前侧片的

The screw entry point was located at the tip of transverse process. The average inclination angle should be 10°-20° headward and 30°-40° toward neutral line respectively. The screw was inserted and entered into the vertebral body along the external cortex of pedicle. The integrity of cortical bone around screws, the distance to segmental blood vessels and the penetration of cortex were observed after operation to evaluate the accuracy and safety of screw placement. Among 160 thoracic pedicle screws that were implanted in 34 cases, 148 screws (92.5%) were accurately inserted inside the costotransverse unit, and 12 screws (7.5%) were misplaced according to the image of X-ray and CT thin-slice scan.

应用椎弓根外内固定技术2004/2007年在中山大学附属第三医院骨科治疗34例患者，固定前采用CT加密扫描测量进钉点、进钉点至椎体前缘的深度、进钉角度和直径，固定中椎弓根钉入点为横突尖，进钉方向为平均向头侧倾斜10°~ 20°、与中线成角30°~40°，顺椎弓根外侧皮质进入椎体，固定后CT加密扫描观察螺钉周围的皮质骨是否完整、是否靠近节段血管、是否穿透皮质骨，评价置入钉的准确性和安全性。34例患者共置入160枚胸椎椎弓根螺钉，固定后CT加密扫描和X射线片观察到148枚(92.5%)螺钉置入准确，12枚(7.5%)螺钉发生错置。

From 2004 to 2007, 34 cases were treated with extrapedicular screw fixation in Department of Orthopaedics, Third Affiliated Hospital of Sun Yat-sen University. The screw entry point, angle, depth and diameter were measured and defined on the thoracic vertebrae pedicle by CT thin-slice scan in standard prone for all cases before operation. The screw entry point was located at the tip of transverse process. The average inclination angle should be 10°-20° headward and 30°-40° toward neutral line respectively. The screw was inserted and entered into the vertebral body along the external cortex of pedicle. The integrity of cortical bone around screws, the distance to segmental blood vessels and the penetration of cortex were observed after operation to evaluate the accuracy and safety of screw placement.

应用椎弓根外内固定技术2004/2007年在中山大学附属第三医院骨科治疗34例患者，固定前采用CT加密扫描测量进钉点、进钉点至椎体前缘的深度、进钉角度和直径，固定中椎弓根钉入点为横突尖，进钉方向为平均向头侧倾斜10°~20°、与中线成角30°~40°，顺椎弓根外侧皮质进入椎体，固定后CT加密扫描观察螺钉周围的皮质骨是否完整、是否靠近节段血管、是否穿透皮质骨，评价置入钉的准确性和安全性。34例患者共置入160枚胸椎椎弓根螺钉，固定后CT加密扫描和X射线片观察到148枚(92.5%)螺钉置入准确，12枚(7.5%)螺钉发生错置。

Lateral roentgenograms of the lumbar spine and the hip joint were obtained in the upright position to determine pelvic inclination, sacral slope angle, lumbar lordotic angle (L1-L5), disc angle of L5/S1, and pelvic angle (by Jackson's method).

所有病例都拍摄了竖立位腰椎和髋关节侧位片，从而确定他们的骨盆倾斜度、骶骨倾斜角、腰椎前凸角（L1－L5）、L5/S1椎间盘成角和盆腔角。

Through comparing and analyzing the photographs of Cephalometrics before orthodontics, after orthodontics and two years after orthodontics, we can probe into the optimal period for treating AngleⅢmalocclusion osteal cross bite patients with maxillary protraction therapy and the long period of stability after the accomplishment of orthodontics, and it can provide reference and theoretics for clinic practice and experiments.

通过对不同年龄组患者矫治前、矫治结束时及矫治结束两年后的头颅侧位片进行定点、描绘、测量、比较分析，进而探讨上颌前方牵引治疗安氏Ⅲ类骨性反牙合的最佳矫治时机以及矫治结束后的长期稳定性，为进一步的临床实践与实验研究提供理论依据。

A group: to measure the length of root canal by Root ZX, prepare the root canal and test the trial point for a best position of the major Gutta Percha Point in root canal obturation with lateral compaction, then take X-ray photos.

随机选择需行根管治疗术的单根管恒前牙、双尖牙 2 30颗，分为A、B两组，A组采用RootZX 根管测量仪测量根管长度，根管预备后，根管充填时加试尖步骤，调试出最适主尖后侧压充填根管，摄牙片

Objective To explore the application value of digital periapical film to preoperative assessment of removing intracanal separated instruments.

目的 探讨数字根尖片在术前评估根管内折断器械取出难度和根管侧穿发生中的应用价值。

Patchy hyperdensities are present in both occipital lobes and in the precentral and frontal subcortical white matter.

图2。 MRI 的T2像于双侧枕叶、中央前回及额叶的皮质下白质见斑片状高信号病灶。

The characteristic of protargol impregnated specimens was: the single kinety and complex kineties entered the vestibular after they rotated 1.5 coils. the peniculus 3 composed of 3 rows of kineties, of which one near the peniculus 2 was stopped at the joint of peniculus 1 and 3 and the end of the outer row of peniculus 1 had extraversion behavior.

蛋白银制片特征为：单毛基索和复毛基索旋转1.5圈后进入前庭，第3咽膜(P3)起始段由3列毛基索组成，其靠近P2侧的一列毛基索在P1与P3的汇合处终止，P1最外一列的末端外倾。

Methods:1092 children from three primary school of FAW community include pre-school classes and Grade one and two classes received epidemiologic examination,if obstructive sleep apnea synd- rome was identified,pharyngeal check-up,fibrous endo- scopic,lateral x-ray,acoustic impedance or sleep oxygen saturation studies.

在长春一汽集团社区内的3所小学内的学龄前班、一年级、二年级内共1092名儿童进行流行病学调查，并对存在睡眠中呼吸暂停的儿童进行，咽部检查，纤维咽镜，鼻咽侧位片，声阻抗，夜间血氧监测检查。

Methods:TMJs of 7 corpses were dissected and studied anatomically.The anterior inclining angle of external auditory canal was measured on 20 CT films which show the symmetry of bilateral external auditory meatus and the central position of nasal septum.

解剖测量7具国人尸体头颅的TMJ解剖结构及其与邻近解剖标志和重要神经血管的解剖关系，并依据20张显示鼻中隔居中，双侧解剖结构对称的CT片测量外耳道前倾角。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。