title: Effect of femoral component design on patellofemoral crepitance and patella clunk syndrome after posterior-stabilized total knee arthroplasty.
abstract: The purpose of this study was to determine if recent changes to the femoral component of a particular posterior-stabilized total knee prosthesis would affect the incidence of postoperative patellofemoral crepitance and patella clunk syndrome. One hundred eight total knee arthroplasties were performed with the conventional design; 136 were performed after the femoral component was changed. Complications were compared between the groups with an average follow-up of 17.7 months and 12.4 months, respectively. Thirteen knees with the conventional design (12%) were found to have patellofemoral complications; no complications were noted with the new design (P < .0001). Femoral components with a deep trochlear groove and smooth transition of the intercondylar box appear to better accommodate any peripatellar fibrous nodule that may form after total knee arthroplasty.
authors.affiliation: Department of Orthopaedics, West Virginia University, Morgantown, West Virginia 26506-9196, USA.
authors.forename: Benjamin M
authors.initials: BM
authors.lastname: Frye
authors.forename: Mark W
authors.initials: MW
authors.lastname: Floyd
authors.forename: Dahn C
authors.initials: DC
authors.lastname: Pham
authors.forename: John J
authors.initials: JJ
authors.lastname: Feldman
authors.forename: Brian R
authors.initials: BR
authors.lastname: Hamlin
mesh_terms: D019645:Arthroplasty, Replacement, Knee / Q000009:adverse effects / Q000295:instrumentation* / Q000379:methods; D002921:Cicatrix / Q000150:complications; D005269:Femur / Q000601:surgery; D005500:Follow-Up Studies; D006801:Humans; D015994:Incidence; D007719:Knee Joint / Q000502:physiology / Q000601:surgery; D007720:Knee Prosthesis / Q000009:adverse effects*; D057071:Patellofemoral Joint / Q000503:physiopathology / Q000601:surgery; D046788:Patellofemoral Pain Syndrome / Q000453:epidemiology / Q000209:etiology*; D011183:Postoperative Complications / Q000453:epidemiology / Q000209:etiology*; D011474:Prosthesis Design / Q000009:adverse effects*; D011475:Prosthesis Failure / Q000209:etiology*; D016059:Range of Motion, Articular / Q000502:physiology; D012189:Retrospective Studies; D016896:Treatment Outcome