Article
Cementless versus hybrid total knee arthroplasty – a case control study
Search Medline for
Authors
Published: | October 21, 2010 |
---|
Outline
Text
Objective: 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 compared to hybrid fixed knee endoprosthesis using a cemented tibial and cementless femoral component.
Methods: We performed a case controlled, single center study including 145 TKAs. From 2003 to 2006, we implanted 55 cementless (group 1) and 90 hybrid fixed endoprostheses (group 2; control group). We analyzed the radiographic and clinical outcome, as well as survivorship of the cementless implants compared to the control group, at a mean follow-up of 3.5 years (minimum 2 years). The SPSS programm was used for statistical analyses.
Results and conclusions: 101 patients with 108 TKAs (74.5%) completed the two-year assessment. Knee Society Scores increased significantly in both the study group and the control group (p<0.001). In total, 9 revisions (8.3%) were required, 5 in the cementless group, 4 in the hybrid cemented group (p=0.345). In both groups, 2 revisions (p=0.701) were necessary due to loosening of the tibial tray. Radiological investigation showed a greater number of radiolucent lines around the tibial baseplate in the cemented (n=26) than in the cementless group (n=12) (p=0.005).
At two years postoperatively, there was no significant difference between cementless Plasmapore® titanium-coated and partially cemented TKA in terms of clinical and functional results and postoperative complications. In our opinion, the significantly smaller number of radiolucent lines in the cementless group is an important requirement for durable long-term fixations in TKA.