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Foot Ankle Int. 2010 Jul;31(7):592-9. doi: 10.3113/FAI.2010.0592.

Mid-term results of the Moje Hallux MP joint replacement.

Author information

  • 1Glasgow Royal Infirmary, Trauma & Orthopaedics, 84 Castle Street, Glasgow, G4 0SF, Scotland. iainmcgraw@doctors.org.uk

Abstract

BACKGROUND:

There are reports of good early results in small numbers of patients implanted with the 'Moje' ceramic prosthesis. Published evidence thus far involves only small groups of patients with short-term followup. The purpose of this prospective study was to evaluate the emerging mid-term clinical and radiographic results from our center.

MATERIALS AND METHODS:

We describe our single-surgeon experience of 63 components in 48 patients at a mean followup of 44 months. Patient satisfaction was assessed by questionnaire and radiographic assessment performed immediately post operatively and at the latest followup.

RESULTS:

Mean American Orthopaedic Foot and Ankle Society (AOFAS) Hallux score increased from 56 to 72 (p < 0.01) and mean satisfaction score was 7.6 (scale 1-10). Sixty-seven percent reported minimal or no pain. Five implants have been removed (8%), four because of pain associated with implant loosening and subsidence, and one because of deep infection. Fifty-seven percent of metatarsal and 56% of phalangeal components had subsided and we found radiographic evidence of loosening in 58% of X-rays analyzed at latest followup. Prosthetic subsidence was associated with greater margin of uncovered bone under the prosthesis (p = 0.05 for metatarsal, p = 0.03 for proximal phalanx component) and longer followup (p < 0.001).

CONCLUSION:

In spite of the good clinical outcome at the mid-term stage with 91% implant survival, given the widespread loosening and subsidence encountered in our study, the long-term outcome following this procedure is uncertain.

PMID:
20663425
[PubMed - indexed for MEDLINE]
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