title: The Insall-Burstein II prosthesis: a 5- to 9-year follow-up study in osteoarthritic knees.
abstract: We prospectively studied 100 Insall-Burstein Posterior Stabilized II total knee arthroplasties (Zimmer Inc, Warsaw, IN) consecutively implanted in 91 patients with osteoarthritis. We reviewed 92 knees in 85 patients at a mean follow-up of 7.5 years (range, 5.3-9.5 years). According to the Knee Society score, 78 (85%) results were excellent, 11 (12%) were good, and 3 (3%) were fair or poor. The unsatisfactory results were attributed to patellofemoral pain with a low patella (2 knees) and to valgus alignment and medial laxity (1 knee). Flexion at follow-up averaged 116 degrees. Nonprogressive radiolucent lines were present around 30% of the tibial components. There was only 1 small osteolytic lesion around the tibial plateau. We observed no aspetic loosening, infection, or patella stress fracture. Survivorship analysis in the worst-case scenario showed a 90.9% success rate at 8 years.
authors.affiliation: First Orthopaedic Clinic, University of Florence, Florence, Italy.
authors.forename: P F
authors.initials: PF
authors.lastname: Indelli
authors.forename: P
authors.initials: P
authors.lastname: Aglietti
authors.forename: R
authors.initials: R
authors.lastname: Buzzi
authors.forename: A
authors.initials: A
authors.lastname: Baldini
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000000981:diagnostic imaging / Q000601:surgery*; D011446:Prospective Studies; D011474:Prosthesis Design; D011859:Radiography; D013997:Time Factors; D016896:Treatment Outcome