恒牙

Objective To study the effects of environmental and genetic factors on dental crowding, and to further study on the influencing factors on permanent dentition.

目的 通过双生子研究遗传和环境因素对恒牙列拥挤形成所起的作用，以进一步研究恒牙列拥挤的影响因素。

Purpose: The purpose of this study was to investigate the eruption sequence of the first permanent molar and mandibular incisor in Taiwanese children.

研究目的：本研究之目的在探讨台湾儿童恒牙萌发之情形，以及第一颗萌发之恒牙究竟是第一大臼齿或是下颚门牙。

Child's deciduous teeth in the 2-year-old half-a-chai, to 6-year-old, in the final after a deciduous, up and down about a total of four laniary grow, this is the first eruption, the use of the oldest permanent teeth, which four of six age of teeth will not change.

孩子的乳牙在2岁半出齐，到6岁左右，在最后一颗乳牙后面，上下左右共长出四个大牙，这是萌出最早、使用最久的恒牙，这四颗六龄牙以后不会再换。

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。

The expression of Fgf8 in the bud of permanent tooth is the same with it in mouse, but in milk tooth its different from mouse.

Fgf8在恒牙牙蕾与小白鼠牙蕾表达情况一致，但是在乳牙帽状期的表达情况与小白鼠不同。

The average age of first permanent tooth eruption in boys was 2 months later than that of in girls.

第一颗恒牙萌发之平均年龄为6岁又1.6个月，男生第一颗恒牙萌发之时间比女生晚1.6个月。

This study concludes that the first erupted permanent tooth in Taiwanese children is either mandibular incisor or mandibular molar.

本研究显示，恒牙第一大臼齿及下颚门牙有相同的机会成为第一颗萌发出来之恒牙。

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。

Unilateral posterior crossbite is one of the most frequently occurring malocclusion in the mixed and early permanent dentitions.

混合牙列和早期恒牙列期单侧后牙反牙合是临床较常见得一类错牙合，绝大多数患者约80％伴有下颌偏斜，上下中线不齐。

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％。