颏下的

Please put your chin on the rest and your brow against the top rest.

B。好的。A。将下颏放在托架上，额部向前贴紧。

ABSTRACT:OBJECTIVETo study the correlation between anatomic structure of the inferior alveolar nerve canal and dental implantation by measuring mandible innervation esemplarsMETHODSThe intramandibular course of mandibular canal and its dimendion were measured in 15 mandibles with teeth; the relationship between blood vessel and nerve was observed in 5 fresh samples in which the artery was filled; and then the data were analyzed by statisticsRESULTSThe mandibular canal was close to the lingual side and the inferior margin of the mandible, the mandibular canal and the 10mm underside of mandible were parallel in the region of the first and the second molars, it runned outboard to genal aperture when it was hereabout genal aperture, and the blood vessel lay above nerve in the mandibular canalCONCLUSIONIn implant operation performed according to normal anatomy, injury to inferior alveolar nerve may be avoided.

［目的］探讨下颌管的解剖结构与牙种植的关系［方法］选取15具牙列完整的成人离体下颌骨标本和5具经过动脉血管内灌注的新鲜标本，测量下颌骨在每个牙位截面上有关牙槽嵴及下颌管的相关数据，进行统计学分析［结果］牙槽嵴顶以及下方10mm宽度由前向后逐渐增宽；牙槽嵴由上向下逐渐增宽；下颌管位于下颌骨体内下方走行中偏舌侧，并近下颌骨下缘，在下颌第1，2磨牙区下颌管走行与下颌下缘成平行状，在近颏孔处转向外和向颊侧出颏孔；下颌管内血管位于下牙槽神经之上［结论］牙种植术中按正常解剖部位并且侧重颊侧骨板操作，可避免损伤下牙槽神经；如果术中下颌管内突然涌出大量新鲜血液，则提示若继续手术可能损伤下牙槽神经。

ABSTRACT:OBJECTIVETo study the correlation between anatomic structure of the inferior alveolar nerve canal and dental implantation by measuring mandible innervation esemplarsMETHODS The intramandibular course of mandibular canal and its dimendion were measured in 15 mandibles with teeth; the relationship between blood vessel and nerve was observed in 5 fresh samples in which the artery was filled; and then the data were analyzed by statisticsRESULTSThe mandibular canal was close to the lingual side and the inferior margin of the mandible, the mandibular canal and the 10mm underside of mandible were parallel in the region of the first and the second molars, it runned outboard to genal aperture when it was hereabout genal aperture, and the blood vessel lay above nerve in the mandibular canalCONCLUSIONIn implant operation performed according to normal anatomy, injury to inferior alveolar nerve may be avoided.

［目的］探讨下颌管的解剖结构与牙种植的关系［方法］选取15具牙列完整的成人离体下颌骨标本和5具经过动脉血管内灌注的新鲜标本，测量下颌骨在每个牙位截面上有关牙槽嵴及下颌管的相关数据，进行统计学分析［结果］牙槽嵴顶以及下方10mm宽度由前向后逐渐增宽；牙槽嵴由上向下逐渐增宽；下颌管位于下颌骨体内下方走行中偏舌侧，并近下颌骨下缘，在下颌第1，2磨牙区下颌管走行与下颌下缘成平行状，在近颏孔处转向外和向颊侧出颏孔；下颌管内血管位于下牙槽神经之上［结论］牙种植术中按正常解剖部位并且侧重颊侧骨板操作，可避免损伤下牙槽神经；如果术中下颌管内突然涌出大量新鲜血液，则提示若继续手术可能损伤下牙槽神经。

Objective:To investigate the effects of extraction to the morphology of symphysis and the relationship between lower incisors retraction and the changes of the symphysis by evaluating the cephalograms of patients with Angle Class II Division 1 malocclusion.,in order to provide a reference to clinical treatment.

目的： 通过对安氏Ⅱ~1类错拔牙矫治前后的X线头影测量分析，观察矫治前后颏部形态的变化，并探讨下切牙内收量与颏部厚度和倾斜度变化之间的相关关系，以期为临床矫治设计提供一定的参考。

Results:(1) the mark of glabellar point, subnasal point,stomoschisis point, and supramentale fit the conception of "the golden point".

结果：新疆维吾尔族美貌女性面部、五官比例的特点：（1）眉间点、鼻下点、口点、颏上点4个界点中除颏上点以外，其余界点与&黄金点&基本相符。

This lends a hypotonic appearance to this area when, in fact, the upper portions of the canine and

此会给于此区呈现低张力外观，事实上，当犬齿的上部与口轮匝肌是紧绷的时，在吞嚥期间上唇是无法拉下将口关闭起来，取而代之的是下唇需拉上来而使颏肌区变平。

This lends a hypotonic appearance to this area when, in fact, the upper portions of the canine and orbicularis oris muscles are tensed; the upper lip no longer drops down to close the mouth during swallowing, but, instead, the lower lip rises with a flattening in the region of the mentalis muscle.

此会给于此区呈现低张力外观，事实上，当犬齿的上部与口轮匝肌是紧绷的时，在吞嚥期间上唇是无法拉下将口关闭起来，取而代之的是下唇需拉上来而使颏肌区变平。

For class III malocclusion there are no significant differences in Ls-SGo,Li-SGo,upper lip length , lower lip length , Cm-Sn-Ls, upper lip angle of inclination and Li-H line . There are significant differences in lower lip angle of inclination , mentolabial sulcus angle , upper lower lip angle , H angle.

安氏Ⅰ类错合患者与安氏Ⅲ类错合患者相比，在上唇突点到SGo距离、下唇突点到SGo距离、上唇长、下唇长、鼻唇角、上唇倾角和下唇突点到H线距这些测量指标上无显著性差异；其他表示唇部形态和位置的指标，下唇倾角、颏唇沟角、H角、上下唇角都有显著性差异。

But the value of H angle is smaller than class I malocclusion . Campared with the data of class II malocclusion , for class III malocclusion there are significant differences in LsL , LiL , lower lip angle of inclination , mentolabial sulcus angle , H angle , upper lower lip angle , Ns-Sn-Ls . For class III malocclusion the value of LsL is shoter than class II malocclusion , but the value of LiL is longer than class II malocclusion . The value of lower lip angle of inclination , mentolabial sulcus angle , upper lower lip angle is bigger than class II malocclusion .

安氏Ⅱ类错合患者与安氏Ⅲ类错合患者相比，在上唇长、下唇长、上唇倾角、下唇倾角、颏唇沟角、H角、上下唇角和软组织轮廓这些指标有显著性差异；安氏Ⅱ类错合患者的上唇长比安氏Ⅲ类错合患者的长、安氏Ⅱ类错合患者的下唇长比安氏Ⅲ类错合患者的短；安氏Ⅱ类错合患者的上唇倾角和H角比安氏Ⅲ类错合患者的大，安氏Ⅱ类错合患者的下唇倾角、颏唇沟角和上下唇角比安氏Ⅲ类错合患者的小。

Results showed depth Of implantation greatly influenced the periimplant bone stress.Making the implants deep into lower bonier cortex could make stress transfer more evenl...

结果表明：种植体底部是否深至下颌下缘皮质骨，对种植体－支架应力的影响不大，而对周围骨的应力影响较大，在双颏孔间区将种植体深至下颌下缘皮质骨，更有利于应力均匀分布。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。