The influence of kinematic conditions and design on the wear of patella-femoral replacements.
The influence of kinematic conditions and design on the wear of patella-femoral replacements.
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DOI：
10.1177/0954411913518910
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发表时间：
2014-02
期刊：
影响因子：
--
通讯作者：
Jennings LM
中科院分区：
文献类型：
--
作者：
Maiti R;Fisher J;Rowley L;Jennings LM
经17年随访，膝关节置换术成功率在44%~90%之间。以前已经进行了几项研究，以评估髌股关节的表面磨损。然而，它们并没有包括所有的六个自由度。本研究的目的是开发一种六轴模拟髌股关节的装置，以评估两种设计(圆形和椭圆形圆顶)在不同运动学条件下的磨损率。当髌骨旋转从1°增加到4°时，圆顶磨损率从8.6mm~3/百万次显著增加到12.3mm~3/百万次，P<；0.049。椭圆形圆顶的磨损率从6.3mm~3/百万次增加到14.5mm~3/百万次。然而，这一增长并不显著(p>；0.08)。磨损率的增加可能是由于较高的横向剪切。从被动到受限的髌骨内侧移位的减少导致磨损没有显著的减少(p>；0.06)。两种髌骨设计之间的磨损率没有显著差异(p>；0.28)。所有条件下的体积磨损量与被动髌骨倾斜程度呈正相关(Rho>；0.8)。这是首次在六轴模拟器上对不同运动学条件下的膝关节进行临床前磨损模拟。
The success rate of patella-femoral arthroplasty varies between 44% and 90% in 17 years of follow-up. Several studies have been performed previously for assessing the surface wear in the patella-femoral joint. However, they have not included all six degrees of freedom. The aim of this study was to develop a six-axis patella-femoral joint simulator to assess the wear rate for two patellae designs (round and oval dome) at different kinematic conditions. An increase in patellar rotation from 1° to 4° led to a significantly (p<0.049) increased wear rate of round dome from 8.6 mm3/million cycles to 12.3 mm3/million cycles. The wear rate for oval dome increased from 6.3 mm3/million cycles to 14.5 mm3/million cycles. However, the increase was nonsignificant (p>0.08). The increase in wear rate was likely due to the higher cross shear. A decrease in patellar medial lateral displacement from passive to constrained resulted in a nonsignificant reduction in wear (p>0.06). There was no significant difference in wear rate between the two patellae designs (p>0.28). The volumetric wear under all conditions was positively correlated with the level of passive patellar tilt (rho>0.8). This is the first report of preclinical wear simulation of patella-femoral joint in a six-axis simulator under different kinematic conditions.
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影响因子：
2.4
作者：
Halloran, JP;Petrella, AJ;Rullkoetter, PJ
通讯作者：
Rullkoetter, PJ
DOI：
10.1243/0954411971534638
发表时间：
1997-01-01
影响因子：
1.8
作者：
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通讯作者：
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2.7
作者：
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Roeder, Christoph
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2.4
作者：
Affatato, Saverio;Cristofolini, Luca;Viceconti, Marco
通讯作者：
Viceconti, Marco
影响因子：
2.4
作者：
Ellison, P.;Barton, D. C.;Fisher, J.
通讯作者：
Fisher, J.