tooth crown

Methods: Seventy extracted maxillary first premolars were used in this study. The Tooth Length, Crown Length, Root Length, Cervix Thickness, Cervix Width, Crown Thickness and Crown Width were measured with a vernier caliper.

方法：收集牙齿发育完全根尖完整的上颌第一前磨牙70颗，用游标卡尺测量每个牙的牙长、冠长、根长、颈厚、颈宽、冠厚和冠宽。

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

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

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Generating the FEM model: We pick out one probably intact extracted mandibular second molar as the specimen tooth, whose crown length, width and height are close to the normal mean value of the named same teeth.

有限元模型的建立：选择1颗较完整的下颌第二磨牙作为标本牙，其牙冠的长、宽、高以及冠根比例接近正常均值。

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Dentistry To put a crown on ( a tooth ).

为 ( 牙齿 ) 镶齿冠.

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Conclusion Restoring tooth crown longitudinal dehiscence is of the effective Methods: To keep the sick tooth.

结论: 用全冠修复后牙牙冠纵裂是保存纵裂牙齿的有效方法之一.

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The restoration and treatment of posterior tooth crown longitudinal dehiscence

后牙牙冠纵裂的修复治疗

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Methods Among 27 cases who perform cosmetic prosthesis for anterior tooth after crown lengthening, there are 16 cases with post crown, 11 cases with comprehensive prosthesis.

方法：对27例行牙冠延长术的患者进行常规的前牙美容修复，其中16例采用单纯桩冠修复，11例采用综合法进行美容修复。

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Objective To estimate the effect of restorative treatment on conserving posterior crown fracture tooth.

目的:评估用修复的方法保存后牙牙冠纵裂牙齿的效果.

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The bigger is the wallop, the longer is the effect time of crown remover to tooth and crown, vice versa.

冲击力越大，拆冠器对实验全冠、基牙作用时间就越长，反之则越短。

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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.

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。

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The deformation design is finished. ( 3) The construction technology of the standard tooth crown database is researched.

研究了标准冠数据库的建库技术。

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Clinical usage for restoration of traumatic anterior tooth crown using flowable resin in children

流动复合树脂在儿童前牙外伤牙冠断端再接术中的临床应用

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Methods Fabricating tooth crown with well of plunger attachments, deciding the wearing path of dentures.

方法制作带有插销式附着体底座的基底冠,并通过平行研磨仪确定附着体的共同就位道.

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Conclusion Casting full crown is one of the effective restorative procedures in the majority anodontia of posterior tooth.

结论铸造全冠修复是治疗后牙大部分缺损有效方法之一。

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Analysis of curative effect of partial pulpotomy of exposed pulp of permanent anterior tooth with fracture of crown

恒前牙冠折露髓部分切髓术的疗效分析

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Methods: The color of3 kinds of imported composite resin and that of Chinese tooth crown of normal individuals was measured based on standard background with spectrum colorimeter.

方法：选取3种临床上常用之进口光敏树脂为实验材料，在标准背景下以分光光度计测定其色度值后，与天然牙冠色度范围进行比较，分析其色度分布差异。

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Results: The color distribution space of the 3 kinds of resin were smaller than that of Chinese tooth crown, but the centers were almost same. There were significant color distribution difference between imported resins and Chinese tooth crown.

结果：3种中任何一种进口光敏树脂之色度分布范围均小于但位于天然牙冠色范围之中，即不能达到与天然牙色度范围的完全重合，并且在分布上各有特点。

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Clinical analysis for Instant cosmetic restoration of traumatic anterior tooth crown

前牙冠折即刻美容修复的临床观察

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Re-repair of Broken of Original Tooth with Ceramic Crown

烤瓷冠基牙折断后的再修复

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Quick method of rehabilitation of tooth crown fracture with resin tooth product and screw thread root canal spile

螺纹根管钉和成品树脂牙作快速桩冠修复

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Conclusion Restoring posterior tooth crown longitudinal dehiscence is one of the effective methods to keep the sick tooth.

结论：用全冠修复后牙牙冠纵裂是保存纵裂牙齿的有效方法之一。

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A crown for covering or sealing a tooth.

齿冠:遮盖或密封牙齿的冠状物.

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The width of the tooth crown, the size of the dental arch and dental base bone were measured with a vernier. The measurments were statistically analysed.

方法：56副正常恒牙模型，用游标卡尺及特制工具测量牙冠宽度、牙弓大小和指数，基骨宽度、长度、腭盖高度，并进行统计学处理并对其特征进行了分析。

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Effective cracked tooth of therapy, endodontic treatment and full crown prosthesis can be prevention methods.

积极诊治牙隐裂 、 合理的牙髓治疗及全冠修复是预防牙折裂的有效方法.

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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.

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；

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Patients undergoing two vital tooth preparation for crown/ bridge were selected for the experimental volunteers and who gave informed consent was included in the study.

有两颗牙进行冠或者桥修复预备的患者入选试验的志愿者，并且在试验之前征求患者的知情、同意并签字。

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CONCLUSION: The marked clinic effect is required for adhering fractured anterior tooth crown in this new method.

结论：使用这种新方法对上前牙牙冠折断的再粘接取得了明显临床效果。

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Objective To discuss the re-repair of broken of original tooth with ceramic crown.

目的探讨烤瓷冠基牙折断后的再修复方法。

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The color comparison between 3 kinds of imported composite resin and tooth crown of Chinese

三种进口光敏树脂与中国人牙冠色度学比较

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Objective To analyze the effect of preserving severely damaged teeth such as stubbed tooth root 、 crown and vertically fractured tooth through compositive therapy.

目的利用综合治疗，对残根、残冠、纵折牙等严重缺损牙进行保存治疗并分析其疗效。

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