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distraction forces
相关语句
  牵张力
     Effects of Distraction Forces and rhBMP-4 on the Cellular Proliferation and Differentiation in Cranial Sagittal Suture of Rats
     牵张力及rhBMP-4对大鼠颅骨矢状缝内细胞增殖分化的影响
短句来源
     Three-dimensional finite element analysis of stress distribution in temporomandibular joint under distraction forces
     牵张力作用下颞下颌关节受力的三维有限元研究
短句来源
     The changes of cranial suture induced by the distraction forces in growing goats
     生长期山羊颅骨缝受牵张力作用后超微结构与免疫组化观察
短句来源
     Objective: The purpose of this study is to establish a periosteal distraction model on rabbit mandiblar ramus, to observe the formation of newly formed bone and its structure in each phase after distraction of periostea, to observe the changes of periostea after being secondary to distraction forces, to investigate the possibility of osteogenesis by periosteal distraction in oral and maxillofacial region, and to study the possibility of a new restoration method of clincal alveolar and other bony defect.
     目的:本研究在兔下颌升支建立骨膜牵张成骨模型,观察牵张骨膜后,在骨膜下新骨的形成,以及新骨在各个阶段的结构,同时观察了骨膜受到牵张力后的改变,研究骨膜牵张在口腔颌面部成骨的可能,为牙槽骨缺损及其他口腔颌面部骨组织缺损探讨新的重建方法。
短句来源
     Results Stress distribution of TMJ was different when distraction forces were in different directions.
     结果不同方向牵张力作用下颞下颌关节的受力情况是不同的。
短句来源
  “distraction forces”译为未确定词的双语例句
     Methods The three-dimensional finite element model of the temporomandibular joint and the mandible was established , and the distraction forces were simulated on the model.
     方法通过建立颞下颌关节及下颌骨的三维有限元模型,在模型上模拟牵张力的作用,得到下颌骨牵张成骨过程中,颞下颌关节的受力状况。
短句来源
     The effects of axial distraction forces on the distal epiphyseal plate of the right femur were studied in 32New Zealand youns white rabbits. A controlled distractional force of ON, SN and 10N every 3 days was applied through an external fixator composed of 2 strain gauges.
     采用新西兰幼兔32只,在右股骨下端骨骺安装外固定架和拉压传感器,对骨骺板近端分别施加张力0N、5N、10N,并定期进行张力调节。
短句来源
     Distraction forces of 5N and 10N were applied every 3 days to the distal growth plate of the right femur in vivo, in 16 rabbits Four weeks later the length of all distracted femurs was significant longer than both the length of control side and the same one of group ON.
     16只兔右股骨经5~10N力每3天一次牵张. 4周后的股骨长度值明显大于左侧和0N组.
短句来源
     After 24 h mechanical distraction with physiological magnitude, F-actin of osteoblasts was organized and paralleled to the direction of distraction forces.
     生理性机械牵引力作用于成骨细胞24h后,肌动蛋白细胞骨架蛋白组装,沿受力方向排列;
短句来源
  相似匹配句对
     The changes of cranial suture induced by the distraction forces in growing goats
     生长期山羊颅骨缝受牵张力作用后超微结构与免疫组化观察
短句来源
     Forces of Nature
     大自然的威力
短句来源
     Results Stress distribution of TMJ was different when distraction forces were in different directions.
     结果不同方向牵张力作用下颞下颌关节的受力情况是不同的。
短句来源
     On the Comprehensive Forces of the Library
     综合馆力论
短句来源
     Intraoral distraction osteogenesis
     口内入路的颌骨牵引成骨技术
短句来源
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  distraction forces
Posterior distraction forces of the posterior longitudinal ligament stratified according to vertebral level
      
The surgery consisted of total spondylectomy of the deformed vertebra and simultaneous application of compression-distraction forces to this area.
      
These injuries arise in motor vehicle accidents because of flexion-distraction forces, or flexion of an already rotated head.
      
However, the indirect injury which results from shearing and distraction forces, is more subtle.
      
First, pure uniaxial distraction forces along the axis of the inserted screws were applied to remove the screws.
      
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The effects of axial distraction forces on the distal epiphyseal plate of the right femur were studied in 32New Zealand youns white rabbits. A controlled distractional force of ON, SN and 10N every 3 days was applied through an external fixator composed of 2 strain gauges.The cntralateral side (left) was kept as a control. After 4weeks , the length of all distracted femurs was significantly longer than that of the contralateral side and that of the group ON. Radiographs of hind limbs showed widening...

