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Hip and Knee Arthroplasty - Surface Hippy Guide to Hip Resurfacing

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Table HT25:<br />

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

Bearing <strong>Surface</strong> (Primary Diagnosis OA excluding Infection)<br />

Bearing <strong>Surface</strong><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 431 20573 63281 0.7 (0.62, 0.75)<br />

Ceramic/Polyethylene 330 13938 48450 0.7 (0.61, 0.76)<br />

Metal/Metal 243 12166 28188 0.9 (0.76, 0.98)<br />

Metal/Polyethylene 1172 62173 200563 0.6 (0.55, 0.62)<br />

Unknown 18 962 3354 0.5 (0.32, 0.85)<br />

Total 2194 109812 343836 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 HT21:<br />

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

Bearing <strong>Surface</strong> (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 20573 16765 13446 10101 6953 4126 1657 294<br />

Ceramic/Poly 13938 11877 9779 7869 5853 3786 1942 582<br />

Metal/Metal 12166 8714 5757 3600 2270 1379 604 100<br />

Metal/Poly 62173 51496 41595 31824 22567 14233 6764 1803<br />

Table HT26:<br />

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

Replacement by Bearing <strong>Surface</strong> (Primary Diagnosis OA excluding<br />

Infection)<br />

CPR 1 Yr 2 Yrs 3 Yrs 5 Yrs 7 Yrs<br />

Ceramic/Ceramic 1.2 (1.1, 1.4) 1.8 (1.6, 2.0) 2.2 (2.0, 2.4) 2.8 (2.6, 3.2) 3.1 (2.8, 3.5)<br />

Ceramic/Polyethylene 1.4 (1.2, 1.6) 1.9 (1.6, 2.1) 2.3 (2.0, 2.5) 3.0 (2.6, 3.3) 3.5 (3.1, 4.1)<br />

Metal/Metal 1.3 (1.1, 1.5) 2.0 (1.7, 2.3) 2.6 (2.2, 2.9) 3.2 (2.8, 3.8) 4.4 (3.5, 5.7)<br />

Metal/Polyethylene 1.1 (1.0, 1.2) 1.5 (1.4, 1.6) 1.8 (1.7, 1.9) 2.5 (2.4, 2.7) 3.3 (3.0, 3.6)<br />

Unknown 1.5 (0.9, 2.6) 1.8 (1.1, 2.9) 1.9 (1.2, 3.1) 2.2 (1.3, 3.5) 2.2 (1.3, 3.5)<br />

79

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