牙

Inside the source apply color to develop process in the tooth in formative of, such as four wreath vegetables deposition is in the tooth essence, will make tooth yellow, brown or dark gray, be called four wreaths plain tooths;If containing fluorine in the drinking water is excessive, may also cause fluorine spot tooth, the tooth noodles presents a white chalk color, the palm tree brown spot piece;If the tooth nerve is bad clay-cold, hemoglobin and germ resolve an outcome to combine to also make tooth black.

内源性着色是在牙齿发育过程中形成的，如四环素沉积在牙本质内，就会使得牙齿变成黄色、棕色或暗灰色，称为四环素牙；如果饮用水中含氟过多，也可能导致氟斑牙，牙面呈白粉笔色、棕褐色斑块；如果牙神经坏死后，血色素与细菌分解产物结合也可使牙齿变黑。

Since the machine speed fast, the strength of the avulsing, the drum in particular for the imprint of the drum and carry it and carry it to remain in force General 16kg than radiograph, clishion always maintained in a clean, open and closed freely, in a pipe pressure, wearless, teeth-axis in the spring of elastic to a value greater than the small spring force in its teeth.

由于机不缓迟，不粘贴辛不小，各滚筒不入格是不抬印滚筒叼牙的叼辛凡是给保留在16kg以上，且牙片、牙垫本末给保留肮脏、开闭自若，处于叼辛陡均、无磨损的精良状况，牙轴边的扭簧的弹辛给不小于各叼牙小弹簧辛的总和。

Results The incidence of wedge-shaped defects reached 97.3 %,and the frequency of involved teeth was:first premolar,second premolar,first molar,cuspid.

结果 该组老年人楔状缺损的发病率为97 。3 %，且随年龄递增；楔状缺损的好发部位和缺损程度第一双尖牙列首位，其次为第二双尖牙，第一磨牙；其中第一磨牙比以往人们认为的尖牙更好发楔状缺损。

Result The model consisted of enamel, dentin, elements pulp, simulated periodontal membrane and simulated alveolar bone.

结果 建立了上颌第一磨牙有限元模型，包括牙釉质、牙本质、牙髓、模拟牙周膜、模拟牙槽骨。

Because this produces peculiar tooth jaw face to misshape, constant expression is mid development undesirable reach cave, length of direction of around of bone of the upper jaw and perpendicular direction height shorten, tooth bend is narrow, the tooth lists jam, occlusive relation is disorder, anterior teeth or complete tooth bend are enclothed instead, before mandible true sex or false sex dash forward. 2 use DO method at the back of art of Jiao Zhi cleft palate in the portion caves at the back of art of abnormal cleft palate in the portion caves abnormal treatment method is very much, if Kettle reports block is mental,raise fight a way, the face guard method that Tind Lund uses, wang Ketao [1] uses Peng body to get together 4 fluorine ethylene fills up repair misshapes this kind etc.

因此产生特有的牙颌面畸形，常表现为面中部发育不良及凹陷，上颌骨前后方向长度及垂直方向高度变短，牙弓狭窄，牙列拥挤，咬合关系紊乱，前牙或全牙弓反覆盖，下颌真性或假性前突。2利用DO术矫治腭裂术后面中份凹陷畸形腭裂术后面中份凹陷畸形治疗方法很多，如Kettle报道枕颏支抗法，Tind lund采用的面罩法，王克涛[1]采用膨体聚四氟乙烯充填修复此类畸形等。

Stomatology doctors found that children 7-12 years old are deciduous, the turn of the permanent teeth, tooth development as well, upper and lower dental contact some teeth too sharp, uneven teeth and maxillofacial, and the resulting high or obstacles Night is caused by the teeth of the important reasons.

口腔科医生发现，儿童在7至12岁是乳牙、恒牙的交替过程，如牙齿发育不好，上下牙颌接触时有的牙尖过高，咬颌面不平，因此造成的高点或障碍点是引起夜磨牙的重要原因。

When we select the abutments, we must pay addi- tional attention to the periodontium of premolar.

在选择固定桥基牙时，双尖牙要特别重视其牙周组织的健康，对于牙槽骨吸收的双尖牙必须增加基牙以减轻其负荷。

Our company produce and sell all kinds of furniture screws, both inside and outside the dental screw, nut and outside the teeth, the word inside and outside the tooth slot screws, furniture screws trough the word, riveting nut, pull nails, rivets, self-locking nylon nut, hexagonal flange nut, stud pressure riveting, riveting up nuts, screws, rivets drawbench, square nuts, hexagon nuts, fittings, furniture screws, bolts, expansion nuts, K nuts, with sets of teeth, plum shrapnel, both inside and outside the teeth, bearings, inverted cap, sleeve and other hardware accessories and related auxiliary steam-driven and hydraulic Riveter Pneumatic Riveter.

本公司生产销售各种规格的家具螺丝，内外牙螺丝，内外牙螺母，一字槽内外牙螺丝，一字槽家具螺丝，铆螺母、拉钉、铆钉、自锁尼龙螺母、六角法兰螺母、压铆螺柱、涨铆螺母、螺钉、拉丝铆钉、方形螺母、六角螺母、管接头、家具螺丝、螺栓、膨胀螺母、K螺母、内套牙、梅花弹片、内外牙、轴承、倒帽、套筒等五金配件及其相关配套的汽动拉铆枪及油压汽动拉铆枪。

Objective We provided the reference for diagnoses in Othodontics of total dental space analysis. Method This study randomly collected 140 Chinese students(60 male, 80 female) who were from eithteen to twenty five years old with third molars completely erupted.

正畸诊断和治疗应考虑全牙齿及其周围环境的影响，解除牙列中各个区域的牙量骨量不调，但目前国内正畸医师在错畸形的诊断、治疗中，比较注重牙弓前、中段的牙量骨量分析，却忽略了牙弓后段的分析[1] 。

Motheds: to select 336 lomars with pulposis or apicitis from the aged and to devide them into two groups. in group the control group,the illed teeth were given only the root canal therapy. in group the experimental group, according to the difference of every root canal, the unobstructed root canals were treated by root canal therapy. while the obstructed ones were given the root canal resinifying, use two kinds of therapy method together to molais' pathological changes.then their curative effects were observed after two year.

选取336例中老年人患有不可复性牙髓炎、牙髓坏死、牙髓钙化、牙内吸收和急、慢性根尖周炎的患牙358颗，随机分为对照组和实验组，对对照组行常规根管治疗，对实验组则根据每个牙齿各根管的不同情况，采用根管-塑化联合治疗，观察2年进行临床评价。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失