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MINIMALLY INVASIVE UNICOMPARTMENTAL ARTHROPLASTY (MIU)



Abstract

This paper reports the authors’ experience of over 850 unicompartmental knee replacements beginning in 1985 with the MG2 uni and then the LCS uni in 1995, and more recently with the Allegretto, Oxford and PFC minimally invasive uni.

Minimally invasive unicompartmental knee arthroplasty (MIU) offers the knee arthritis patient significant benefits compared with total knee arthroplasty. Some of these are especially important for Asian patients, in particular range of movement and ability to squat.

The ideal indications for the MIU are not yet fully established but are becoming clearer. Contraindications are also clearer.

These issues will be discussed in detail. The results in 100 cases of unicompartmental arthroplasty will be presented and discussed along with the complications in these patients. Special considerations and recommendations for the commencement of MIU will also be discussed.

This recent and popular procedure also presents the knee surgeon with significant challenges. However, there are also disadvantages which will be outlined.

The surgical technique of the MIU will be shown in detail. The paper closes on a brief discussion into recent developments by an 8 member international group of knee surgeons of a new MIU offering a choice of fixed or mobile bearing MIU, with precise instrumentation of both the femoral and tibial sides, and the early result of the first 18 procedures in 15 patients (3 bilateral).

The abstracts were prepared by Professor Jegan Krishnan. Correspondence should be addressed to him at the Flinders Medical Centre, Bedford Park 5047, Australia.