Etiology and prosthesis model have no influence in the functional outcomes of total knee arthroplasty revision surgery at five years.

BACKGROUND

The rising number of total knee arthroplasty (TKA) replacements and their uncertain functional results according to the revision etiology and the prosthesis model implanted are a challenge for orthopedic surgeons and patients. A better knowledge of these results is mandatory to make the best decision. We present our clinical outcomes with a 5-year follow-up.

METHODS

We retrospectively reviewed 104 patients, 108 knees (77 aseptic and 31 septic), who underwent TKA revision surgery from 2007 to 2017 with three different models of prosthesis. KSS score, range of motion (ROM), pain, and independence for walking were recorded at 5 years according to our own database and the clinical interview and compared to the different models of prosthesis and the etiology of the revision.

RESULTS

The results showed 81.5 % of good or excellent functional outcomes in our patients with a mean KSS score of 76,7 ± 14,3, a mean ROM of 1.68 ± 0.30 radians, and 77 % of them are independent for walking without any aids. The results do not show any difference between the groups comparing the model of prosthesis and the etiology of the revision surgery.

CONCLUSIONS

At 5 years, TKA revision surgery offers good clinical and functional outcomes, independence for walking, good range of motion, and low residual pain regardless of the cause of the revision or the model of prosthesis.