to evaluate space closure,occlusal relationship,and soft tissue lateral profile after treatment.Panoramic films were used to evaluate root resorption,alveolar crest height and root paralleling of second molars.Results The average treatment time was (29.5±4.3) months.9 cases(64.3％)were evaluated as greatly improved,5 cases (35.7％) as improved,and none were evaluated as worse or no difference.Extraction spaces of first molars were closed; good occlusalrelationships and soft tissue profiles were achieved in all cases.The roots of second premolar,second molars and third molars were paralleled.The root and alveolar crest height of the second molars showed no significant difference after treatmen.Conclusions The first molar extraction cases could receive satisfactory results under strict plan,appropriate anchorage control and careful clinical operation.