弓

Guangdong Guangzhou 510620, ChinaAbstract: Objective: To investigate the effect for treatment of thoracolumbar vertebral burst fractures by the method of pedicle screw fixation the vertebral body via pedicle with quantify autogenous bone and marrowbone.

目的：评价椎弓根钉系统内固定并经椎弓根植入定量自体松质骨和骨髓治疗胸腰椎爆裂性骨折的临床效果。

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。

After dealing with the CT image of pedicle screw with interpolation numberical method, for pedicle screw of gradeⅠ,CT had a positive predictive value of 52.7%, a negative predictive value of 94%.,a sensitivity of 67% and a specificity of 94%; for pedicle screw of gradeⅡ, CT had a positive predictive value of 75%, a negative predictive value of 100%.,a sensitivity of 100% and a specificity of 94%.

结果：采用"低窗位、高窗宽"原则处理CT影像后，CT对于Ⅰ度椎弓根螺钉的敏感度为33%、特异度为87%、阳性预测值为32%、阴性预测值为88%。CT 对于Ⅱ度椎弓根螺钉的敏感度为100%、特异度为88％、阳性预测值为60%、阴性预测值为100%。Kapper值为0.603。

Their bows and strong armour allow them to outshoot Asiatic horse archers, but they are equally ready to mix it up at close quarters.

强弓硬甲令他们与亚洲弓骑兵交手颇占优势，同时这些骑兵近身格斗亦同样出色。

Maxillary teeth were retracted,and the overjet and overbite were adjusted to right relations,and soft convex tissues face type was improved.

上颌牙齿前突减数矫治，有助于上颌和上牙弓的突度减小，使软硬组织面型之间的形态结构一致，特别对上牙弓突度的改善是肯定而持续的。

Methods The sample consists of 96 patients with maxillary protrustion,overbite and crowding,during the period of treatment,the segmental arch technique was used in one or some stages of the courses of correction.

对96例牙列拥挤和前突型深覆患者应用三件式、二件式、单件式片段弓矫治技术进行治疗，在矫治过程中应用生物力学原理分析、研究了片段弓的力学机理。

He laid the notch of the arrow on the oxhide bowstring, and drew both notch and string to his breast till the arrow-head was near the bow; then when the bow was arched into a half-circle he let fly, and the bow twanged, and the string sang as the arrow flew gladly on over the heads of the throng.

他运气开弓，紧捏着箭的糟口和牛筋做就的弓弦，弦线紧贴着胸口，铁的箭镞碰到了弓杆。他把兵器拉成了一个拱环，借大的弯弓鸣叫呻喊，弦线高歌作响，羽箭顶着锋快的头镞飞射出去，挟着暴怒，呼啸着扑向前面的人群。

The result showed that, in control group, the proportion of palatal suture's expansion in total arch expansion was 70%. However, the figure was 95% in the experimental group.

通过结果显示，对照组中，腭中缝扩大量在整个扩弓量占的比例为70%；而在实验组中，腭中缝扩大量在整个扩弓量占95%以上。

The research on tetracycline fluorescent staining method before and after palatal implant anchorage was applied in expanding narrow dental arch.

为了更好的观察扩弓前后腭中缝宽度的增加在整个扩弓量中占的比例，我们设计实验二。

When Pandarus had strung his bow he laid it carefully on the ground, and his brave followers held their shields before him lest the Achaeans should set upon him before he had shot Menelaus.

潘达罗斯把弓的一角抵在地上，弯起弓架，上好弦线；有人把盾牌挡在前面，那些勇敢的伙伴，以防阿开亚人善战的儿子们突然站起，在他放箭

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。