本文關鍵詞： 腰椎 骨質(zhì)疏松 生物力學 組織工程 骨科植入物 脊柱植入物 腰椎退變 骨水泥 椎弓根螺釘 軸向拔出力 旋出力矩 穩(wěn)定性　出處：《中國組織工程研究》2016年31期 　論文類型：期刊論文

【摘要】：背景:老年性骨質(zhì)疏松患者由于機體骨質(zhì)的脆弱,容易造成椎弓根螺釘固定能力得到進一步削弱。因此骨質(zhì)疏松性腰椎退變患者采用椎弓根螺釘修復時骨水泥滲漏以及螺釘取出量等問題難以解決。目的:探討新型可灌注骨水泥椎弓根螺釘?shù)纳锪W性能及在骨質(zhì)疏松性腰椎退變患者中的應用效果。方法:選取完整浸潤腰椎標本(T11-L5)6具,平均年齡(72.9±4.2)歲,共42個椎體,平均骨密度為0.696 g/cm2。所有椎體任意選取一側椎弓根置入可灌注骨水泥椎弓根螺釘,采用水泥推桿和灌注筒在X射線透視下灌注2 mL骨水泥;在椎體標本對側置入相同數(shù)目常規(guī)螺釘。對2種螺釘進行三點彎曲實驗,對選取椎體進行最大軸向拔出力實驗及最大旋出力矩實驗,觀察椎體的破壞情況及螺釘置入效果。結果與結論:(1)新型可灌注骨水泥椎弓根螺釘極限強度、屈服載荷均顯著大于常規(guī)螺釘(P0.05);極限位移和屈服位移均顯著小于常規(guī)螺釘(P0.05);(2)新型可灌注骨水泥椎弓根螺釘?shù)妮S向拔出力及最大旋出力矩均顯著高于常規(guī)螺釘(P0.05);(3)綜上所述,新型可灌注骨水泥椎弓根螺釘操作簡單,能夠有效的控制骨水泥滲透,提高螺釘在骨質(zhì)疏松椎體內(nèi)的穩(wěn)定性,且治療后螺釘取出相對方便,不會對椎體和釘?shù)喇a(chǎn)生明顯的破壞,促進機體早期恢復。
[Abstract]:Background: elderly patients with osteoporosis due to the fragile body bone. It is easy to reduce the fixation ability of pedicle screw further. Therefore, it is difficult to solve the problems of cement leakage and the amount of screw removal in patients with osteoporotic lumbar degenerative lumbar vertebrae using pedicle screw repair. To investigate the biomechanical properties of a new type of perfusible cement pedicle screw and its application in patients with osteoporosis lumbar degenerative. Methods: the intact infiltrated lumbar vertebrae specimens were selected. T11-L5: 6. The mean age was 72.9 鹵4.2 years old, 42 vertebrae, the average bone density was 0.696 g / cm ~ (-2). 2 mL bone cement was infused with cement push rod and pouring tube under X-ray fluoroscopy. The same number of conventional screws were placed on the opposite side of the vertebrae specimens. Three point bending tests were carried out on the two kinds of screws, and the maximum axial pull-out force and the maximum spin-out moment were tested on the selected vertebrae. Results and conclusion the ultimate strength and yield load of the new type of perfusible cement pedicle screws were significantly higher than that of the conventional screws (P 0.05). The ultimate displacement and yield displacement are significantly lower than the conventional screw P0.05; (2) the axial pull-out force and the maximum spin-out moment of the new rechargeable cement pedicle screws were significantly higher than those of the conventional screws (P 0.05). In conclusion, the new type of cement pedicle screw is easy to operate, can effectively control the osseous penetration, improve the stability of the screw in the osteoporotic vertebral body, and the screw removal is relatively convenient after treatment. There is no obvious damage to the vertebral body and the nail canal, and promote the early recovery of the body.
【作者單位】： 三峽大學第一臨床醫(yī)學院宜昌市中心人民醫(yī)院脊柱外科三峽大學脊柱醫(yī)學與創(chuàng)傷研究所;
【分類號】：R687.3;R580
【正文快照】： 文章快速閱讀:新型可灌注骨水泥椎弓根螺釘修復骨質(zhì)疏松性腰椎退變的生物力學特性目的:方法:觀察指標:觀察新型可灌注骨水泥椎選取完整浸潤腰椎標本(T11-L5)6具,對2種螺釘進行三點彎曲弓根螺釘在骨質(zhì)疏松性退平均年齡(72.9±4.2)歲,所有椎體一側實驗,對選取椎體進行最變腰椎中，

本文編號：1485386