title: Clinical and radiologic survivorship of cementless tibial components fixed with finned polyethylene pegs.
abstract: One hundred twenty patients (22 men, 98 women; 144 knees) with uncemented Freeman-Samuelson total knee arthroplasty were followed prospectively. Eighty-one patients had rheumatoid arthritis and 39 patients had osteoarthrosis. The mean follow-up period was 6.8 years. Three different types of tibial components were used: a high-density polyethylene component without stem, a metal-backed tibial component without stem, and a metal-backed tibial component with stem. Progressive varus tilting turned out to be an early sign of failure and occurred in 22% of the tibial components. Revision of the tibial component was done in 17 knees. Survival analysis with revision as endpoint revealed a survival rate of 79% at a follow-up period of 10 years. Cementless fixation of this design using macrointerlocking pegs and no other stabilization resulted in poor fixation and a high revision rate and cannot be recommended.
authors.affiliation: Department of Orthopaedics, Institute of Surgical Sciences, Sahlgrenska University Hospital, Göteborg University, Sweden.
authors.forename: L
authors.initials: L
authors.lastname: Regnér
authors.forename: L
authors.initials: L
authors.lastname: Carlsson
authors.forename: J
authors.initials: J
authors.lastname: Kärrholm
authors.forename: P
authors.initials: P
authors.lastname: Herberts
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001172:Arthritis, Rheumatoid / Q000601:surgery; D019645:Arthroplasty, Replacement, Knee; D005260:Female; D006801:Humans; D007719:Knee Joint; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D010003:Osteoarthritis / Q000601:surgery; D011095:Polyethylenes; D011446:Prospective Studies; D011474:Prosthesis Design; D011475:Prosthesis Failure; D012086:Reoperation; D013977:Tibia
chemical_list: D011095:Polyethylenes