2015 ISAKOS Biennial Congress Paper #0

Patient Specific Balanced TKA: A Five Year Outcome, Patient Satisfaction and Survival Study

Mark G. Clatworthy, FRACS, Auckland NEW ZEALAND
Nicola Blucher , BA MA MBBS FRCS, London UNITED KINGDOM
J Donald Hansom, FRCS, MD, MBChB, BSc (Hons), Fintry, Stirling UNITED KINGDOM
Jérôme Murgier, MD, Biarritz, Europe FRANCE

Ascot Hospital, Auckland , NEW ZEALAND

FDA Status Cleared

Summary: This study demonstrates excellent outcome scores, high patient satisfaction and a low failure rate with a patient specific navigated balanced TKA technique

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Abstract:

Aim

Recent studies have shown wide variation in the bony anatomy and soft tissue envelope of the knee and a neutral mechanical axis is not necessarily required for long term TKA survival. In response a patient specific navigated balanced TKA technique has been developed enabling bounded anatomical implant placement with small positional changes made to implant a TKA optimally within it’s natural soft tissue envelope. The aim of this study is to report the five year patient outcome, satisfaction and survival of this technique.

Method

A single surgeon prospective study of 1180 consecutive Attune TKA’s was performed with Brainlab 3. Outcome scores: Oxford, WOMAC, KOOS, Forgotten Knee scores and patient satisfaction were collected at one, two and five years and an implant survival analysis was performed. The five year data is presented in this study

Results

The mean Oxford score was 44.1 The mean Forgotten Knee score 73.1 The mean WOMAC score was 8.2. KOOS Joint Replacement score was 87.4. Patient satisfaction was 97.1% and 95.3% would have the operation again. The survival at six years was 99.1%

Discussion

This study demonstrates excellent outcome scores, high patient satisfaction and a low failure rate with a patient specific navigated balanced TKA technique