title: Patella Fractures Prior to Total Knee Arthroplasty: Worse Outcomes but Equivalent Survivorship.
abstract: Distal femur and/or tibial plateau fractures adversely affect outcomes of TKA; however it is unknown if a previous patella fracture affects outcome. We reviewed 113 patients undergoing TKA with a previous patella fracture from 1990 to 2012. Component survival was compared to 19,641 patients undergoing TKA for osteoarthritis during the same period. The 15-year implant survivals following a previous patella fracture was 86%. There was no difference in implant survival compared to patients undergoing TKA for OA (P=0.31). Knee society scores significantly improved following TKA; however patients with a fracture had complications related to knee flexion. Patients undergoing primary TKA following a patella fracture have similar overall revision free survival compared to those undergoing TKA for OA at 15-years.
authors.affiliation: Mayo Clinic, Department of Orthopedic Surgery, Rochester, Minnesota.
authors.forename: Matthew T
authors.initials: MT
authors.lastname: Houdek
authors.affiliation: Mayo Clinic, Department of Orthopedic Surgery, Rochester, Minnesota.
authors.forename: Steven F
authors.initials: SF
authors.lastname: Shannon
authors.affiliation: Mayo Clinic, Department of Orthopedic Surgery, Rochester, Minnesota.
authors.forename: Chad D
authors.initials: CD
authors.lastname: Watts
authors.affiliation: Mayo Clinic, Department of Orthopedic Surgery, Rochester, Minnesota.
authors.forename: Eric R
authors.initials: ER
authors.lastname: Wagner
authors.affiliation: Mayo Clinic, Department of Orthopedic Surgery, Rochester, Minnesota.
authors.forename: Stephen A
authors.initials: SA
authors.lastname: Sems
authors.affiliation: Mayo Clinic, Department of Orthopedic Surgery, Rochester, Minnesota.
authors.forename: Rafael J
authors.initials: RJ
authors.lastname: Sierra
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000009:adverse effects / Q000706:statistics & numerical data*; D005260:Female; D005269:Femur / Q000601:surgery; D050723:Fractures, Bone; D006801:Humans; D007719:Knee Joint / Q000601:surgery; D008297:Male; D008875:Middle Aged; D010003:Osteoarthritis / Q000601:surgery; D010329:Patella / Q000293:injuries*; D012189:Retrospective Studies; D013977:Tibia / Q000601:surgery; D016896:Treatment Outcome; D055815:Young Adult
keywords: outcomes; patella fracture; postoperative complications; posttraumatic; total knee arthroplasty