INVITRO STUDIES OF FRETTING CORROSION OF ORTHOPEDIC MATERIALS
INVITRO STUDIES OF FRETTING CORROSION OF ORTHOPEDIC MATERIALS
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DOI：
10.1002/jor.1100060415
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发表时间：
1988-07-01
影响因子：
2.8
通讯作者：
MERRITT, K
中科院分区：
文献类型：
--
作者：
BROWN, SA;HUGHES, PJ;MERRITT, K
采用两种模型研究了外科合金的微动腐蚀。首先，控制接骨板和螺钉之间的载荷和运动量，并通过测量组件重量损失和试验溶液中的金属离子浓度来确定不锈钢和MP35N的腐蚀速率。不锈钢的微动腐蚀速率较高。在生理盐水中加入10%血清可显著降低不锈钢和MP35N的腐蚀速率。不锈钢螺钉与MP35N和钛板的混合金属组合使用对不锈钢螺钉的性能影响极小，但MP35N接骨板的微动腐蚀增加。在第二个模型中，将接骨板应用于玻璃纤维增强塑料管作为骨模拟物，并承受循环轴向载荷。这些结果表明，与螺钉扭矩增加和轴向载荷降低相关的微动腐蚀速率降低。腐蚀率最小的完整管模拟愈合的骨折和最大的切割断裂模拟。这些模型已被证明是有用的不同合金的微动腐蚀速率的评估和评估的变量，如分数的稳定性。
Two models were used to study fretting corrosion of surgical alloys. In the first, the amount of load and motion between plates and screws was controlled, and corrosion rates of stainless steel and MP35N were determined by measurements of component weight loss and metal ion concentration in the test solutions. Stainless steel had the higher rate of fretting corrosion. The addition of 10% serum to saline resulted in a significant reduction of the corrosion rate of stainless steel and MP35N. The use of stainless steel screws in a mixed-metal combination with MP35N and titanium plates showed minimal effects on the performance of the stainless steel screws but an increase in fretting corrosion of the MP35N plates. In the second model, plates were applied to glass fiber-reinforced plastic tubes as bone analogues and subjected to cyclic axial loads. These results demonstrated a reduction in fretting corrosion rates associated with an increase in screw torque and a decrease in axial load. Corrosin rates were minimal with intact tubes simulating healed fractures and greatest with an oblique-cut fracture simulation. These models have proven useful for the evaluation of fretting corrosion rates of different alloys and for evaluation of variables such as fraction stability.