Rand J A, Gustilo B
Department of Orthopedic Surgery, Mayo Clinic Scottsdale, Scottsdale, Arizona 85259, USA.
Acta Orthop Belg. 1996;62 Suppl 1:154-63.
A comparison of 135 resurfacing with 116 inset biconvex patellar components with a single total knee arthroplasty design was performed. At 2.5 +/- 0.5 years postoperatively, patellar tilt in the resurfacing group was 4 degrees +/- 6 degrees compared with 0.5 degree +/- 5 degrees in the biconvex group (p < 0.0001). Lateral patellar subluxation was 6% +/- 10% in the resurfacing group compared with 3% +/- 9% in the biconvex group (p < 0.05). Lateral release was required in 79% of the resurfacing group compared with 56% in the biconvex group (p < 0.0001). Complete patellar radiolucent lines were seen adjacent to 4 biconvex and 2 resurfacing patellar prostheses. Patellar radiolucent lines were seen more frequently in area 1 in the biconvex group compared with the resurfacing group (p < 0.01). An inset patellar implant appears to provide better radiographic alignment than a resurfacing implant, but it has a higher incidence of radiolucent lines.
对135例表面置换与116例内嵌双凸髌骨部件采用单一全膝关节置换设计进行了比较。术后2.5±0.5年，表面置换组的髌骨倾斜度为4°±6°，而双凸组为0.5°±5°（p<0.0001）。表面置换组的髌骨外侧半脱位为6%±10%，双凸组为3%±9%（p<0.05）。表面置换组79%需要进行外侧松解，双凸组为56%（p<0.0001）。在4个双凸髌骨假体和2个表面置换髌骨假体旁可见完全的髌骨透亮线。与表面置换组相比，双凸组在区域1更频繁地出现髌骨透亮线（p<0.01）。内嵌式髌骨植入物似乎比表面置换植入物提供更好的影像学对线，但透亮线的发生率更高。
