牙缺失

The adhesion region between two adjacent teeth on the 3D dental model is first detected by exploiting the minimum principal curvature information. Then, the adhesion region is cut off and the tooth profile opening caused by the removal of the adhesion region is filled with triangular patches adopting a local optimization scheme, it is then refined to form an intermediate restoration surface patch. The final restoration result is obtained by minimizing the surface energy to reflect the bio-characteristics of the single tooth.

根据三维牙颌模型的形态特征，采用基于曲面最小主曲率的方法对粘连区域进行准确的检测提取；对删除齿间粘连区域后生成的齿间开口利用局部最优化权值规则进行剖分并细分优化，生成"中间"恢复曲面；根据牙齿的生理医学特征，以齿间开口的边界信息为约束条件，采用基于最小化曲面能量函数的方法对"中间"恢复曲面进行变形调整，实现单颗牙齿缺失形状的准确恢复。

If the posterior teeth or dental prostheses are missing, the cheeks may be sunken, producing a prematurely aged or cachectic appearance.

如果后牙或义齿缺失，颊部会凹陷而形成早老的或恶病质样的面貌。

Objective To investigate the mutation characteristics of paired box homeotic gene 9(PAX9) and mus-cle segment homeobox gene 1(MSX1) of patients with congenital oligodontia.

目的 探讨多数牙先天缺失患者的人类成对盒基因(PAX9)和肌节同源盒基因(MSX1)突变位点，为该疾病的病因学研究提供依据。

Key words:macroglossia;edentulous jaw;restorative design

舌体肥大；牙列缺失；修复设计

Pontic is the major component to restore the appear- ance and function of the lost tooth.

桥体是恢复缺失牙形态和功能的主要部分。

Reducing the basal thickness of complete denture and reconstructing palatal rugae will be helpful for the acoustic functional restoration in patients with dentition defects.

减少全口义齿基托厚度、重建腭皱形态有助于牙列缺失患者语音功能的恢复，计算机语音分析系统可对全口义齿初戴前后患者的语音变化特征进行定量分析。

OBJECTIVE: To evaluate the effect of clinical application of MK-1 attachment removable partial denture for distal-extended teeth missing cases.

目的：评价MK-1精密附着体可摘局部义齿修复牙列单侧远中游离缺失的临床效果。

Methods: 3-D FEM was used to make a comparative study of the effects of the implant to stress distribution of removable partial denture under different loads.

应用三维有限元法，在不同加载条件下分析比较有无种植体支持对于双侧后牙游离缺失可摘局部义齿应力分布的影响。

Objective To inquire into the clinical effects of ball attachment supported overdenture in patients with mandibular alveolar ridge defect.

目的 评价球帽固位的种植覆盖义齿修复牙槽嵴低平的下颌缺失的临床效果。

Methods: The terminal position of the muscular contraction path and centric relation position with different vertical dimension were recorded for ten edentulous patients with gothic arch.

采用哥特式弓描记装置测量10例无偏侧咀嚼的牙列缺失患者不同垂直距离下肌力闭合道终点位与正中关系位在平面上的位置关系。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。