The effects of axial distraction forces on the distal epiphyseal plate of the right femur were studied in 32New Zealand youns white rabbits. A controlled distractional force of ON, SN and 10N every 3 days was applied through an external fixator composed of 2 strain gauges.The cntralateral side (left) was kept as a control. After 4weeks , the length of all distracted femurs was significantly longer than that of the contralateral side and that of the group ON. Radiographs of hind limbs showed widening of the distal epiphyseal line and metaphysis of right femurs.Histological studies revealed no evidence of epiphyseal se paration. These results showed that limb lengthening by epiphyseal distration without a preliminary fracturing was attributable to applied force. The risk of premature closure of epiphyseal line, which is believed the worst complication in epiphyseal distraction, could be avoided and/or lessened.

采用新西兰幼兔32只,在右股骨下端骨骺安装外固定架和拉压传感器,对骨骺板近端分别施加张力0N、5N、10N,并定期进行张力调节。4周后5N、10N张力组的右股骨长度值明显高于左侧股骨,也明显高于同侧对照组。X线片显示右股骨下端骨骺板与干骺端间隙增宽,组织学镜检无一例出现骨骺分离骨折。研究结果表明适量的张力能刺激骨骺产生无骺分离状态下的骨延长,从而避免或减少骨骺牵张术中最严重的并发症──骨骺早期封闭。

The effectiveness of epiphyseal distraction was investigated in vivo and in vitro by forces applied to the distal femoral growth plates of New Zealand white immature rabbits. Distraction forces of 5N and 10N were applied every 3 days to the distal growth plate of the right femur in vivo, in 16 rabbits Four weeks later the length of all distracted femurs was significant longer than both the length of control side and the same one of group ON. Histological study showed hyperplasia of the growth...

The effectiveness of epiphyseal distraction was investigated in vivo and in vitro by forces applied to the distal femoral growth plates of New Zealand white immature rabbits. Distraction forces of 5N and 10N were applied every 3 days to the distal growth plate of the right femur in vivo, in 16 rabbits Four weeks later the length of all distracted femurs was significant longer than both the length of control side and the same one of group ON. Histological study showed hyperplasia of the growth plate, an increase in chondrocytes division rate, and no evidence of epiphyseolysis. The in vitro breaking forces of the growth plate were measured after in vivo distraction. The mean breaking force of the distracted side was not lower than mean values for the undistracted control side. Sixteen femora from 8 rabbits underwent epiphseal distraction in vitro, with 20N, 60N and 100N forces. the mean plastic deformation of the growth plate was great in connection with increasing traction. The subsequence breaking force of these growth plates was no influenced. The results obtained in this study indicated that limb lengthening might be achieved by chondrodiatasis with the proper distraction force and/or a slow distraction rate.

本研究是对新西兰幼兔股骨远端骨骺进行体内和体外牵张实验.16只兔右股骨经5~10N力每3天一次牵张.4周后的股骨长度值明显大于左侧和0N组.形态学变化是受牵张的骺板增厚,软骨细胞增殖且无骨骺分离骨折.体外骺板抗断裂测试显示夸张后的骺板强度不低于未经牵张的对照侧.8只动物16根股骨于体外接受20~100N力的牵张,其骺板的塑性变形度随牵张力值的增高而增大,抗断裂强度亦不低于未经牵张的骨骺.这些结果表明适量的牵张力和/或低牵张速率是实现“软骨分离”或骨延长的关键.

Since advent of three-column theory, brust fracture of the spinal column has long been recognized as the most common fracture of the thoracolumbar spine. Due to canal compromise by the retropulsed bony fragment, neuralgic defect was prevailed in this type of spinal injury. In the literature recently, new information being presented on the classification, concepts of stability and instability, need for surgery, and selection of the most appropriate surgical implant. Distraction force with kyphosis correction...

