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distraction
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  “distraction”译为未确定词的双语例句
    Distraction lengthening was applied 7 to 10 days after the initial corticotomy at the average rate of 0.25 ?
    术后 7~ 10d开始行骨延长 ,每次延长 0 .2 5mm ,每天 4次。
短句来源
    . Pathological and X ray observation were carried out at 1, 2 ,3 ,6 and 12 weeks respectively after injury for comparison between two groups. Results The X ray measurement showed that the length of callus distraction in the bone lengthening group increased by (2.82±0.94)cm and the relative lengthening of bone is 19.3% (15.8%-21.4% ), compared with normal femur on the same X ray film.
    结果骨延长组动物8周内骨延长长度为(2.82±0.94)cm,平均为伤前股骨全长的19.3%(15.8%~21.4%)。
短句来源
    The second group showed intermediate changes and the distraction gap increased its bone mineral content at a rate of 0.1 to 0.3% per day.
    一般组每日BMC增加 0 .1%~ 0 .3% ,新骨中速生长 ;
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  相似匹配句对
    Distraction lengthening was applied 7 to 10 days after the initial corticotomy at the average rate of 0.25 ?
    术后 7~ 10d开始行骨延长 ,每次延长 0 .2 5mm ,每天 4次。
短句来源
    Evaluation the value of radionuclide bone imaging in the use of rh-BMP/bFGF to accelerate bone formation during mandibular distraction osteogenesis in goat
    核素骨显像在局部应用rh-BMP/bFGF加速山羊下颌骨牵张成骨实验研究中的应用价值
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  distraction
The PT was shown to correlate with the children's motor activity (0.52), approaching a new subject (0.39), distraction (-0.34), and the age of entering a nursery (-0.35).
      
We present three case reports demonstrating the use of distraction lengthening for symptomatic congenital short metatarsals.
      
In all three cases the distraction lengthening of the fourth metatarsal was performed with an external fixateur system aided by an intramedullary K-wire without any supplemental bone graft.
      
The arthrolysis can be performed using arthroscopy, the open technique or distraction arthroplasty.
      
Potential and Limitations of Cephalometric Analysis of Maxillofacial Bone Movement in the Case of LeFort III-Distraction
      
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Objective To investigate biomechanical background of various violence induced thoracolumbar injuries. Methods A mechanical model of human thoracolumbar motion segment was developed using three dimensional finite element method. Its responses to vertical compression, compression flexion, distraction flexion were examined. Results When vertical compressive force was applied, the central part of upper and lower end plates of thoracic spine and the central part of the cancellus bone abjacent to...

Objective To investigate biomechanical background of various violence induced thoracolumbar injuries. Methods A mechanical model of human thoracolumbar motion segment was developed using three dimensional finite element method. Its responses to vertical compression, compression flexion, distraction flexion were examined. Results When vertical compressive force was applied, the central part of upper and lower end plates of thoracic spine and the central part of the cancellus bone abjacent to the end plate were loaded with the most intensive stresses, at the same time, the posterior lateral part of annulus fibrosus, the anterior and posterior part of thoracolumber body, the pedicle and the isthmus parts of cortical bone and the fact joints were also concentrated with stresses; when compressive flexion force was applied, the anterior part of end plate and the anterior lower part of vertebral body were loaded with the most intensive stresses, when distractive flexion force was applied, the posterior structures of vertebral body, including the upper wedge of spinous, posterior longitudinal ligament, suppraspinous ligament, interspinous ligament, the posterior part of annulus fibrosus were concentrated with stresses. Conclusion Biomechanical factor played an important role in mechanism of thoracolumbar vertebral injuries. There are intimate relation between type of injury with pattern of violences.

目的探讨不同类型胸腰椎损伤的生物力学背景,为临床正确的诊断及治疗提供理论基础与科学依据。方法用三维有限元方法建立人体胸腰椎活动节段的力学模型,并对其在垂直压缩、压缩屈曲、分离屈曲三种外加载荷下的应力进行分析。结果垂直压缩载荷下,胸椎上、下终板的中央及松质骨邻近终板的中央部位应力值最高,同时椎间盘纤维环的后外侧、胸腰椎体的前后部、密质骨的椎弓根、峡部及小关节也存在应力集中区;压缩屈曲载荷下,终板前方及椎体前下方应力集中;分离屈曲载荷下,椎体后部结构的棘突上缘、后纵韧带、棘上、棘间韧带、椎间盘纤维环后部均是应力集中的部位。结论生物力学因素在胸腰椎脊柱损伤的发生机制中占有重要地位,其损伤类型与所受外载荷力的方式有密切关系

Objective: To establish a new technique for three dimensional surface reconstruction of teeth (dental surface reconstruction), and apply it to investigate impacted teeth in bone before operation. Methods: On the basis of three dimensional surface reconstruction of teeth and jaws, the dental surface reconstruction is obtained with the technique of shaded surface display (SSD), making transparent bone around. This technique is applied to investigate 9 cases of supernumerary and impacted teeth. Results: Dental...

