title: Comparison of cementless and hybrid cemented total knee arthroplasty.
abstract: Cementless total knee arthroplasty (TKA) implants were designed to provide long-term fixation without the risk of cement-associated complications. The purpose of this study was to evaluate the outcome of titanium-coated cementless implants compared with hybrid TKA implants with a cemented tibial and a cementless femoral component. The authors performed a case-control, single-center study of 120 TKAs performed between 2003 and 2007, including 60 cementless and 60 hybrid cemented TKAs. The authors prospectively analyzed the radiographic and clinical data and the survivorship of the implants at a minimum follow-up of 5 years. Ninety patients who underwent TKA completed the 5-year assessment. Knee Society Scores increased significantly in both groups (P<.001). In both groups, 2 patients underwent revision due to aseptic tibial component loosening, resulting in a 96% implant survival rate. Radiographs showed significantly less radiolucent lines around the tibial baseplate in the cementless group (n=12) than in the hybrid cemented group (n=26) (P=.009).At 6-year mean follow-up, no significant difference existed between the cementless and hybrid cemented tibial components in TKA in terms of clinical and functional results and postoperative complications. The significantly smaller number of radiolucent lines in the cementless group is an indicator of primary stability with the benefit of long-term fixation durability of TKA.
authors.affiliation: Department of Orthopaedics, Vienna Medical University, Vienna General Hospital, Vienna, Austria. richard.lass@meduniwien.ac.at
authors.forename: Richard
authors.initials: R
authors.lastname: Lass
authors.forename: Bernd
authors.initials: B
authors.lastname: Kubista
authors.forename: Johannes
authors.initials: J
authors.lastname: Holinka
authors.forename: Martin
authors.initials: M
authors.lastname: Pfeiffer
authors.forename: Spiro
authors.initials: S
authors.lastname: Schuller
authors.forename: Sandra
authors.initials: S
authors.lastname: Stenicka
authors.forename: Reinhard
authors.initials: R
authors.lastname: Windhager
authors.forename: Alexander
authors.initials: A
authors.lastname: Giurea
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee; D001672:Biocompatible Materials; D001843:Bone Cements; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D011474:Prosthesis Design; D014025:Titanium
chemical_list: D001672:Biocompatible Materials; D001843:Bone Cements; D014025:Titanium