拔除第一磨牙矫治后第三磨牙萌出情况初探

目的:通过比较不同拔牙方法矫治后第三磨牙萌出的情况,评价拔除第一磨牙矫治对第三磨牙萌出的影响.方法:选取拔除第一磨牙矫治、拔除第一前磨牙矫治和非拔牙矫治3组病例(上颌各20例、下颌各30例),对全颌曲面断层片中测得矫治前后第三磨牙萌出的各项评价指标变化量进行比较研究.结果:(1)第三磨牙萌出间隙及其与牙冠近远中径的比值变化量在3组之间均有统计学差异(P<0.05),拔第一磨牙组大于拔第一前磨牙组和非拔牙组.(2)上颌第三磨牙萌出角度变化量在3组之间均有统计学差异(P<0.05),拔第一磨牙组大于拔第一前磨牙组和非拔牙组;下颌第三磨牙萌出角度的改变量在各组之间没有统计学差异(P>0.05).结论:上颌拔除第一磨牙矫治较常规矫治能明显增加第三磨牙的萌出间隙并改善其萌出角度;下颌拔除第一磨牙矫治较常规矫治能明显增加第三磨牙萌出间隙,而对于第三磨牙萌出角度3组间并无明显差异.     

正畸治疗安氏Ⅲ类错的临床研究

目的 了解正畸治疗安氏Ⅲ类错(牙合)的机理。方法 应用X线头影测量的方法对30例安氏Ⅲ类错(牙合)正畸治疗前后的头颅定位侧位片进行测量研究。结果 安氏Ⅲ类错(牙合)正畸治疗后下颌平面角增大,上前牙的唇倾度增加,下前牙的唇倾度减少。结论 正畸治疗Ⅲ类错(牙合)的机理是使下颌作顺时针旋转及改变上下前牙的唇倾度。     

正颌外科矫治骨性Ⅲ类错牙合中的正畸治疗

颌骨发育异常导致严重颌面部畸形，须采用正畸及外科相结合的方法才能使牙、颌、面获得平衡、协调的关系，恢复面部美观及咬合功能。下颌骨前突而形成骨性Ⅲ类错牙合是临床上最常应用正颌外科矫治的类型［１］。为了取得最佳的疗效，保持稳定的治疗效果，外科手术前后均应...     

Ⅲ类错正畸治疗前后髁突及下颌位置变化的临床研究

目的:了解Ⅲ类错癙正畸治疗后髁突、下颌位置相对于颅底位置的变化情况。方法:利用张口型头颅定位侧位片与正中咬合头颅定位侧位片相结合的方法,对40例Ⅲ类错癙正畸治疗前后的头颅定位侧位片进行测量研究。结果:正畸治疗前、后的髁突的水平距离分别为(11±3)mm、(11±4)mm,P>0.05;垂直距离分别为(7.4±1.7)mm、(8.5±1.7)mm,P<0.01;下颌平面角分别为(26±5)°、(30±5)°,有高度显著的统计学意义(P<0.001)。结论:Ⅲ类错癙治疗后髁突主要是向下移位,下颌骨顺时针旋转明显。     

一例拔矫治骨性开■畸形

骨性开畸形是一种较为复杂的错畸形，尤其是恒牙期的前后牙开畸形，临床上对这种错的矫治方法以及治疗后的稳定性仍有一些争议。作者在临床上通过拔除６４４６６４４６成功地矫治一例骨性前后牙开畸形，探讨了骨性开畸形的特征、正畸治疗开畸形的原理及临床矫治开畸形中应注意的一些问题     

