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SA Orthopaedic Journal

On-line version ISSN 2309-8309
Print version ISSN 1681-150X

SA orthop. j. vol.7 n.3 Centurion Jul./Sep. 2008




The MIRA prosthesis



U Mennen

MMed(Orth), FRCS(Edin), FRCS(Glasg), FCS(SA)Orth, MD(Orth), DSc(Med)





Osteoarthritis of digital joints, e.g. proximal interphalangeal joints and metacarpophalangeal joints, may need surgical intervention if conservative management has failed to control function loss and/or pain.
The ideal arthroplasty prosthesis should cause minimal loss of bony tissue, should have a high level of congruency, a low degree of constraint and not be technically demanding.
The MIRA prosthesis replaces only the damaged osteoarthritic tissue, is biomechanically sound and respects the all important investing and stabilising capsule-ligamentous and musculo-tendinous structures.



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1. Swanson AB. Silicone rubber implants for replacement of arthritic or destroyed joints in the hand. Surg Clin North Am 1968;48:113-27.         [ Links ]

2. Swanson AB. Implant resection arthroplasty of the proximal interphalangeal joint. Orthop Clin North Am 1973;4:1007-29.         [ Links ]

3. Swanson AB. Remodelling phenomena in flexible implant arthroplasty in the metacarpophalangeal joints: long-term study. Clin Orthop Rel Res 1986;205:254-67.         [ Links ]

4. Vainio K. Korrektur der Ulnardeviation der Finger bei chronischer Polyarthritis. Verh Dtsch Orthop Ges, 43d Congress, Hamburg, September 14-17, 1955.         [ Links ]

5. Vainio K, Reiman I, Pulki T. Results of arthroplasty of the metacarpophalangeal joints in rheumatoid arthritis. Reconstr Surg Traumat 1967;9:1.         [ Links ]



Prof U Mennen
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Waterkloof, 0181 Pretoria
Fax: (012) 344-2276

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