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TKA prosthesis modifications did not improve clinical or radiographic outcomes
Recent modifications in the design of a high flexion total knee arthroplasty prosthesis did not provide meaningful improvements in short-term clinical or radiographic postoperative outcomes, according to study findings.
Researchers divided 524 patients who underwent primary total knee arthroplasty (TKA) into group one, in which a high flexion prosthesis (HF-1) was used, and group 2, in which a more recently devised high flexion prosthesis (HF-2) was used. Clinical outcomes measured included range of motion (ROM), the Knee Society knee (KSKS) and function (KSFS) score, WOMAC scores, radiologic evaluation and surgery-related complications.
At the 2-year follow-up, results showed no clinical or radiographic differences between the two groups. For patients who received the HF-1, mean ROM was 123°, compared with a mean ROM of 124° in patients who received the HF-2. The researchers also found a KSKS of 90 in the HF-1 group vs. 89.1 in the HF-2 group, as well as a KSFS of 76.6 in the HF-1 group compared with a KSFS of 81.8 in the HF-2 group.
Total WOMAC scores were 23.1 in the HF-1 group and 24.9 in the HF-2 group. The researchers observed no differences in the incidences of radiolucency on radiographs, and only one case of dislocation in the HF-1 group.
Disclosures: The researchers report no relevant financial disclosures.