Patellofemoral crepitation and clunk following modern, fixed-bearing total knee arthroplasty.
Patellar crepitation and clunk (PCC) is an important and modifiable complication of total knee arthroplasty (TKA). We calculated the incidence of PCC using a modern fixed-bearing TKA prosthesis, assessed whether PCC is associated with knee range of motion, and determined if there were any radiographic variables associated with the development of PCC in this prosthetic design. Five hundred seventy primary TKAs were evaluated after a mean follow-up of 24 months (range 12-81). Thirty-four knees developed PCC (6%); 6 required arthroscopic debridement. With each degree increase in the flexion angle, the likelihood of developing PCC increased by 4.2%. The incidence of PCC was low but increased with postoperative flexion ≥ 110°. No radiographic parameters were associated with the development of PCC.
Department of Orthopaedic Surgery, Hospital Severo Ochoa, Avenida de Orellana, Leganes (Madrid), Spain.
Juan V
JV
Peralta-Molero
Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York.
Brian P
BP
Gladnick
Division of Biostatistics and Epidemiology, Hospital for Special Surgery, New York, New York.
Yuo-Yu
YY
Lee
Department of Orthopaedic Surgery, Jimenez Dias Foundation Hospital, 28040, Madrid, Spain.
Andres Vergara
AV
Ferrer
Division of Biostatistics and Epidemiology, Hospital for Special Surgery, New York, New York.
Stephen
S
Lyman
Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York.
Alejandro
A
González Della Valle
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000009:adverse effects*; D005260:Female; D006801:Humans; D007720:Knee Prosthesis / Q000009:adverse effects*; D008297:Male; D008875:Middle Aged; D057071:Patellofemoral Joint / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery*; D011474:Prosthesis Design; D011859:Radiography; D016059:Range of Motion, Articular; D016896:Treatment Outcome
incidence; patellar clunk; patellar crepitation; radiographic parameters; range of motion; total knee arthroplasty