切牙

从中切牙到侧切牙、尖牙，上颌前牙的a、b值呈逐渐增大的趋势，即色相逐渐向红黄色过渡。

A ~ and b ~ value increased from middle incisor to lateral incisor , to canine .

大鼠切牙Apicalbud上皮细胞的分离与培养

The isolation and culture of rat incisor apical bud epithelium

结论：安氏II类2分类错牙合与过小侧切牙、釉质发育不良、先天缺牙密切相关。

Conclusion : Angle Class II division 2 malocclusion is closely related to congenital tooth anomalies .

目的应用口腔颌面专用锥形束CT检查分析埋伏上颌中切牙的影像特点并进行分类。

Objective To analyze and sort out the impacted maxillary central incisors ( IMCI ) depending upon the examinations of Cone-beam CT .

目的：尝试上颌中切牙贴面计算机辅助设计（CAD）方法。

Objective : To develop a new method of computer aided design ( CAD ) of veneer on maxillary incisor .

过量氟对大鼠切牙bFGF表达的影响

The effect of fluorosis on the expression of bFGF in rat incisors

结果AngleⅡ1病例矫治后的硬组织改变主要表现为上下切牙唇倾度的减小，（牙合）平面角的增加及磨牙的伸长；

Results After treatment , the labial inclination of upper and lower incisors was reduced . The occlusal plane angle was increased and molars were extruded .

方法：拔除兔一侧上下颌中切牙后，植入面团期时的PMMA。

Method : The rabbit socket was implanted into with the PMMA of wheat ball period .

左侧上颌中切牙的BI最小；左侧上颌第一前磨牙的BI最大；

BI of upper left first bicuspid was the highest , and the upper left incisor was the lowest .

方法：采用螺旋CT扫描、数字影像传输与转录方法，获得中切牙三维形态的原始数据。

METHODS : Spiral CT ( SCT ) scanning technology , digital image transfer and transcription were used to obtain the initial 3-D data of the upper central incisor .

Bolton指数指导分析先天缺失单个下切牙病例牙量不调

Analysis of Tooth-Size in the Cases with Congenital Missing Single Mandibular Incisor

目的：建立一种分离、培养大鼠切牙Apicalbud上皮细胞的有效方法。

Objective : To establish an effective method of isolation and culture of rat incisor apical bud epithelium .

上唇压力与切牙覆盖呈正相关，下唇压力与切牙覆牙合及下牙弓长度呈正相关，并可导致下颌后缩，加重了AngleⅡ类错牙合畸形。

Upper lip pressure was related to the overjet between incisors , lower lip pressure was related to deep overbite and the length of dental arch , and therefore related to Angle Class ⅱ malocclusion .

Micro-CT扫描下颌乳中切牙釉质厚度的研究

An investigation of enamel thickness in primary mandibular central incisors using Micro-CT

MBT矫治技术内收上颌切牙位置变化的研究

The study of the changes of upper incisor using MBT to retraction

上下切牙明显唇倾，OB减小、OJ增加。

The upper and lower incisors labial inclined significantly , OB decreased and OJ increased .

IpsEmpress铸瓷贴面修复上颌年轻恒切牙冠折的临床观察

Three years clinical observation of effect of young permanent incisal teeth with crown fracture restored by IPS Empress porcelain laminate veneers

一副恒牙包括：8个尖牙，8个犬齿，2个磨牙和8个痰盂。（应为8个切牙incisors，4个尖牙canines，8个双尖牙premolars和12个磨牙molars）

A permanent set of teeth consists of eight canines , eight cuspids , two molars , and eight cuspidors .

方法选取新鲜离体牛上中切牙46颗，分为两组，分别采用Er，Cr：YSGG激光和高速手机切割牙体。

Methods Forty six vitro bovine incisors were divided into two groups . They were cut by Er , Cr : YSGG laser and high-speed dental handpiece ( KaVo ), respectively .

方法：取出生后3~4d的SD仔鼠切牙，将切取的颈环结构种植到母鼠肾被膜下，建立组织工程牙齿的体内培养模型。

Methods : Cervical-loop structures were isolated from upper and lower incisors of postnatal 3 - to 4-day SD rats and implanted into the renal capsule of syngeneic SD rat hosts .

动物模型的建立：以兔上颌切牙为支抗牙，80g力拉上颌第一磨牙向近中移动。

Using 80g force to make the first molar mesial movement .

是指用工具钢、合金钢制造的滚牙（或切牙）丝锥，精度为H4。

The thread rolling tap is made by tool steel or alloy , the precision is H4 .

方法以4只Beagle犬双侧上下颌第二切牙及尖牙作为手术部位，共32个，将其配对分组为实验组和对照组各16个牙位。

Methods : The second incisor and the canine of four beagle dogs were randomly divided into the experimental group and the control group .

结果：矫治后上下切牙明显内收，上下唇突度明显减小（P<0.001），Z角增加（P<0.01）；

Results : After treatment , both upper and lower incisors were retracted , upper and lower lip protrusion decreased ( P < 0.001 ), and Z angle increased significantly ( P < 0.01 ) .

目的观察慢性氟中毒对小鼠切牙成釉细胞骨形成蛋白-2（BMP-2）表达的影响，探讨氟斑牙的致病机制。

Objective To investigate the expression of BMP-2 in mice incisor enamel organ cells under chronic fluoride exposure and elucidate the mechanism of dental fluorosis .

目的：研究上颌切牙段在10N·mm冠唇向、根舌向力偶作用下，牙齿及其牙周支持组织应力分布及移动趋势。

Objective : To study the stress distribution in periodontal tissues and the initial displacements of maxillary incisors under the 10N . mm linger torque force .

目的研究过量氟对大鼠切牙生长过程中基质金属蛋白酶-20（MMP-20）和基质金属蛋白酶组织抑制剂-2（TIMP-2）表达的影响，探讨氟斑牙的发病机制。

Objective To investigate the effects of overdosed fluoride on the expression of MMP-20 and TIMP-2 in rat incisor .

结论：切牙管区种植体植入方向应与切牙管平行，与鼻底平面成约115°角；切牙管前部牙槽骨较薄，宜植入直径为4mm以下的种植体。

The bone in front of nasopalatine duct was thin , the diameter of implants applied here should be less than 4 mm .

结果发现：Apicalbud和切牙牙乳头细胞团形成组织结构规则的釉质和牙本质组织，HERS细胞与磨牙牙乳头细胞团形成了骨样牙本质样组织。

It was found that apical bud and incisor papilla cells pellet developed into well-formed enamel and dentin tissues , whereas the combination of HERS cells and molar papilla cells produced bone-like dentin tissues .

结果：上颌中切牙轴倾度、ANB角，后牙牙槽高度，矫治前后有显著性差异。

Results The anterior axias of central incisors 、 ANB angle 、 height of anterior and posterior alveolar showed significant different before and after treatment .