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Hip and Knee Arthroplasty - Surface Hippy Guide to Hip Resurfacing

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Table HT27:<br />

Primary Conventional Total <strong>Hip</strong> Replacement requiring Revision by<br />

Bearing <strong>Surface</strong> <strong>and</strong> Femoral Component Head Size (Primary Diagnosis OA<br />

excluding Infection)<br />

Bearing <strong>Surface</strong> by<br />

Femoral Component Size<br />

Number<br />

Revised<br />

Total<br />

Number<br />

Observed<br />

Component<br />

Years<br />

Revisions per<br />

100 Observed<br />

Component<br />

Years<br />

Exact 95%<br />

CI<br />

Ceramic/Ceramic ≤28mm 154 4711 18521 0.8 (0.71, 0.97)<br />

Ceramic/Ceramic >28mm 277 15862 44759 0.6 (0.55, 0.70)<br />

Ceramic/Polyethyle ≤28mm 301 10480 42912 0.7 (0.62, 0.79)<br />

Ceramic/Polyethyle >28mm 29 3458 5537 0.5 (0.35, 0.75)<br />

Metal/Metal ≤28mm 72 2560 11562 0.6 (0.49, 0.78)<br />

Metal/Metal >28mm 171 9606 16625 1.0 (0.88, 1.19)<br />

Metal/Polyethylene ≤28mm 1014 47647 174860 0.6 (0.54, 0.62)<br />

Metal/Polyethylene >28mm 158 14526 25704 0.6 (0.52, 0.72)<br />

Total 2176 108850 340482 0.6 (0.61, 0.67)<br />

Note:<br />

Artek Metal Cup has been excluded from analysis as it has a higher than anticipated revision rate.<br />

Figure HT22:<br />

Cumulative Percent Revision of Primary Conventional Total <strong>Hip</strong><br />

Replacement by Bearing <strong>Surface</strong> <strong>and</strong> Femoral Component Head Size<br />

≤28mm (Primary Diagnosis OA excluding Infection)<br />

Number at Risk 0 Yr 1 Yr 2 Yrs 3 Yrs 4 Yrs 5 Yrs 6 Yrs 7 Yrs<br />

Ceramic/Ceramic 4711 4263 3826 3199 2440 1627 708 151<br />

Ceramic/Poly 10480 9720 8689 7383 5681 3733 1936 582<br />

Metal/Metal 2560 2401 2206 1978 1715 1286 601 100<br />

Metal/Poly 47647 42192 36151 29072 21475 13902 6712 1795<br />

80

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