磨牙

Three cross-sections were made through crown and gingiva of the model tooth. Curve functions of axial buccal crown and gingiva contour of each section were acquired by means of curve fitting, and the angle of emergence pofile was calculated, which represents the degree of undercut.

以下颌第二前磨牙为研究对象，在牙列模型上通过牙冠部、牙龈作3个纵断面，用曲线拟和的方法得到每个断面的牙齿轴面外形及相应牙龈外形的曲线方程，以此分析两者之间的关系并计算牙冠起始外形角度，即倒凹程度的大小。

Three of the ten were adult denture crowded patients, the others were adults with bimaxillary protrusion. MAS mini-implant were implanted in 15, 16 and 25, 26 separately. The mini-plants were utilized with the rubber chain, ligature silk to move the cuspid to diatal and to adduct the anterior teeth.

收集武汉大学中南医院口腔正畸科就诊成人牙列重度拥挤患者3例，成人双颌前突患者3例，分别在他们15、16和25、26间各植入一枚MAS微型种植体，利用橡皮链，结扎丝和镍铬弹簧等与微植体相连牵引尖牙向远中移动、内收前牙、防止磨牙支抗丧失。

Methods: Mini-implant was used in ten cases as orthodontics anchorage. Three of the ten were adult denture crowded patients, the others were adults with bimaxillary protrusion. MAS mini-implant were implanted in 15, 16 and 25, 26 separately. The mini-plants were utilized with the rubber chain, ligature silk to move the cuspid to diatal and to adduct the anterior teeth.

收集武汉大学中南医院口腔正畸科就诊成人牙列重度拥挤患者3例，成人双颌前突患者3例，分别在他们15、16和25、26间各植入一枚MAS微型种植体，利用橡皮链，结扎丝和镍铬弹簧等与微植体相连牵引尖牙向远中移动、内收前牙、防止磨牙支抗丧失。

It was shown that Fgf8 express in epithelia of milk tooth and limit in enamel knot, but it doesn't express in permanent tooth.

在9 周的人类第一磨牙牙胚的原位杂交显示Fgf8只在乳牙上皮表达，而且局限在釉结节，在恒牙上皮中并没有表达。

It was shown that Fgf8 express in epithelia of milk tooth and limit in enamel knot, but it doesnt express in permanent tooth.

在9周的人类第一磨牙牙胚的原位杂交显示Fgf8只在乳牙上皮表达，而且局限在釉结节，在恒牙上皮中并没有表达。

In all case, centric relationship of canine and 1st molar was obtained, with normal overbite and over-jet of anterior teeth.

全部病例均达到尖牙和磨牙的Ⅰ类关系、牙列整齐、前牙覆覆盖正常。

RESULTS: The fine 3D FEA model of the crown of the maxillary first premolar was constructed successfully.

结果：建立了人上颌第一前磨牙牙冠的精细三维有限元模型，网格划分后的牙冠三维有限元模型：釉质具有154，355个单元，牙本质具有256，304个单元，共有410，659个10节点四面体单元，模型具有非常高的精确度。

(1) The 2% glutaraldehyole pulpotomy has the function of killing bacteria and could cure deep caries and early pulpitis;(2) The curative effects of six months after operation is better than that of three months and of upper jaw is better than that of lower jaw by using 2% glutaraldehyole pulpotomy;(3) The prognosis of 2% glutaraldehyole pulpotomy depends on selecting indication and the patients cooperation in the course of operation;(4) It must be early performed with the root canal therapy that the cases of further developing apicitis, the absorption of root apiex is over 1/3, the pulp necrosis and periapical disease.

(1) 2%戊二醛活髓切断术具有杀菌的功能，对于深龋及早期牙髓炎可以治愈；(2) 2%戊二醛活髓切断术治疗乳磨牙牙髓炎六个月后的疗效明显好于三个月的疗效，上颌组疗效明显好于下颌组；(3) 2%戊二醛活髓切断术的预后取决于适应证的选择及治疗过程中患儿的配合程度；(4)对于进一步发展为根尖炎的病例及根尖吸收超过1/3、牙髓坏死和根尖周有病变者，应及早行根管治疗术。

The improvement in molar relationship and overjet is achieved with foreward of A point,upright and distal movement of the lower posterior teeth.

通过A点的前移，下磨牙的直立和远中移动使磨牙关系和前牙覆盖关系明显改善。

Would like molars, premolars cake something to him.

想磨牙，买点磨牙饼给他。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。