牙

Methods:Thirteen class Ⅱ patients (aged 10～13 years,male 6,femal 7) with mandible retrusion and slight maxillary protrusion were included.Radiographs of the left hand and wrist showed the patients were at the pubertal or pre-pubertal stage.All the patients were treated with the mandibular protraction appliance.

选择13例AngleⅡ类错牙合病人，男6例，女7例，最大13岁，最小10岁，均为替牙晚期或恒牙早期。X线头影测量显示主要为下颌后缩及轻微上颌前突，左手腕片显示为生长发育高峰期或高峰前期，所有病人用下颌前伸矫治器进行治疗。

In this study, we use Computer Aided Diagnosis Axiogragh recorded condylar movement of normal occlusion and Angle class two division one subdivision malocclusion with mandibular retrusion every twenty-five during mandible open and close, protrusion and retrusion, and medio-free movement. Then we analysis the deference in order to find out the characteristic of condylar movement of Angle class two division one subdivision malocclusion with mandibular retrusion and the change regularity among befor and after functional appliance treatment.

本研究以正常牙合和下颌后缩型安氏Ⅱ类1分类错牙合各25名为研究对象，采用髁突运动轨迹轴图描记仪(Computer Aided Diagnosis Axiogragh)记录其下颌在开闭口、前伸后退和侧方运动时髁突的运动情况，对比分析下颌后缩型安氏Ⅱ类1分类错牙合的髁突运动轨迹特征及其功能矫治前后髁突运动轨迹的变化。

Their BMD of anterior aveolomaxillary bone in five set sites were measured with Digoro computerized dental roentgenographic.

采用法国产Digoro电脑牙片机多点测定30 6例18～6 5岁正常成年人的上前牙牙槽骨骨密度值。

Biochemical function, including biological morphology and correlation with adjacent soft and sclerous tissues, of the implanted teeth becomes a hot topic in modern tooth implantation.

然而现代牙种植越来越强调种植牙的生物学功能，包括种植牙的生物学形态，以及与相邻软硬组织的关系和相互作用。

After 8 weeks growth, the polarization became more obvious in the pre-ameloblast and pre-odontoblast. Cells became high stylolitic shape and small amounts of dentin formation were found in the future of dental cusp region.

生长8周时，前成釉质细胞和前牙本质细胞的极化变得更加明显，细胞已变成高柱状，在未来牙尖区域可发现少量牙本质的形成。

The four powerpoint slides explains how it works and the word document is basically a story script surrounding the use the technology in everyday life. The enabled person is someone using the Bluetooth technology while the unenabled person is not as efficient without the Bluetooth.

四幅幻灯片说明布鲁土斯技术如何运作，文字说明主要讲述关于在日常生活中使用蓝牙技术的蓝牙技术的受益者，无能为力的人指的是没有应用蓝牙技术工作低效的人。

Results The accurate position of bone impacted and unerupted teeth in the complex maxilla or mandible anatomy structure were clearly reflected by 3DX-CT scan and 3D reconstruction. Nineteen impacted and unerupted teeth got anticipate effects by formulating different treatments according to 3DX-CT imaging data.

结果 牙科三维CT能清晰显示埋伏牙的形态、大小、位置、长轴角度、与邻牙的结构关系等。19枚埋伏牙依据牙科三维CT扫描提供的影像学信息制定不同的治疗计划，均取得了预期的临床效果。

Meanwhile, the blood supply to the pulp and the roots of the teeth atrophies, and the flow of saliva diminishes; the gums tend to become inflamed and pull away from the teeth, exposing the base, making them unstable and elongating their appearance, especially the lower ones.

与此同时，供给牙髓和牙根的血液也会减少，唾液分泌也会降低；牙龈会发炎，同牙齿脱离，暴露出牙基，使得露出的牙齿变得不稳定，尤其是对于那些镶牙的下半部更是如此。

The gum atrophies to still cause the tooth dew outside the root, the surface of tooth root doesn't have tooth enamel quality, not only be easily worn away while brushing teeth once there being no the protection of guming, in the meantime to cold, hot and sour incitement very sensitive, the mouth cavity medical science is called "tooth essence allergy", people often mistaken for this kind of phenomenon to peep out tooth nerve to cause ache, and this is incorrect.

牙龈萎缩还导致牙根外露，牙根的表面没有牙釉质，一旦没有了牙龈的保护，不仅容易在刷牙时受到磨损，同时对冷、热、酸的刺激非常敏感，口腔医学称为&牙本质过敏&，人们常把这种现象误认为是露出牙神经导致疼痛，这是不对的。

The false teeth usually needs good solid Chi to do to prop up, but the part of general imperfection tooth, in addition to on business so collision and cause of drop a tooth, rest regardless is because the tooth week disease or shed off naturally, above 90%s all drops a tooth because the gum atrophies, this has an antinomy, if after cheating, Be roast the porcelain tooth props up of good tooth, gum also because of atrophying but loose how do?

假牙通常需要好的固齿来做支撑，但是一般缺失牙齿的部位，除了因事故碰撞而导致的掉牙，其余无论是由于牙周病或者自然脱落，90％以上都是由于牙龈萎缩而掉牙的，这就有个矛盾，如果做了假牙后，作为烤瓷牙支撑的好牙齿，牙龈也因为萎缩而松脱怎么办？

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