牙缺失

Result The symptoms of congenital oligodontia were clinically classified into two groups: oligodontia with or without systemic syndromes. And the former has two typical kinds of diseases: anhidrotic/hypohidrotic ectodermal dysplasia and Rieger syndrome.

结果 多个牙先天缺失在临床有不同表现：一是合并发育缺陷综合征的先天多个牙缺失，典型病例为无汗少汗型外胚层发育不全和Rieger综合征等，二是作为独立症状出现的先天多个牙缺失。

Combination of orthodontics with restoration is a good idea for the patients with loss of anterior teeth.

应用正畸联合修复治疗，是一种理想的治疗前牙缺失的方法。

Objective To study the orthodontic planing of missing the first molars in class I malocclusion.

目的：探讨第一磨牙缺失在I类错牙合畸形中的矫治设计。

Measurements of the longitudinalseparation, buccolingual space and highness of the area were established to select the perfect spiral-shafted implant and simulating the implant. by means of the process the dentists can know about the complications well that may happen or not and know how to do the work wonderfully.

选择一例男性、55岁、右下第一磨牙缺失的患者，螺旋CT扫描， DICOM格式数据储存，应用OINS软件进行读取和分析，对缺牙区的前后径、颊舌径和所需高度进行测量，根据所得的数据并结合需要选择合适的种植钉，模拟种植。

The longest time was 22 months.the shortest time was 12 months. Conclusion The extraction planing of missing the first molars in class Ⅰmalocclusion is different from routine extraction mode.This clinical study indicated that it should chose nimble planing and for decurtate treatment time,according to arch crowding, profile and existing of the third molars.

第一磨牙缺失的患者在I类错牙合畸形中的拔牙模式有别于常规，要根据患者牙弓的拥挤程度，面型突度及有无第三磨牙等情况选择治疗计划和有利于缩短疗程的矫治方法。

The clinical characters of oligodontia concluded from this study are following:(1) There is significant difference that more teeth absent and more existent teeth anomalies in patients of oligodontia/S group than in patients of oligodontia/I group, and the peg-shaped upper lateral incisor is the most frequently affected teeth with shape anomaly.(2) Both of the two groups have no significant differences in number of teeth missing between maxilla and mandible as well as that between left and right side.(3) The distribution of teeth missing is bilateral symmetry in both groups, but the frequency of teeth lost are different: excluding the third molar, in oligodontia/I group, the lower second premolar is the most frequently congenitally missing tooth followed by the upper lateral incisor, while in oligodontia/S group, the most frequently missing teeth are mandibular canine and maxillary lateral incisor. Nevertheless, the first molars are the most stable teeth in both groups.(4) In oligodonita/I group, the mean mesiodistal dimensions of all type of existent teeth are significantly smaller than normal value. It is implied that oligodontia is not an isolated phenomenon, but is related to a complex of other dental changes.

对于口腔多个恒牙先天缺失的临床特点有以下初步结论：(1)综合征型先天缺牙患者较单纯型先天缺牙患者恒牙缺失数目更多，平均分别为23.9个和14.9个，且现存牙齿有更多的形态异常，分别为7／10例（70％）和6／22例（27.3％），其中最常见的是上颌侧切牙畸形；(2)两种类型的多个恒牙先天缺失患者的缺牙数目在上下颌及左右侧之间均无差别；(3)两种类型的多个恒牙先天缺失患者在缺失牙位上均呈对称分布，但在具体牙位上有所差异：不计第三磨牙，单纯型先天缺牙最常缺失的牙位是下颌第二双尖牙、其次为上颌侧切牙；而综合征型先天缺牙最常缺失的牙位是下颌尖牙和上颌侧切牙；无论何种情况，第一磨牙均为牙列中最稳定的牙齿；(4)在单纯型先天缺牙患者中，现存恒牙的牙冠宽度较国人正常值偏小，差异显著，提示牙齿形态与多个牙先天缺失有一定相关性。

Purpose Explore the clinical effect of recovery after orthodontics of the crossbite and loss of the anterior teeth.

目的 探讨用固定矫治方法矫治上前牙缺失伴前牙反后再修复缺失牙的疗效。

Dentitions of these patients were adjusted by orthondontical and restoration methods.

27例前牙缺失伴错牙合患者，用正畸方法对缺失的牙列进行调整，再辅以修复。

Pieces of faulty molar tooth point cloud data were obtained through the 3D measurement.

本文采用自制三维激光测量仪对牙颌表面数据进行三维测量，获得了单颗后磨牙缺失的牙颌模型多片三维点云数据。

Methods: 16 adults with front teeth sporadic gaps resulted from individual tooth early ablation or malocclusion were given orthodontic treatment using straight arch wire before restoration.

对16例成年人个别牙缺失致前牙散在间隙或伴有反牙合患者，采用直丝弓矫治技术进行修复前正畸治疗。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。