Division of Orthopaedic Surgery, London Health Sciences Centre, Ontario, Canada.
J Arthroplasty. 2014 Feb;29(2):365-8. doi: 10.1016/j.arth.2013.05.029. Epub 2013 Jul 1.
This was a retrieval analysis of 83 PS inserts to assess the effect of limb alignment, implant position and joint line position on the pattern of wear in posterior stabilized (PS) tibial inserts. The total damage score was significantly higher in knees with postoperative varus alignment more than 3° (P = 0.03). The total damage score to the post was significantly more in knees with joint line elevation more than 5 mm (9.7 ± 3.9, compared to 6.5 ± 3.7 in knees with less joint line elevation) (P = 0.05). Limb malalignment and joint line elevation resulted in more damage in PS inserts. An external rotation subluxation damage pattern was found in joint line elevation.
这是一项对 83 个 PS 插入物的检索分析，旨在评估肢体对线、植入物位置和关节线位置对后稳定（PS）胫骨插入物磨损模式的影响。术后出现超过 3°的内翻对线的膝关节总损伤评分明显更高（P = 0.03）。与关节线抬高小于 5 毫米的膝关节（6.5 ± 3.7）相比，关节线抬高超过 5 毫米的膝关节后柱的总损伤评分明显更高（9.7 ± 3.9）（P = 0.05）。肢体对线不良和关节线抬高导致 PS 插入物的更多损伤。在关节线抬高的情况下发现了外旋半脱位损伤模式。