Since advent of three-column theory, brust fracture of the spinal column has long been recognized as the most common fracture of the thoracolumbar spine. Due to canal compromise by the retropulsed bony fragment, neuralgic defect was prevailed in this type of spinal injury. In the literature recently, new information being presented on the classification, concepts of stability and instability, need for surgery, and selection of the most appropriate surgical implant. Distraction force with kyphosis correction has been thought the most effective way in reducing the retropulsed fragment, either during the operation by variable implants or by traction device preoperatively, such as traction bow device. A number of biomechanical studies has been done on the isolated lumber spine under axial loads to determine the load distribution. Little study was performed on the whole spine under traction to determine the relative distribution of strain. The purpose of this study is to use the whole spine of goat under the axial load in INSTRON machine and Traction Bow to investigate the biomechanical properties such as train distribution, deformation of disc, and load- to-failure. Next, we try to reproduce a burst fracture model for further study in traction -reduction experiment. From the strain distribution diagram, the junction of thoracolumber spine bears the larger strain. The strain in the thoracic region is mediate, in contrast, the strain in lower lumbar is smaller in our experiment. The mean deformation of disc is 2.86mm, 5.09mm,6.45mm at the loading of 10kg, 20kg, 30kg reapective. The mean maximum loading of goat spine is 91.40kg in the load-to -failure test. In this study, strain distributions of spinal column observed by INSTRON machine and Traction bow are similar. However, the strain values from traction Bow is smaller. In conclusion, the junction of thoracolumbar spine is more effective in traction from its larger strain distribution. Hence, using the appropriate traction force in intact cervical vertebrae will have a better reduction effect to burst fracture of thoracolumbar vertebrae. The load -deformation disgram, total deformation, and maximum loading in this study will be helpful for related researches in the future.

胸腰椎的破裂骨折是一种党见的脊椎伤害,由于神经管常受到破裂骨块的压迫,常造成神经症状。牵引的力量加上后弯的矫正是目前被公认为手术或非手术方法治疗破裂骨折的重要原则。牵引的力量无论是在手术中应用内固定器或是在手术前应用脊椎牵引器就是希望藉着骨折复位进一步达到减压的可能性。过去的实验研究报告大多针对较少节数的腰椎施以轴向负载的生物刀学分析。很少实验对整条脊椎施以轴向负载并加以作生物刀学的量化分析。本实验的目的就是在以INSTRON材料试验机及脊椎牵引器探讨整条羊脊椎在外力牵引下的生物力学特性如应变分布、椎间盘变形量以及破坏负载。并试行制造破裂骨折以便进一步观察脊椎在牵引下的生物刀学特性实验结果我们由整条羊脊椎的应变分布图得知,在胸腰椎接合之区域有较大的应变值表示该区域局部所承受的力量较大,胸椎区域之应变值次之。而下腰椎区域之应变值则较小椎间盘总变形量在10kg时平均值为286mm,在20kg时为5.09mm,在30kg时为645mm。且羊脊椎在拉刀破坏试验时,平均最大负载为91.40kg。而在脊椎牵引器实验所得之应变分布与材料试验机实验所得之分布情形相近,但数值有较小之现象。由结果我们得到在实验上脊柱承受牵引时,...

胸腰椎的破裂骨折是一种党见的脊椎伤害,由于神经管常受到破裂骨块的压迫,常造成神经症状。牵引的力量加上后弯的矫正是目前被公认为手术或非手术方法治疗破裂骨折的重要原则。牵引的力量无论是在手术中应用内固定器或是在手术前应用脊椎牵引器就是希望藉着骨折复位进一步达到减压的可能性。过去的实验研究报告大多针对较少节数的腰椎施以轴向负载的生物刀学分析。很少实验对整条脊椎施以轴向负载并加以作生物刀学的量化分析。本实验的目的就是在以INSTRON材料试验机及脊椎牵引器探讨整条羊脊椎在外力牵引下的生物力学特性如应变分布、椎间盘变形量以及破坏负载。并试行制造破裂骨折以便进一步观察脊椎在牵引下的生物刀学特性实验结果我们由整条羊脊椎的应变分布图得知,在胸腰椎接合之区域有较大的应变值表示该区域局部所承受的力量较大,胸椎区域之应变值次之。而下腰椎区域之应变值则较小椎间盘总变形量在10kg时平均值为286mm,在20kg时为5.09mm,在30kg时为645mm。且羊脊椎在拉刀破坏试验时,平均最大负载为91.40kg。而在脊椎牵引器实验所得之应变分布与材料试验机实验所得之分布情形相近,但数值有较小之现象。由结果我们得到在实验上脊柱承受牵引时,在胸腰椎接合之区域会承受较大的拉力,因

 
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