椎关节

To evaluate the biomechanical stability of lumbar intact specimen, anterior lumbar interbody fixation specimen, ALIF specimen fixed with pedicle screw and ALIF specimen fixed with translaminar facets screw.

目的］ 对腰椎完整标本、单纯腰椎前路椎间融合术、ALIF分别行椎弓根钉固定及经椎板关节突螺钉固定4种状态进行测试，比较生物力学稳定性。

There were 47 cases of odontoid process fracture (38 cases with fresh fractures, 9 cases with timeworn fractures),45 cases of Hangman fracture （28 cases with fresh fractures, 17 cases with timeworn fractures）, 24 cases of torn transverse ligament of atlas, 23 cases of congenital deformity, 19 cases of unilateral fracture of vertebral arch of atlas, 17 cases of rheumatoid arthritis, 9 cases of unilateral fracture of articular process, 3 cases of Jefferson fracture with chronic instability, 4 cases of spinal tumor.

临床诊断；齿突骨折47例，其中新鲜骨折38例，陈旧性骨折9例，Hangman骨折45例，其中新鲜骨折28例，陈旧性骨折17例，寰椎横韧带断裂24例，先天畸形23例，寰椎单侧椎弓骨折19例，类风湿性关节炎17例，一侧关节凸骨折9例， Jefferson骨折并慢性不稳3例，肿瘤4例。

In another cadaveric study, Adams and Hutton58found that the lumbar facet joints resist approximately16% of the intervertebral compressive force when standing erect versus near 0% when sitting, which helps explain the high intra discal pressures during unsupported sitting.59 Finally, after conducting in vitro experiments measuring induced loads on cadaveric lumbar facets, Lorenz et al.60 concluded that with increasing compressive loads, the absolute facet loads increases only slightly, so that the proportion of the axial burden borne by the l-z joints actually decreases with increasing stress.

另一项尸体标本的研究中，Adam和Hutton发现，当直立站立时，小关节承担了逐渐压力的近16%，而坐位时进0%，这解释了为什么在无支持的坐位时椎间的压力非常高。最后，Lorenz在尸体标本加载负荷后测量小关节的应力后，认为增加压力负荷时，小关节间的应力仅轻微增加，因此在轴向负荷中，小关节承担的比例实际随着应力的增加而减少。

It has been suggested that the architecture of the lower lumbar vertebrae and sacrum (e.g., inadequate separation between the inferior articular process of L4 and the superior articular process of L5, a wedged-shape interfacet region of L4, a more frontally oriented lumbar facet, and a wider sacrum), pelvic orientation and lumbosacral parameters (e.g., pelvic incidence, sacral table angle) may play a role in the development of spondylolysis.

低位椎体和骶骨的结构（如L4下关节突与L5上关节突间隔不足，L4下关节突成楔形，腰椎小关节方向过分偏额面方向，骶骨过宽），骨盆方向和腰骶段的参数（如骨盆影响和骶骨水平角）可能在脊柱滑脱的发展中扮演重要角色。

The intravertebral vacuum phenomenon was first described by Kümmel and is also known as delayed vertebral collapse or vertebral pseudarthrosis.

椎体内真空现象最早由Kümmel描述，也称作迟发性椎体塌陷或椎体假关节形成。

CT was a reliable method at diagnosis of spondyloschisis, which can show the same lay of spondyloschisis from vertebral and small vertebral arthrosis clearly, and help to differentiate diagnoses.

对椎弓峡部裂CT扫描是一个可靠的手段，反角度扫描可以将椎弓峡部裂与椎间小关节同时清晰地展示于一个层面，有利于对该病的诊断及鉴别诊断。

So far, only a few reports can be seen which indicate cervical biomechanical change caused by ADR, and no experiment and clinical study have been undertaken on the affects versus ACF on inferior segment zygapophyseal joints.

第一章 成人下颈椎椎体与关节突关节倾角X线测量及其意义目的：测量成人下颈椎(C_3～C_7)关节突关节的倾角，为影像学提供参考数据，探讨年龄因素对倾角的影响。

Department of orthopaedics, Xiangya Hospital, Central-south University, Changsha, China3 Objectives: To study cervical adjacent zygapophyseal joint stress distribution following two level ADR and ACDF on, in order to provide biomechanical reference for clinical application of two level ADR. Methods: Eleven healthy adult fresh-frozen multi-segmental cervical spine segments were utilized in this study and biomechanically evaluated under the following C4/5, C5/6 cervical disc conditions:⑴intact spine;⑵he Bryan Disc prosthesis implantation;⑶the intervertebral fusion.

取11具新鲜完整的成人下颈段标本，按实验先后分别制成C4/5、C5/6椎间盘完整、椎间盘置换、椎间融合三个模型组，在标本上施加轴向分级载荷，将微型阻电式压力传感器置入C5/6、C6/7关节突关节内，测量合组各分级载荷下C5/6、C6/7关节突关节内的压力。

Vertebral column were excided through dorsal meso-incision. the removed vertebral column were put on ice as soon as possible and L1/2, L2/3, L3/4, L4/5, L5/6 intervertebral disc tissue were procured.

取下整个腰椎段脊柱迅速放在冰面上，用眼科剪刀、镊剥离椎间小关节和椎体前方的软组织，分别从L1椎体下缘和L2椎体上缘分离上、下软骨终板，取出L1/2椎间盘组织。

In case of a total en bloc resection of one or more high thoracic vertebrae, we start with a dorsal approach by exposing the affected spinal segments, cut and remove rib ends bilaterally, perform one or multilevel laminectomies and bilateral foraminectomies and facetectomies, followed by an incision and reaming of the intervertebral discs at the appropriate levels.

假设要做一个或多个高位胸椎椎体的整块切除，我们采用背侧入路显露病变节段，切除双侧肋骨末端，行一节或多节段椎板切除，双侧椎间孔及小关节切除，继以相应节段椎间盘切除和刮除。

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％。