牙缺失

Methods: A tentative discussion on 19 patients with overlay abutment covered with metal crown cap, and the dentition defects of a few missing of upper teeth and serious defects of lower teeth in restoring of mandible complete denture was made.

通过对19例患者覆盖基牙作金属顶冠、下颌全口义齿修复上颌牙齿少量缺失，下颌牙齿大量缺失的牙列缺损问题进行了初步探讨。

METHODS: Severely-decayed tooth used for abutment of removable denture were made routinely root canal therapy and repaired with post and core crown.

将选作基牙的残冠残根常规根管治疗后，桩核冠修复，缺失牙再行可摘义齿修复。

The BLB implant system is suitable for the defect of denture or the edentulous jaw in the clinics.

BLB种植体植入后骨整合形成良好，适合于常见的牙列缺损及牙列缺失的种植修复，是一种较理想的种植体。

Results 12 single lower incisor absence patients, of whom 6 combined with tooth extraction;3 used interproximal enamel stripping and the rest 3 combined with prosthetics;16 double lower incisors absence patients,of whom 10 combined with tooth-extraction and the rest 6 combined with prosthetics.

结果：12例单个下切牙先天缺失患者中，有6例结合减数矫治，3例采用邻面去釉技术，3例结合修复方法；16例两个下切牙先天缺失患者中，10例减数矫治，6例采取缺牙修复。

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

先天缺牙可分为个别牙先天缺失、多数牙先天缺失和先天无牙症三种类型。

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？

Roast the porcelain tooth 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 doing to roast a porcelain tooth, Be roast the porcelain tooth props up of good tooth, gum also because of atrophying but loose how do?

烤瓷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，如果做了烤瓷牙后，作为烤瓷牙支撑的好牙齿，牙龈也因为萎缩而松脱怎么办？

The stellate reticu-lum and the dental follicle of the underlying permanent tooth seems to be important for the deciduous root re-sorption. However, primary teeth without a permanent successor eventually exfoliates as well. Our current understanding on the underlying mechanisms is slim.

继承恒牙的牙囊和星网状层似乎在乳牙根的吸收中起着重要作用，而继承恒牙先天性缺失的乳牙根吸收最终仍会发生，其机制目前尚不明了。

The study aims to synthesize a new denture base material to complemete the electret of teeth-extracted alveolar bone and stimulate bone growth towards the denture base when masticating and inhibit or rimit the RRR.

本课题研制新型改性义齿基托，在修复牙列缺损或缺失时通过驻极体效应和压电效应，补充患者失牙区局部驻极态的丧失，利用咀嚼运动产生的微电流刺激骨向基托方向定向生长，抵御或缓解牙槽骨的吸收。

Results:When wide-diameter implant or two-implant were used to replace single mandibular molar, the stress of implant-bone interface was much lower than that of standard-diameter implant restoration. Comparison between wide-diameter implant and two-implant replacement showed that the former created lower stress. The difference was more obvious under oblique loads.

结果：与单个标准直径种植体修复相比，采用单个大直径种植体或双种植体修复单个缺失下颌磨牙均可使种植体-骨界面应力值大大降低；而采用单个大直径种植体修复单个缺失磨牙时骨界面应力值相对较小，以斜向加载时更为明显。

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。