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.
目的研究在计算机上建立上颌中切牙的三维有限元数学模型。
Objective To discuss Construction of the three-dimensional finite element model of maxillary central incisor by using ct scanning technique.
阻生尖牙邻近切牙的根吸收组和无根吸收组尖牙的牙囊大小有无差别。
The extent and location with the root resorption of neighboring incisors were observed in the sequential transaxial views;
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.
方法作者1995～ 1998年间采用内染色技术为2 2单位行金属烤瓷修复的患者再现上颌中切牙的色彩。
Methods The author used the internal live stain technique to restore the color of maxillary central incisors for 22 patients between 1995 and 1998.
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.
目的：推导切牙合功能时，髁状突向前下方运行的距离及生理意义。
Objective: How distant the condyle moved to protrusive and its function importance for incisors occlusion.
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.
左中切牙上的烤瓷熔覆合金冠，可以使大多数牙科学校的辅导老师或保险顾问临床接受（图7）。
The porcelain-fused-to-metal crown on the left central incisor would be found to be clinically acceptable by most dental school instructors or insurance consultants (Fig. 7).
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.
下牙槽神经的终末支颏神经和切牙神经分别走行与上述两管内。
The inferior alveolar nerve at the end of mandibular canal is divided into two branches: the incisor nerve and the mental nerve.
目的：建立在混合牙列早期预测恒侧切牙牙冠及恒侧切牙至第二前磨牙冠宽和的回归方程。
Objective :In this study , regression equations (prediction equations) were established for the purpose of accurately predicting the mesiodistal widths of the crowns of unerupted 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.
本文对高角型深覆(牙合)形成的机理、切牙压低量的意义、应用多用途弓的注意事项进行了讨论。
It was also debated in this article that the mechanism of deep overbite of high Angle, sence of the amount of intrusion of incisors and notice in using utility arch.
结果缺牙部位最常见的是下颌中切牙、上颌侧切牙和下颌侧切牙，以少数牙缺失为主，女性多于男性。
Results mandible central incisor, maxillary lateral incisor and mandible lateral incisor were most missing teeth, and there were more females than males.
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.
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.
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.
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.
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.
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.
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：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.
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