缺牙的

Tooth agenesis also named teeth number deficiency. It happens in tooth forming process or earlier period of tooth germ development.

先天缺牙又称牙齿数目不足，是在牙胚形成过程中或牙胚发育的早期，即牙蕾形成期的异常。

Objective: To study the treatment methods of malocclusion patients with congenitally missing teeth, and to explore the position, type and treatment methods of congenitally missing teeth.

目的：探讨伴有先天缺牙的错牙合畸形患者先天缺牙的部位、类型和矫治方法。

Periodontal disease is one of chiefly reasons of dentition defect .

牙周病是造成牙列缺损的主要原因之一，牙周病缺牙的特点是缺牙两侧的余留牙也有不同程度的牙周疾患。

10 Months teeth are normal, as long as the baby is not a calcium deficiency, it needs not worry too much to observe the things he likes to bite and the beginning of the habit of spitting when he was prepared to gutta-percha, which he precursor to long teeth, dental grow sooner or later with the genetic and tooth depth, and if not yet one year old, long teeth again no later than the hospital.

4-10个月萌牙都是正常的，只要宝宝不缺钙，就不用太担心，观察他有喜欢咬东西的习惯和开始吐口水时，可以给他准备牙胶，这是他要长牙的前兆，牙长得早晚与遗传和牙胚的深浅有关，如果一岁还没长牙再去医院不迟。

Objective To summarize the results of treatment in patients with partial edentia and malocclusion.

目的 通过对伴有先天缺牙的错牙合畸形病例进行回顾性研究为临床治疗提供参考。

The waiters, when they saw Nick, then towheaded, with a gap between his front teeth, would lift him up and set him on telephone books stacked on a stool at the counter.

当服务员看到缺牙的小毛头Nick，他们会把他抱起来，放到柜台上那张垫了电话本的凳子上。

Objective: To identify EDA gene mutation in a pedigree of Han nationality in Xinjiang with X-linked hypohidrotic ectodermal dysplasia so as to provide a basis for gene and genetics diagnosis of this disorder.

目的：检测一新疆汉族X连锁少汗性外胚叶发育不全家系引起先天缺牙的EDA基因突变，为XLHED综合征的基因和遗传学研究提供理论依据。

The restoration of dentition meant not only to fill the missing teeth and increase the efficiency of mastication, but also to maintain the integrity of dentition and the health of residual teeth, especially loosen teeth that could be reserved. Bone resorption might lead to teeth mobility and the change of occlusal pattern and proximal relationship. Also, the endurant threshold to bite force decreased. Occlusal loads within the normal range to loosen teeth would lead to broken down of periodontal tissues.

中文题名PVDF咀嚼力测试仪的研制及松动牙咀嚼生理功能的研究副题名外文题名 The study of masticatory performance of loosen teeth and PVDF-based instrument for dynamic chewing force measurement 论文作者李鸿波导师姚月玲教授学科专业口腔临床医学口腔科学研究领域\研究方向学位级别博士学位授予单位第四军医大学学位授予日期2002 论文页码总数108页关键词牙列缺损松动牙咀嚼力最大〓力馆藏号BSLW /2003 /R783 /9 修复牙列缺损不但要修复缺牙、恢复咀嚼功能，也要维护牙列的完整性、保护余留牙，尤其是可保留的松动牙的健康。

The clinical characters of oligodontia concluded from this study are following:(1) There is significant difference that more teeth absent and more existent teeth anomalies in patients of oligodontia/S group than in patients of oligodontia/I group, and the peg-shaped upper lateral incisor is the most frequently affected teeth with shape anomaly.(2) Both of the two groups have no significant differences in number of teeth missing between maxilla and mandible as well as that between left and right side.(3) The distribution of teeth missing is bilateral symmetry in both groups, but the frequency of teeth lost are different: excluding the third molar, in oligodontia/I group, the lower second premolar is the most frequently congenitally missing tooth followed by the upper lateral incisor, while in oligodontia/S group, the most frequently missing teeth are mandibular canine and maxillary lateral incisor. Nevertheless, the first molars are the most stable teeth in both groups.(4) In oligodonita/I group, the mean mesiodistal dimensions of all type of existent teeth are significantly smaller than normal value. It is implied that oligodontia is not an isolated phenomenon, but is related to a complex of other dental changes.

对于口腔多个恒牙先天缺失的临床特点有以下初步结论：(1)综合征型先天缺牙患者较单纯型先天缺牙患者恒牙缺失数目更多，平均分别为23.9个和14.9个，且现存牙齿有更多的形态异常，分别为7／10例（70％）和6／22例（27.3％），其中最常见的是上颌侧切牙畸形；(2)两种类型的多个恒牙先天缺失患者的缺牙数目在上下颌及左右侧之间均无差别；(3)两种类型的多个恒牙先天缺失患者在缺失牙位上均呈对称分布，但在具体牙位上有所差异：不计第三磨牙，单纯型先天缺牙最常缺失的牙位是下颌第二双尖牙、其次为上颌侧切牙；而综合征型先天缺牙最常缺失的牙位是下颌尖牙和上颌侧切牙；无论何种情况，第一磨牙均为牙列中最稳定的牙齿；(4)在单纯型先天缺牙患者中，现存恒牙的牙冠宽度较国人正常值偏小，差异显著，提示牙齿形态与多个牙先天缺失有一定相关性。

The mean caries number in female is higher than male (P.05). The mean missing number of male is higher than female (P.005). Coronary artery stenosis is positive correlated to tooth missing and filling.

在龋齿的平均颗数女生较男生多(P.05)，缺牙的平均颗数男生颗数较女生多(P.005)，冠状动脉阻塞与缺牙及填补有正相关(P.05)。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。