title: Excellent fixation achieved with cementless posteriorly stabilized total knee arthroplasty.
abstract: Cementless posteriorly stabilized (PS) total knee arthroplasty has not been widely accepted primarily because of prior unpredictable results and concern about micromotion at the tibial fixation interface caused by the cam/post interaction. A prospective consecutive series of 114 cementless, tricompartmental periapatite-coated single-radius PS implants in 110 patients with a mean age 62 years was performed to determine if initial stability and biologic fixation could be achieved. At a mean follow-up of 36 months, all implants demonstrated radiographic evidence of stable biologic fixation with no evidence of loosening, osteolysis, stress shielding, or progressive radiolucent lines. Based on these early results, cementless, periapatite-coated single-radius PS total knee arthroplasty offers marked promise.
authors.affiliation: Total Hip and Knee Arthroplasty Service, Beth Israel Medical Center, New York, New York, USA.
authors.forename: Steven F
authors.initials: SF
authors.lastname: Harwin
authors.forename: Mark A
authors.initials: MA
authors.lastname: Kester
authors.forename: Arthur L
authors.initials: AL
authors.lastname: Malkani
authors.forename: Michael T
authors.initials: MT
authors.lastname: Manley
mesh_terms: D000328:Adult; D000368:Aged; D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D020099:Coated Materials, Biocompatible; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D011474:Prosthesis Design; D011859:Radiography
chemical_list: D020099:Coated Materials, Biocompatible