Does Patellectomy Jeopardize Function After TKA?

Abstract

Level III, therapeutic study. See Instructions for Authors for a complete description of levels of evidence.

Total Knee Arthroplasty in a Patient with an Ankylosing Knee after Previous Patellectomy

“…Lennox et al 2) reported on 11 patients who had had a patellectomy and subsequently had a TKA with a semiconstrained prosthesis: good to excellent results were noted in only 5 of the 11 patients compared with all 11 patients in the control group with the intact patella. Yao et al 10) compared 52 patellectomized knees, 48 of which had PS implants and only four had CR prostheses, to 50 intact patellae group. In the post-patellectomy group, functional scores were worse compared to the control group, but patient's perception of pain relief and functional improvements after TKA were comparable to those of the control group.…”

Influence of gender and age on distal femur shape. Are there any relevant differences?

“…The patellae increase the distance from the extensor mechanism to the femoral rotation center, raising the muscular lever arm. 20 Maintaining this distance after TKA is essential, especially in elderly patients who mostly have sarcope- nia. 21 Femurs were asymmetrical in 81% of cases, which can directly influence the surgery outcome.…”

Patellarekonstruktion bei defizientem knöchernen Lager

“…Als Beispiel füreine Augmentationsplastikist die Methode von Hanssen zu erwähnen [8]. Dabei (17)(18)(19)(20)(21)(22)5) gegenüber intraoperativ von 7-9 mm gemessen werden [8].…”

“…Pathologie) mit nachfolgender KTEP zeigen schlechtere funktionelle Ergebnisse[4,5,7,22]. Da die patellare Komponente einen hohen Stellenwert in der Biomechanik des Kniegelenkes hat, gilt es die Patellektomie zu vermeiden.Chang untersuchte 9 Patienten nach Patellatrümmerfraktur und liegender Prothese, die danach patellektomiert wurden.…”