Patellofemoral resurfacing at total knee arthroplasty.
A retrospective review of 268 primary total knee arthroplasties (TKAs) with a mean follow-up of four years is presented. The patellae were resurfaced in all cases. There were six complications (2.2%) referable to the patellofemoral articulation: three subluxations, one patellar fracture, one loosening of a metal-backed patellar component, and one patellar tendon avulsion. Successful patellofemoral resurfacing (PFR) can be accomplished with minimal complications if the following technical considerations are met: 5-7 degrees of valgus alignment; medial placement of the patellar component; taking care not to increase either the AP diameter of the knee or the thickness of the patella; avoiding internal rotation of either the tibial or femoral components and proper soft tissue balancing. A thorough review of patellofemoral complications after TKA is presented, and technical considerations relevant to the successful performance of PFR are discussed.
Harwin
S F
SF
Albert Einstein College of Medicine, New York, New York, USA.
Stein
A J
AJ
Stern
R E
RE
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001178:Arthroplasty / Q000379:methods; D015331:Cohort Studies; D005260:Female; D005269:Femur / Q000601:surgery*; D006801:Humans; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D010329:Patella / Q000601:surgery*; D011183:Postoperative Complications / Q000209:etiology; D011474:Prosthesis Design; D012189:Retrospective Studies