分牙

目的分析不同规格分牙簧的应力，找出形状结构因素对分牙簧力学行为影响的规律。

Objective To evaluate the shape and structure of different separators affecting the mechanical behavior .

牙再植术的历史悠久，但是脱位牙根面部分牙周膜细胞活性丧失、牙根吸收，影响着牙再植术的成功率。

As we know , the replantation of tooth has a long history . But the lose of the activity of periodontal ligament cells and root replantation has influenced the successful rate of tooth replantation for a long time .

超声骨刀在临床上水平低位阻生智齿的拔除过程中具有优势，但单独使用效率较低，尤其在分牙方面。而对于切骨操作可以达到最佳效费比。

Ultrasonic osteotome has its advantage in the extraction of low horizontally impacted wisdom teeth , but is less efficient when used alone especially in tooth-separating , while for the operation of osteotomy , it can achieve the best cost-effective .

根据病因学分类可将其分为牙性错（牙合）和骨性错（牙合）两类。

According to etiopathology , it can be classified into two types : dental and skeletal malocclusion .

一般可分为牙围炎病变累及的继发型和局部解剖因素导致的狐立型两种。

Generally may divide into the solid inflammation pathological change and continues the hairstyle and the partial dissection , the fox vertical type two kinds which the factor causes .

方法选用10周龄雄性成年SD大鼠96只，随机分为正常牙组、牙周炎牙组，每组48只。

Methods 96 adult SD rats of 10 weeks old were randomly divided into normal tooth move-ment group and periodontitis tooth movement group .

先天缺牙可分为个别牙先天缺失（hypodontia）、多数牙先天缺失（oligodontia）和先天无牙症（anodontia）三种类型。

Congenital missing tooth can be divided into hypodontia , oligodontia and anodontia . Oligodontia is defined as absence of six or more teeth .

将5例下颌骨分为前牙区、颏孔区、后牙区等部位，应用trophy数码牙片机拍摄X线平片，观察并进行描述。

The 5 mandibular should be divided into the former area , the foramen area , the molar area , then every area should be have a x-ray picture using trophy machine . Each picture should be observed and described .

方法将42例门诊患者按牙齿变色原因分为四环素牙、氟斑牙、外在因素变色牙（年龄、咖啡、茶、香烟等）3组，进行Denlinx冷光牙齿美白术治疗。

Methods 42 cases of such patient in OPD were divided into 3 groups according to tetracycline teeth , fluorosis and pigment teeth and they were treated with luminescence .