腰椎

Optimal screw path length: The distance from the optimal entrancepoint to the optimal vent point Screw tail distance: The distance between left and right optimalentrance point Transverse section angle: Half of the included angle between left andright optimal screw Sagital section angle: The average of angle between both side optimalscrew with the upper terminal plate 1.2.2 Modify the threshold of CT value to distinguish the rear partof the lumbar, Observate the the optimal entrance point and the adjustable range.

1.2.2三维重建观察螺钉最佳进钉点的位置和各方向螺钉进钉点关系，调整CT值下限阈值使椎弓后部结构尽量显示清晰，以利观察。 1.3统计方法本实验采用SPSS13.0统计软件。对同一椎体左右两侧椎弓根螺钉相对数据行计量资料配对样本t检验，对男女组间相关数据行计量资料独立样本t检验，对男女组内不同腰椎节段间相关数据行单向方差分析及不同腰椎节段间LSD法多重比较。

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。

The lumbar vertebra anatomy characteristic is every two neighboring lumbar vertebrae,and behind two joints constitutes after the intervertebral disc,its acies articularis nearly in sagittal plane,when waist anteflexion this activity is big,easy to create this joint damage.

腰椎的解剖学特点是每两个相邻的腰椎，由椎间盘和后面两个关节构成，其关节面近于矢状面，在腰部前屈时该活动度较大，容易造成该关节损伤。

In comparison with traditional rigid fixation, the lumbar "U" shape dynamic fixation system may be a better fixation instrument for the lumbar degenerative disease, which can decrease intervertebral disc stress and prevent intervertebral disc cataplasia of the adjacent segment.

腰椎"U"形弹性内固定与刚性内固定相比，术后能明显降低邻近节段椎间盘内应力，有利于减少和预防邻近节段退变，有望成为进行腰椎内固定较好的一种装置。本文由中国论文范文收集整理。

Methods: eighty two lumbar lateral films were reviewed, 50 of which with the diagnosis of spondylolisthesis and 32 of which as controls. the spinous process step sign at every l3 4 and l4 5 segments was scored.

对82例腰椎滑脱患者的腰椎侧位片进行分析，其中50例为腰椎滑脱组，32例作为对照组，对每一张侧位片中l3 4和l4 5棘突间的阶梯征进行评价并记分。

Instability of lumbar spine is the subluxation of lumbar vertebrae when external force is present. It is the main cause of low back pain and sciatica.

「腰椎不稳定」目前被认为是当腰椎被施以外力时所产生的位移大於正常腰椎的一种现象，且是下背痛及坐骨神经痛的主要原因之一。

OBJECTIVE: To evaluate the therapeutic effect of Wallis interspinous dynamic stabilization on lumbar degenerative disease compared with lumbar spinal canal decompression.

目的：与单纯腰椎管减压相比，评价腰椎管减压并棘突间稳定系统Wallis置入固定治疗腰椎退变性疾病的效果。

Methods. A validated 3-dimensional, nonlinear finite element model of an intact adult human L3-L4 motion segment was developed. Four fusion types were simulated using this model, including anterior lumbar interbody fusion, posterior lumbar interbody fusion, intertransverse process fusion, and interspinous process fusion.

制作一个完整的成人腰3-4节段三维立体多元化模型，再用这个模型来制成4种融合方式的模型，包括腰椎前路椎间融合、腰椎后路椎间融合、腰椎横突间植骨融合、椎板棘突间植骨融合；而且达到融合的程度也不尽相同。

Methods verificate the feasibility and outcome of surgical treatment isthmic spondylolisthesis with laminoplasty by analysis the surgical data of 16 isthmic spondylolisthesis patients.

通过对16例接受椎板棘突复合体回植方案治疗腰椎峡部裂型腰椎滑脱症患者手术治疗资料的分析，验证椎板棘突复合体回植术在峡部裂型腰椎滑脱手术治疗中的可行性以及临床应用疗效。

RESULTS: Following three approaches of lumbar interbody fusion, the stability of lumbar spine was significantly reduced, which was enhanced after bilateral pedicle screw fixation (torsion indexes were also increased). In addition, rigidity of the lumbar spine was enhanced.

结果：行3种单纯椎间融合后，腰椎的稳定性能明显下降，附加了双侧椎弓根螺钉固定后，腰椎的各项稳定性指标均增强，包括扭转力学指标也得到了很大增强，有效增加了腰椎的刚度。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。