牙骨

Methods: The study included 10 patients (Male: 4, Female: 6; average age: 41.5) accessioned during May 2007 to August 2009 in Peking University School of Stomatology. The provisional restorations were delivery on implant after 3-6 months healing period of the implant.

2007年5月至2009年8月在北京大学口腔医院种植中心接受上颌前牙种植修复的患者10人（男4人，女6人，平均年龄41.5岁）共14个牙位，种植体骨结合完成后采用种植体支持的暂时冠对牙龈成型3~6个月。

METHODS: Decalcified material including the alveolar bone was sectioned and stained by means of immunohistochemistry for detection of the neurofilament protein.

大鼠磨牙及其牙槽骨脱钙后切片并行神经丝蛋白免疫组织化学染色。

gap by law easy to use, easy to grasp, apply to the relatively high crown boneless resistance, resistance to a small adjacent teeth, the roots for the integration of the root or the root bifurcation cases, such as low lower the removal of impacted wisdom teeth; split crown law Requirements, flexibility in operation, more suitable for medium and low impacted significantly ditch and development, the root fork or a higher resistance to a larger adjacent teeth, and other cases, the lower-third-molar extraction.

结论增隙法操作方便、易于掌握，比较适用于高位、冠部无骨阻力、邻牙阻力小、根部为融合根或根分叉很低等情况下下颌阻生智齿的拔除；劈冠法要求条件高、操作灵活，比较适用于中、低位阻生且发育沟明显、根分叉较高或邻牙阻力较大等情况下下颌阻生智齿的拔除。

They are harmful to abutments, especially when the bone was absorbed.

特别是当基牙牙槽骨高度降低时，这种危害更加严重。

There are a lot of arguments about whether the teeth with reduced bone sup- port could act as abutments of fixed bridge.

关于牙槽骨吸收的牙齿能否作为固定桥的基牙，目前还存在很大的争议。

When selecting the abutments, the teeth with above twenty percent of root bone reduction must be considered cautiously.

在固定桥基牙的选择时，对于牙槽骨吸收超过根长20％的牙齿要慎重考虑。

The upper dens malarias and periodontal tissue slices were observed under the light microscope and transmission electro microscope,and the X-ray dental films were taken and measured with digitization dental scanning apparatus and its software.

目的；观察丹参复合生物膜在正畸牙齿移动中对牙槽骨高度和密度的影响，探讨丹参复合生物膜影响正畸牙牙周组织改建与牙齿移动的机理。

Hongye Machinery Factory production of machinery and equipment are widely used in metal processing production: Qi mouth edge, flat crimping, both inside and outside vertical crimping, pressure Blankholder bones, stretch forming, anti-side, crossed, metal ring inside the edge volume, Hemming, sand at the end, both inside and outside the sanding, the appearance of Belt Line, both inside and outside the skin polished, red-shaped punching, vol cylindrical, straight seam welding, weld line pressure, girth welding, pressure ring weld, sheet metal coated oil, pressure spiral teeth, cars spiral teeth.

鸿业机械厂生产的机械设备广泛用于五金制品加工生产：齐口切边、平面卷边、垂直内外卷边、压边压骨、拉形、反边、划线、金属圈卷内边、包边、砂底、内外砂光、外表砂带线、内外去皮抛光、冲形冲孔、卷圆筒、直缝焊、压直线焊缝、环缝焊、压环形焊缝、金属片涂油等、压螺旋牙、车螺旋牙。

Periodontal disease is one of the most common disease in oral cavity, which is the reason of defect of dentition second only than dental caries. It results in junctional epithelium turn root periodontal pocket emerge, tooth mobility, aversion and amotic. Among the total, the alveolar bone shrikes to root can not reversible.

牙周病是口腔常见病之一，是仅次于龋病导致牙列缺损的第二大原因，造成结合上皮根向迁移、牙周袋形成、牙齿松动、移位和脱落等病理改变，其中牙槽骨向根方的退缩是不可逆的。

Tooth eruption ; Osteoprotegerin ; Tooth germ ; Dental sac

牙齿萌出；骨保护素OPG ；牙胚；牙囊

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％。