缺牙

结论：安氏II类2分类错牙合与过小侧切牙、釉质发育不良、先天缺牙密切相关。

Conclusion : Angle Class II division 2 malocclusion is closely related to congenital tooth anomalies .

目的用先天性缺牙编码（TAC）及传统缺失牙位方式比较先天缺牙表型及基因型的相关性。

Objective To analyze the correlation between the phenotype and genotype of tooth agenesis using the tooth agenesis code ( TAC ) and the traditional descriptor for missing teeth .

方法选取60例13-21岁的下切牙先天缺失患者作为研究对象。分别对其缺牙数目、Bolton指数、面型情况、牙弓宽度、长度及X线头影测量项目进行分析，并与正常值进行比较。

[ Methods ] Conducting and comparing the Bolton and cephalometric analysis , arch length and width of the 60 patients with congenital lower anterior teeth with that of the normal ones .

结论PAX9或MSX1基因突变导致的先天性缺牙表型有明显差异。

Conclusions PAX9 and MSX1 gene mutation can cause different phenotypes of tooth agenesis .

目的：研究少汗性外胚叶发育不全引起先天缺牙的ED1基因突变。

Objective : To detect ED1 gene mutation in three hypohidrotic ectodermal dysplasia ( HED ) nuclear families .

范德伍兹综合征（VanderWoudesyndrome，VWS，OMIM119300）是一种常染色体显性遗传病。其特征是家族性下唇瘘复合唇裂或腭裂，1／4的患者伴有缺牙（Hypodontia）。

Van der Woude syndrome ( VWS , OMIM 119300 ) is an autosomal dominant craniofacial disorder characterized by pits of the lower lip , hypodontia and cleft lip and / or cleft palate .

先天缺牙可分为个别牙先天缺失（hypodontia）、多数牙先天缺失（oligodontia）和先天无牙症（anodontia）三种类型。

Congenital missing tooth can be divided into hypodontia , oligodontia and anodontia . Oligodontia is defined as absence of six or more teeth .

缺牙数目均在6颗以上，少于6颗时通常被称之为牙齿发育不全（hypodontia）（均不包括第三磨牙）。

The number of missing teeth are more than six , less than six are usually referred to tooth agenesis ( hypodontia ) ( excluding third molars ) .

目前关于附着体义齿用于游离端缺牙的研究，主要集中于针对某一类病例或缺失情况的义齿设计及临床效果评价，以及附着体与传统RPI卡环固位体修复的效果对比。

Most of the existing researches about attachment-retained distal-extension RPD are focused on the effect of denture design and clinical effects for a certain kind of edentulous situation , and evaluation among different retention style .

老年缺牙患者口腔健康与牙缺失情况调查分析

An Investigation on Oral Health of Elderly Patients with Lost Teeth

结果：636例中，缺牙者142例，患病率为22.33%；

Results : The incidence rate of tooth-missing was 22.33 % .

386例老年人缺牙及修复情况分析

An analysis of status of tooth loss and prostheses in 386 seniles

附着体义齿修复游离端缺牙的生物力学分析

Biomechanical Analysis of Distal-extension Removable Partial Dentures Retained by Attachments

老年人缺牙修复情况的分析研究

Analysis of the artificial tooth repair in elderly people

球帽式附着体用于老年游离端缺牙修复的临床研究

Prospective clinical study of ball-socket attachment at distal-extened tooth missing of geriatric patients

背景先天性缺牙是人类最常见的发育异常性疾病之一。

Background Congenital missing teeth is one of the most common human diseases .

结果缺牙率为93.5%。

Results The tooth loss rate was 93.5 % .

无代偿性缺牙对口腔功能的影响

The effects of uncompensated tooth loss on oral functions

结论：老年缺牙患者多伴有合机能障碍；

Conclusion : Occlusal dysfunction is frequently observed in geriatric partial and total anodontia .

先天缺牙是比较常见的牙齿发育异常疾病。

Tooth agenesis is a common tooth dysplasia .

植体支持之固定补缀物将修复病患的大量缺牙与骨缺损以改善病患口腔功能与美观。

Implant-supported fixed prosthesis was designed to restore the edentulous area and improve esthetics .

先天缺牙的种植：辅以正畸治疗的方案和临床应用

Congenitally Missing Teeth Implant : Plan and Clinical Application with the Aid of Orthodontics

对1726名老年前期和老年人的缺牙和修复情况进行了调查。

An investigation on tooth missing and restoration conducted in1726 old pre-geronit people in Wuhan .

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。

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

镇江市1138例老年人缺牙及修复情况的调查分析

An Investigation and Analysis of the Lost and Restored Teeth of 1138 Elders in Zhenjiang City

2112例绍兴市教师缺牙及修复情况的调查分析

An analysis of the state of tooth loss and restorations among 2112 teachers in Shaoxing city

大部分的病例认为先天性缺牙与遗传因素有关。

It is considered that most cases of congenital missing teeth are related to genetic factor .

因此，牙齿自体移植在适当的条件下，可作为解决局部缺牙的治疗方式。

Taken together , autotransplantation provides an alternative solution for a partially edentulous space in certain situations .

研究人员认为，这项研究很有可能最终会帮助缺牙患者重新拥有牙齿。

Researchers believe it 's possible for this research to eventually help people who 've lost teeth .

随着年龄增加，缺牙数增加，根面龋也增加，而血清钙磷含量有所下降。

With the senile growing old , contents of serum calcium and phosphorus become less and root caries occur more .