1Department of Orthopaedics, Sancheti Institute for Orthopaedics and rehabilitation, Pune, Maharashtra, India.
Address for correspondence: Dr Ashok K Shyam, Sancheti Research department, Sancheti Institute for Orthopaedics and Rehabilitation, first floor, Shivaji nagar, Pune, Maharashtra, India. Email: drashokshyam@yahoo.co.uk
Total knee arthroplasty has become treatment of choice in severe osteoarthritis. High flexion designs have been recently promoted as offering better range of motion; however clinical significance of the improved range is still debatable. The purpose of this study was to compare clinical, functional and radiological outcome following TKA done with high flex (INDUS Knee) and conventional posteriorly stabilized prosthesis.
One Hundred patients were entered between Jan 2007 to April 2008 into a prospective nonrandomised trial in which 50 patients received Indus knee TKA prosthesis and 50 patients received PFC sigma (conventional posteriorly stabilized TKA prosthesis).
On follow up of 1 year, there was no difference in pain, flexion deformity, and knee score in both the groups. There was significant difference in Range of motion with final range of motion achieved of Indus knee much better than the conventional posteriorly stabilized group and better final functional score of Indus group (p <0.01).
In summary this prospective nonrandomised trial demonstrated the INDUS group has better range of motion and function score as compared to the conventional posteriorly stabilized TKA prosthesis group. The improvement in the pain score, flexion deformity and knee score were comparable in both the groups. Longterm evaluation will be required to comment on differences in implant longevity.
knee arthroplasty, nonrandomised trial, Indus knee, PFC Sigma, range of motion, outcome scores
