生物力学

Methods:Ten adult mixed breed dogs(no significant individual difference)were made transverse fracture at bilateral iliopectineal crest 1.5 cm above the dome of acetabulum,which were fixed with ATMFS and steel plate respectively.The X-ray,macropathological observation and biomechanical test were analyzed at 1,2,4,8,12 weeks after operation.

选用10只成年杂种家犬，建立双侧髋臼臼顶上方1.5cm处的横形骨折动物模型，分别采用ATMFS前柱固定器和6孔重建钢板内固定，于术后1、2、4、8、12周各取2只动物，行X线检查、大体观察和生物力学测试。

Methods:Animal models of 25 adult mixed breed dogs were established by transverse osteotomy at bilateral iliopectineal crest,which were fixed with ATMFS anterior column connector and steel plate respectively. The animals were examined at 2,4,6,8,and 12 weeks by X-ray,macropathological observation and biomechanical test. Tetracin fluorescent labeling,HE staining,Masson triad colour staining,in situ hybridization and immunohistochemical method were performed and histological image analysis were applied.

建立犬双侧骨盆弓状线骨折的动物模型，分别采用ATMFS前柱固定器和5孔重建钢板内固定，于术后2、4、6、8、12周分别行影像学检查、大体观察及生物力学测试；采用四环素荧光标记法、HE染色、Masson三色染色法、原位杂交法、免疫组织化学法进行组织学观察并图像分析；采用RT-PCR法检测骨折端不同时期骨钙蛋白和核心转录因子mRNA相对表达量的变化。

BACKGROUND: Iliosacral screw fixing the sacroiliac joint after reduction can provide the stability of the pelvis.

背景：骶髂螺钉直接固定复位后的骶髂关节，可提供足够的骨盆稳定性，其生物力学稳定性优于其他常用的内固定。

The FCL graft passes along its native course between these 2 attachment sites, medial to both the superficial layer of the iliotibial band and the lateral aponeurosis of the long head of the biceps femoris.35 We chose to study an anatomic FCL reconstruction because previous studies have reported that anatomic ligament reconstructions more closely approximate normal knee biomechanics.

FCL移植物通过两个附着点自然连接，向内到达髂胫束表层和股二头肌长头外侧腱膜[35]。我们选择研究FCL解剖学重建是因为过去研究已经报道了解剖学韧带重建更接近正常膝关节生物力学机制[5，6，11，12，19]。

Objective To evaluate the biomechanism on Z-plate fixation system with an interbody graft .

目的对椎体间植骨加Z_plate内固定进行生物力学评价。

To compare biomechanics in posterolateral fusion and posterior lumbar interbody fusion,and explore the ideal reconstruction method for each lumbar instability

对侧后方融合与经后路椎体间融合进行生物力学比较，探讨腰椎重建术式的选择方法。

Objective A biomechanical comparison of three kinds of internal fixation for intercondylar fracture of humerus was, made so as to provide a theoretical basis for clinical practice.

目的 对肱骨远端髁间骨折3种内固定方法进行生物力学比较，为临床治疗提供理论依据。

Methods A wet hip joint's sample from corpse was scaned by CT and all images of every cross-section hip joint's layer was obtained, and an hip joint's model was contructed with Unigraphics NX 2.0 and Solid Works 2006 SP 0.0 software. The models were assembled when simulated total hip arthroplasty after total hip joint prosthetic and ischiofemoral ligament model had been constructured. Analysis was done on von Mises stress distribution and amount of total hip component when simulated seated leg-crossing manuver. The bone and metal components were meshed as rigid bodies, composed of three-dimensional, all-quadrilateral rigid body elements, and hip joint capsule ligament was fully three-dimensional, hexahedral continuum elements representations. Results The current form of this ischiofemoral ligament's reconstruction finite element model provided for multi-body contact, large displacement interfacial sliding, large deformation capsule ligament representation, and clearly reflected the real ischiofemoral ligansent's anatomy and biomechanical behavior. The maximum on Mises stresses at the joint interface was more than that fur an otherwise identical hardware-only construct.

选择成人尸体髋关节行CT成像得到髋关节每层横截面图像，提取边界坐标，利用有限元分析软件Unigraphics NX 2.0和Solid-Works 2006 SP0.0构建出髋关节三维有限元模型及人工髋关节假体，并模拟全髋置换术进行装配，将坐股韧带按其术中重建位置进行构建骨骼与金属模型采用三维十节点四面体实体单元进行网格划分，关节囊六面体连接单元划分，模拟坐位腿交叉动作载荷获取假体撞击过程的角活动度和相应的von Mises应力分布情况结果所构建的多体连接、大界面划移、大变形的坐股韧带重建有限元模型，客观反映坐股韧带真实解剖形态及生物力学行为，增加坐股韧带重建的模型其关节面的最大主应力值大于仅有金属的模型。

Objective To conduct biomechanical study and three dimensional finite element analysis on lumbar spondylolysis and spondylolisthesis treated with single vertebra reduction and fixation system, and to evaluate the long term outcome of isthmic spondylolisthesis treated with direct repair and fixation with LSRF.

腰椎峡部崩裂及滑脱是常见的脊柱疾患，生物力学因素在其发病机制和治疗方法的选择上具有重要作用。其手术的目的是恢复腰椎解剖结构，稳定脊柱。

Group B, based on the group A, single-door laminoplasty with reconstruction of posterior cervical ligamentous complex was performed.

目的：比较重建颈后方韧带复合体单、双开门椎板成形术后生物力学的差异。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。