固定矫治对错(牙合)患者口腔健康相关生活质量的影响

Objective To assess oral health-related quality of life in patients with fixed appliances.Methods Orthodontic patients were asked to complete the scale of general conditions(Chinese version,questionnaire 1)and oral health impact profile(OHIP)-14(Chinese version,questionnaire 2).Baseline data were collected at first visit and thereafter.The subjects finished questionnaire 2 at the 1st week,4th week,12th week and 24th week,respectively,after the fixed appliance was bonded.Data were analyzed to evaluate the various sample groups with different personal information and clinical parameters.Results were collated and analyzed using software package SPSS version 15.0.Results The most common negative effect was physical pain[55/222(27.8%)]and psychological discomfort[40/222(18.0%)],mainly in the first month.The total scores at five time points were 3,10,7,5 and 4,respectively.No difference was found in quality of life in patients between sixth month with fixed appliance and without appliance(P＞0.05).Age and education status affected the quality of life(P＜0.001).Conclusions Fixed orthodontic appliance therapy affected patients' oral health-related quality of life during treatment.The quality of life in the first month of treatment was mostly compromised and was improved later.     

固定矫治对错(牙合)患者口腔健康相关生活质量的影响

Objective To assess oral health-related quality of life in patients with fixed appliances.Methods Orthodontic patients were asked to complete the scale of general conditions(Chinese version,questionnaire 1)and oral health impact profile(OHIP)-14(Chinese version,questionnaire 2).Baseline data were collected at first visit and thereafter.The subjects finished questionnaire 2 at the 1st week,4th week,12th week and 24th week,respectively,after the fixed appliance was bonded.Data were analyzed to evaluate the various sample groups with different personal information and clinical parameters.Results were collated and analyzed using software package SPSS version 15.0.Results The most common negative effect was physical pain[55/222(27.8%)]and psychological discomfort[40/222(18.0%)],mainly in the first month.The total scores at five time points were 3,10,7,5 and 4,respectively.No difference was found in quality of life in patients between sixth month with fixed appliance and without appliance(P＞0.05).Age and education status affected the quality of life(P＜0.001).Conclusions Fixed orthodontic appliance therapy affected patients' oral health-related quality of life during treatment.The quality of life in the first month of treatment was mostly compromised and was improved later.     

掌握Begg矫正技术的再探讨

目的 进一步探讨Begg技术的优点.方法 64例错牙合患者,男30例,女34例,年龄11.2～15.8岁,平均12.7岁.严格按照Begg技术的步骤进行矫治,并进行总结分析.结果 疗程最短12个月,最长27个月,平均15.3个月,所有病例矫治后达到磨牙中性,牙齿排列整齐,覆牙合覆盖正常,咬合关系良好.结论 正确使用Begg技术,不仅牙齿移动快,能迅速打开深覆牙合,而且能很好地排齐牙齿,矫治结果满意.     

直接数字化X线摄影影像后处理对头影侧位标志点清晰度的影响

目的 探讨直接数字化X线摄影影像后处理对头影侧位标志点清晰度的影响及其意义.方法 分析41幅头影侧位定位直接数字化X线摄影(DR)影像19个定点的清晰率,然后将这41幅DR图像经适当的影像后处理,分析处理后19个定点的清晰率,比较处理前后19个定点清晰率的变化.结果 41幅头影侧位定位影像经影像后处理,清晰可辨的标志点总数比处理前明显增加,P＜0.01,差异有统计学意义.结论 头影侧位定位DR影像经影像后处理,可提高标志点的清晰度.提倡直接在显示屏上阅片、定点,以充分利用DR图像的后处理功能,提高定点、诊断的准确性.     

片段弓联合微种植体支抗直立倾斜磨牙

目的 评价用片段弓联合微种植体支抗直立倾斜磨牙临床效果.方法 选择24例（28颗）邻牙缺失磨牙近中倾斜的患者,使用片段弓联合微种植体支抗直立倾斜磨牙,通过模型测量评价疗效.结果 治疗后第一磨牙磨牙水平移位（1.92±0.98） mm,近中倾斜角减小（20.67±5.14）°;第二磨牙水平移位（2.60± 1.09） mm,近中倾斜角减小（25.36±6.57）°,均有明显的竖直效果.结论 片段弓联合微种植体支抗直立倾斜磨牙是一种简便、舒适、有效的方法.