上颌中切牙的短根牙比例相当高。
The rate of short root was high in maxillary central incisors.
较常见的是尖牙和上颌切牙的埋伏阻生（第三磨牙除外）。
Impacted tooth frequently appears in upper cuspid and upper central incisors(except of the third molar) .
但有资料表明下颌切牙的根管解剖形态较为复杂，变异较多。
However, some research data show that mandibular incisors' root canal anatomy is comparatively complex, and root canal system has many variations.
在三维有限元模型的基础上，利用有限元分析软件对上颌中切牙的振动模态进行了分析。
By using the finite element method (FEM) software, the vibration of 3-d finite element model of maxillary central incisor tooth was analyzed.
结论氟对小鼠切牙的毒性效应在其发育初始阶段即已产生影响，并与时间和剂量有密切关系。
Conclusion The toxic effect of fluorine on mouse incisor begins to show at early stage of its development, which is closely related with time and dose.
我们发现切牙的舌侧的颈环结构内也包括少量的星网状层细胞，推测其可能发挥干细胞龛的作用。
We show that the lingual cervical loop contains a small core of stellate reticulum cells and suggest that it acts as a functional stem cell niche.
不能依靠曲面断层片上阻生牙牙冠与邻牙牙根的重叠范围来判断是否存在切牙的牙根吸收及吸收程度。
The overlap range of impacted canine and the root of incisors can't be used as an indicator of the extent of the incisor root resorption.
结果得到切牙乳突与腭皱形态的测量方法和基础数据。
Results We gained the basic data and find a measuring method of incisive papilla and palatal wrinkle.
下颌切牙中，双根管、根管分支和根管分歧都有一定的发生率。
The two root canals, root canal diverge and root canal branch et al have considerable incidence. Besides, mesial-distal root canal walls of mandibular incisor teeth are thin.
尖牙改形替代侧切牙是安全可行的。
The procedure of reshaping canines to resemble the missing lateral incisors is safe clinically.
目的：观察恒切牙外伤冠折后行一次性根管治疗与断冠再接术的临床效果。
Objective To investigate the clinical effect of one-time root canal therapy and reattachment of permanent incisors with crown fracture.
目的：研究上颌侧切牙畸形根面沟的外形。
AIM: To study the morphology of deform root groove in the maxillary lateral incisors.
目的：观察用粘结桥、单端固定桥两种方法联合修复上颌侧切牙缺失的临床效果。
Objective: to evaluate a method to restore maxillary lateral incisor with adhesion and cantilever bridge.
目的：研究不同浓度的普洱生茶、熟茶对牛切牙脱矿速率的影响。
Objective: To study the influence of different concentrations of Pu 'er tea, ripe tea on the demineralization rate of bovine incisors.
本文通过技工操作和临床实例详细介绍了利用内染色瓷粉表现年轻中切牙典型色彩特点的技术，并对内染色技术的优缺点和适应范围进行了讨论。
This article introduces in detail the technique to reproduce the typical shades of young central incisors with internal live stain powder and discusses its advantages, shortcomings...
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.
计算13种力系统下的上中切牙位移、转动中心及牙周应力分布。
The displacement, the position of the rotation center and the stress distribution of PDL were analyzed under 13 types of loading force system.
下颌骨的生长方向趋于正常，下切牙略唇倾。
The mandible resumed a normal growth direction, and the lower incisors flared more than normal.
目的研究过量氟对大鼠下切牙发育过程中釉蛋白表达的影响。
Objective To observe the effect of overdose fluoride on the expression of enamelin in rat mandibular incisor.
目的探讨用氟保护漆治疗乳切牙早期奶瓶龋的临床效果。
Objective to evaluate the clinical effects of Flour Protector in treatment of teeth with early milk bottle primary caries.
目的：建立不同垂直骨面型正常牙合人切牙区颌骨形态结构的正常值。
Objective: To establish the cephalometric standards for in ci sal jaw morphology in the subjects with normal occlusion and different vertical facial skeletal types.
前方和后方部位具有连续的成釉细胞层，具备切牙颈环的形态和分子特征。
The anterior and posterior aspects maintained the morphological and molecular characteristics of the cervical loop of a continuously growing incisor, with a continuous layer of ameloblasts.
目的探讨将脉搏血氧饱和度测定仪用于检测中切牙牙髓血氧饱和度以判定牙髓活力的可行性。
Objective To discuss the feasibility of examining the saturation of oxygen in blood of pulp using pulse oximeter in order to judge the pulp vitality.
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.
目的探讨正畸关闭间隙法治疗上切牙缺失的适应症，矫治方法及临床效果。
Objective To investigate the indication, treatment methods and effects in cases with missing maxillary incisors by means of orthodontic space closure.
曲面体层片对上颌阻生尖牙邻近切牙根吸收诊断的灵敏度是43.8%，特异度是82.4%；
The sensitivity and specificity of diagnosing the incisors root resorption caused by impacted maxillary canines using PTG were 43.8%and 82.4%respectively.
目的：对多曲方丝弓技术中打开咬合所产生的力学系统进行有限元分析，了解多曲方丝弓打开咬合时下颌中切牙牙周膜应力分布情况。
Objective:The purpose of this article is to study the force system that produced by multi-loop edgewise arch wire while opening the bite.
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.
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