Objective: To establish a new technique for three dimensional surface reconstruction of teeth (dental surface reconstruction), and apply it to investigate impacted teeth in bone before operation. Methods: On the basis of three dimensional surface reconstruction of teeth and jaws, the dental surface reconstruction is obtained with the technique of shaded surface display (SSD), making transparent bone around. This technique is applied to investigate 9 cases of supernumerary and impacted teeth. Results: Dental surface reconstruction image can present the dental surface image including crown, root, neck and root bifurcation in three dimensional way, without presenting the image of other tissue around. In 4 cases, the abnormal configuration, labial or palatal location, and relation with dentition in anterior maxilla of 5 supernumerary were shown. In 1 case, the shape, location, eruption orientation and the angle of orthodontic distraction of 1 impacted permanent canine were displayed. In 3 cases, the shape, location, and extraction resistance of 6 impacted wisdom teeth were revealed. In 1 case, the configuration, distance to adjacent molar of 1 impacted wisdom tooth, which is a transposition tooth in maxillary sinus, were also demonstrated. Conclusion: The dental surface reconstruction is a new technique to display three dimensional surface configuration of teeth. This technique can be applied to examine impacted and supernumerary teeth before surgical and orthodontic treatment.\;

目的 :建立牙齿立体表面形态图像并探讨用于术前检查骨内埋伏牙的效果。方法 :应用三维螺旋CT的图像处理功能 ,在牙颌骨表面重建图像的基础上 ,采用图像处理表面遮盖法 ,消除周围骨组织的影像 ,获得单纯牙体表面图像。应用该方法检查 9例患者的骨内埋伏多生牙和阻生牙。结果 :能清楚显示上颌骨埋伏多生牙的畸形形态、在牙列唇侧或腭侧的位置及与牙列牙根的关系 ;上颌埋伏恒尖牙萌出方向及与正畸牵引方向的角度 ;阻生智齿与第二磨牙的距离并据此预测拔除阻生齿时可能形成的阻力方位。结论 :牙体表面成像是一种能展示牙齿立体表面形态影像的新技术 ,可作为骨内埋伏牙外科处理和正畸治疗前的检查手段。

Objective To investigate the pathological changes of bone in situ lengthening for the gunshot bone defect, and to discuss the practical feasibility and biological basis of bone lengthening in the conditions of periosteum damage. Methods The 38 canines were randomly distributed into two groups and sustained the same gunshot bone defect in the mid femoral diaphysis. In one group, the femur were stabilized with Bastiani external fixator and 2 weeks later the fractured limb with fixation were lengthened 2-4...

Objective To investigate the pathological changes of bone in situ lengthening for the gunshot bone defect, and to discuss the practical feasibility and biological basis of bone lengthening in the conditions of periosteum damage. Methods The 38 canines were randomly distributed into two groups and sustained the same gunshot bone defect in the mid femoral diaphysis. In one group, the femur were stabilized with Bastiani external fixator and 2 weeks later the fractured limb with fixation were lengthened 2-4 times per day at a speed of 0.5-1 mm/d until the normal length was reached. The control group only had external fixation without lengthening. 3, 6 and 12 weeks after injury, the canines were given 99mTc MDP and got radionuclide examination under SPECT (ADAC company, USA.). Pathological and X ray observation were carried out at 1, 2 ,3 ,6 and 12 weeks respectively after injury for comparison between two groups. Results The X ray measurement showed that the length of callus distraction in the bone lengthening group increased by (2.82±0.94)cm and the relative lengthening of bone is 19.3% (15.8%-21.4% ), compared with normal femur on the same X ray film. The count of radionuclide increased gradually at the region of bone defect in the lengthening group. While in the fracture ends, no significant difference was found in the development pattern through each radionuclide observation phase between two groups. The main mode of osteogenesis was endochondral ossification and the bone defect area was enriched by chondrocyte in the bone lengthening group. Conclusion There are no obvious negative influence on bone turnover and local blood flow in the bone lengthening for gunshot bone defect. The remained periosteum and bone fragment under gunshot injury may have important role in the progression of osteogenesis. The neogenetic capillary provided not only blood supply for healing of bone but also source of osteocyte for bone lengthening in the case of the periosteum and blood circulation damaged with gunshot wound.

目的观察对火器伤造成的骨缺损行一期原位骨延长术治疗的病理学和影像学变化,分析在骨膜损伤条件下行骨延长术治疗骨缺损的可行性及其生物学基础。方法成年犬38只,随机分成两组,制造犬股骨火器伤骨缺损模型,对两组动物分别采用外固定器行一期原位骨延长术和单纯骨折固定术治疗,治疗全程行X线检查、病理学检查和放射性核素骨显像分析。结果骨延长组动物8周内骨延长长度为(2.82±0.94)cm,平均为伤前股骨全长的19.3%(15.8%~21.4%)。骨延长组动物骨缺损区的延迟相放射性计数逐渐增加。两组动物骨折端的延迟相和血池相变化趋势一致,其放射性计数无统计学差异。骨延长主要的成骨方式是软骨化骨。残存骨碎片可能具有成骨能力。结论残存骨膜和骨碎片在骨延长的成骨过程中有明显作用。但在骨膜损伤的条件下,骨延长技术仍可用于其骨缺损的治疗,骨折端周围组织新生血管不仅为骨愈合提供了血供,而且为其提供了骨细胞的来源。操作正确的骨延长术对骨折端血供和骨代谢无明显的不良影响。

 
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