牙槽后的

Objective: Stress levels of the surface of alveolar bone around bridge abutment of posterior fixed bridge were studied.

目的：研究下颌后牙固定桥基牙周围牙槽骨表面的应力状态。

Then, it is gradually decreased from first bicuspid to second bicuspid, first molar, which are 3.96mm, 3.62mm and 2.95mm, respectively.

上下牙列从尖牙向后，牙尖高度值和托槽粘贴高度值呈逐渐减小的趋势且依次减小约0.5mm。

Objective To evaluate the most effective method of fluoride application to prevent decalcification of enamel before,during and after etching in orthodontic treatment.

目的探讨氟化物在正畸治疗中预防牙釉质脱矿的最佳使用方法。方法制备正畸拔除的前磨牙96颗，随机分成4组，分别为对照组及酸蚀前、中、后用氟组，粘结托槽后，将每个样本分别放入装有2ml酸性人工唾液的试管。

Based on this background, maxillary central incisors was prepared as residual roots model, the materials which has the similar physical properties and capabilities as that of the alveolar bone and periodontal membrane respectively were chosen.

基于上述情况，本实验以人离体上中切牙制备实验模型，以力学性能近似的材料模拟牙槽骨、牙周膜和桩冠修复后的上前牙，制作与上前牙口内受力角度相同的夹具及压力头，形成加载测试系统。

All the patients with 8-11 mm height of residual bone in the posterior maxilla underwent sinus floor elevation and implant placement using osteotome without any bone grafts simultaneously.

患者均因上颌后牙种植区牙槽嵴顶至上颌窦底之间的剩余骨高度在8～11mm，无法植入足够长度的种植体，因而采用上颌窦底冲压法局部提升上颌窦底骨板及黏骨膜，提升幅度为2～5mm。

Later on of inside in several days, grow proud flesh organization inside the nest hole, slowly fill with this wound, the later nest hole grows gradually even, until the wound completely heals, the wound after healing the tooth slot bone still needs an absorption process, to two months hereafter then can stabilize.

过后的几天里，窝洞内生长肉芽组织，慢慢地填满这个创口，以后窝洞逐渐长平，直到创口完全愈合，创口愈合后牙槽骨还需有一个吸收过程，要到两个月以后才能稳定。

METHODS: From January 2000 to May 2002, 52 cases with various types of bone defect were treated with tissue engineered bone, which was constructed in vitro by allogeneous osteoblasts from periosteum 1 x 10(6/ml with bio-derived bone scaffold following 3 to 7 days co-culture. Among them, there were 7 cases of bone cyst, 22 cases of non-union or malunion of old fracture, 15 cases of fresh comminuted fracture of bone defect, 4 cases of spinal fracture and posterior route spinal fusion, 3 cases of bone implant of alveolar bone, 1 case of fusion of tarsotarsal joint.

2000年1月～ 2002年1月，用同种异体骨膜来源的成骨细胞 1×106 / ml与生物衍生骨支架材料构建的组织工程骨，经体外培养 3～ 7天后，植入修复52例各种类型的骨缺损，其中骨囊性病变7例，陈旧性骨折不愈合或畸形愈合 2 2例，新鲜粉碎性骨折伴骨缺损 15例，脊柱骨折后路植骨融合术4例，牙槽骨植骨 3例，足跗中关节植骨融合 1例。

Methods:The edentulous patients of senile males and postmenopausal females were selected.All the edentulous subjects were divided into two groups according to the degree of RRR of mandibles: well-rounded ridge group and atrophied ridge group; The BMD of mandibular angle and coxofemoral region (femoral neck,trochanter,and wards triangle) of all subjects were measured by dual energy X-ray absorptiometry.The BMD were compared between well-rounded ridge group and atrophied ridge group in the same sex group.

将60岁以上男性和绝经后女性无牙颌患者依据下颌剩余牙槽嵴吸收程度分为丰满组和非丰满组；采用双能X线吸收法，测量全部研究对象右侧髋部与左侧下颌角的骨密度；在同性别组内对比丰满组和非丰满组间下颌角和髋部骨密度的差别。

Objective: The purpose of this study is to establish a periosteal distraction model on rabbit mandiblar ramus, to observe the formation of newly formed bone and its structure in each phase after distraction of periostea, to observe the changes of periostea after being secondary to distraction forces, to investigate the possibility of osteogenesis by periosteal distraction in oral and maxillofacial region, and to study the possibility of a new restoration method of clincal alveolar and other bony defect.

目的：本研究在兔下颌升支建立骨膜牵张成骨模型，观察牵张骨膜后，在骨膜下新骨的形成，以及新骨在各个阶段的结构，同时观察了骨膜受到牵张力后的改变，研究骨膜牵张在口腔颌面部成骨的可能，为牙槽骨缺损及其他口腔颌面部骨组织缺损探讨新的重建方法。

In this study, the pontic width was designed to three types: normal, one third width reduction, and one second width reduction. We developed the pontic reduction model based on the primary model in the first part of this paper. Two kinds of force condition were simulated.

在论文第一部分所建立的下颌后牙固定桥三维有限元计算模型的基础上，建立五种不同牙槽骨高度水平的基牙的固定桥减径模型，模拟两种固定桥典型受力状况进行计算分析。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。