牙冠

结论牙冠部相对牙根中点的电位随着冠部人工唾液pH值的减小而负向增大。

Conclusion The potential of the dental crown opposite the dental root middle point gradually reduced as the pH value of artificial saliva decreased .

而术后及6个月复查时，牙冠延长术组的龈袋深度均明显低于牙龈切除术组。

The depths in prolongations of dental crown group were much less than those in gingivectomy group when measured postoperatively and six months after operation .

人造牙冠做好后再去，牙医会把它安上。

When the crown has been made you go back and the dentist will fit it into place .

熔融渗入法制备Al2O3基玻璃复合牙冠材料

Making composite porcelain crown material with al_2o_3 and glass by melt infiltration

西安地区正常（牙合）牙冠宽度测量及上下颌牙量相关性研究牙列缺损成人下颌骨的CT三维重建和测量

Study on Mesiodistal Tooth Size and the Relationship between upper and Lower Teeth Dimension of Normal Occlusion from Han People in Xi an ; Three-dimensional Reconstruction and Measurement of the Edentulous Adult 's Mandible

标本经处理后，在每颗牙的牙冠区贴1mm×1mm箔式电阻应变片。

After preparation , a 1mm × 1mm strain foil was bonded on every crown .

方法利用CMS400三维层析测量数字化仪对贺利三层色合成树脂牙模型进行逐层扫描，获得各树脂牙的表面三维数据点，并通过CAD软件的处理，建立各牙冠的三维图形。

Methods Artificial resin teeth were measured with a CMS-400 3D digitizer by cutting and scanning layer-by-layer , 3D data points of each tooth acquired and the 3D models of these teeth reconstructed with a computer .

男性腭盖高度大于女性（P0.05）。结论：牙冠宽度、高度、各段牙弓的宽度均为男性大于女性。

Conclusions : The width and height of crown the width and length of the dental arch , and the height of the palate in Male were larger than those female in female .

在每组中随机抽取一只大鼠，处死后劈开左侧上颌M1牙冠，取出牙髓经固定后切片，进行透射电镜观察。

Upper left first molar of a rat randomly from each group was split and the freshly coronal pulp was obtained for TEM observation .

结果：DSPP的蛋白表达始于钟状中期，在内釉细胞和正在极化的成牙本质细胞中表达，牙体组织形成开始，则转至成牙本质细胞，直至牙冠硬组织完全形成。

RESULTS : Immunohistochemistry showed that DSPP was deposited at odontoblasts from middle bell stages to formation of dental crowns .

结果：CO2激光治疗组84例，牙冠充分暴露80例，部分暴露4例，术后出血4例，无术后肿胀及疼痛；

RESULTS ; Among the 84 cases treated with CO2 laser , complete eruption of tooth crown was observed in 80 cases , partial eruption in 4 , bleeding after operation in 4 , swelling and pain following treatment were not observed .

方法测量成人上颌快速扩弓组（RME组）和非上颌快速扩弓矫治病例组（对照组，C组）治疗前后牙牙合石膏模型临床牙冠高度的变化。

Methods Clinical crown heights of premolars and first molars were measured on the plaster model for both the group of adult rapid maxillary expansion ( RME ) and the group of non-rapid maxillary expansion ( C ) before and after treatment .

幼鳄孵出后第16d，牙冠已形成，同时牙胚已转移至牙槽底部。

The crown appeared , and the dental germ came into the bottom of the alveolus dentalis at the 16th day after the young alligator was out of the eggshell .

本论文尝试应用一种新的牙冠三维光学测量方法，以求精确测量牙冠外形，为义齿CAD-CAM系统增添新的测量手段，并在此基础上尝试贴面与全冠的计算机辅助设计研究。

This thesis represents the application of an optical method to obtain the 3-D parameters of teeth surfaces for the purpose of design veneer and artificial crown by computer-aided design .

目的通过对比色记录的统计分析，比较Vita比色板与宁波地区人群牙冠颜色的适应性及分布频率，并提出临床比色要点。

Objective Through statistical analyses of color-matching records , the author compared the adaptability of Vita color tabs tooth color of the people living in Ningbo and the distribution frequency . The key points of clinical color matching were also given in the paper .

结果：唇挡治疗后，SNA、SNB分别增加1.02°和0.97°（P<0.05），上下切牙前移均是牙冠向近中倾斜，而根尖相对固定的控制性倾斜，旋转中心接近根尖。

RESULTS : After treatment , SNA and SNB increased by 1.02 ° and 0.97 °( P < 0.05 ) . Upper and lower incisor both had controlled tipping movement . The crown of incisor moved mesially and had root apex were fixed relatively .

结论：在患者备牙模型上，按照患者口腔约束条件，利用DFFD变形设计方法对牙冠的设计是可行的，同时也为外冠桥牙冠数字化设计的研究奠定了基础。

Conclusion The constraint design method of tooth crown based on DFFD is feasible , which is an approach to further researches on the design of the tooth crown bridge .

目的：探索逆向工程技术软件结合Micro-CT技术在牙体组织精细三维有限元模型建立中的应用，建立上颌第一前磨牙牙冠的精细三维有限元模型。

PURPOSES : To explore the value of the combination of the reverse engineering software and micro-CT technique in the reconstruction of the fine 3-D FEA model of the tooth structure . Reconstruct the fine 3-D FEA model of the crown of the human maxillary first premolar .

Shh抗体阻断组形成的牙宽度较小，牙冠形态不规则，只有一个明显的牙尖且牙尖高度较Shh-N体外诱导组和对照组明显变低。

Most of the teeth harvested from the Shh antibody group were small and abnormal . A single irregularly shaped cusp was visible , and a partial crown formed . The main cusp height in this group was significantly lower than that in the Shh-N group .

结论牙冠延长术治疗断缘位于龈下4mm以内，根长有1.2cm以上者残冠残根疗效确切，保持了生物学宽度，利于全冠修复，有一定的临床应用价值。

Conclusion Curative effects of crown lengthening surgery for the patients characterized by PD no more than 4 mm and residual root of residual crown was 1.2 cm and above , which maintains biological breadth , is benefit for complete coronal restoration and is definitive value of clinical application .

（牙科）在牙齿上有人造的牙冠。

( dentistry ) having an artificial crown on a tooth .

牙医：你得镶上牙冠。

Dentist : you 'll need to have a crown fitted .

两种方法治疗牙冠周炎的疗效比较

Comparative observation of results in treatment of pericoronitis with different methods

前牙冠折即刻美容修复的临床观察

Clinical analysis for Instant cosmetic restoration of traumatic anterior tooth crown

238例后牙冠根纵折的临床分析

Clinical Analysis on 238 Cases of Longitudinal Fracture of Posterior Teeth

标准牙冠计算机三维图形的重建及其空间几何变换的研究

3-D reconstruction of standard tooth crown and related shape deformation

前牙冠根折的自体牙冠再接术

Autogenous crown rejoining for root fracture of anterior teeth crown

用复合树脂在后牙残根上修复牙冠的临床观察

Application of Composite Resin for Restoring Posterior Teeth on the Residual Roots

对前牙冠折所致切角缺损修复的疗效观察

Clinical evaluation of restoring incisal corner defect of crown fracture

基于逆向工程的标准牙冠模型的建立

Building of Ideal Dental Crowns Model Based on Reverse Engineering