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Hip and Knee Arthroplasty - Surface Hippy Guide to Hip Resurfacing

Hip and Knee Arthroplasty - Surface Hippy Guide to Hip Resurfacing

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Table HT41:<br />

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

Component Head Size (Primary Diagnosis OA excluding Infection)<br />

Femoral<br />

Component<br />

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 />

≤44mm 61 959 3140 1.9 (1.49, 2.50)<br />

45-49mm 103 2423 7016 1.5 (1.20, 1.78)<br />

50-54mm 101 6001 18523 0.5 (0.44, 0.66)<br />

≥55mm 7 573 1581 0.4 (0.18, 0.91)<br />

Total 272 9956 30260 0.9 (0.80, 1.01)<br />

Figure HT32:<br />

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

Replacement by Femoral Component Head Size (Primary Diagnosis OA<br />

excluding Infection)<br />

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

≤44mm 959 789 664 522 387 221 93 13<br />

45-49mm 2423 1957 1510 1090 716 423 173 14<br />

50-54mm 6001 5040 4035 2982 2027 1152 380 50<br />

≥55mm 573 451 335 225 152 105 33 6<br />

Table HT42:<br />

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

Replacement by Femoral Component Head Size (Primary Diagnosis OA<br />

excluding Infection)<br />

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

≤44mm 2.9 (2.0, 4.2) 3.9 (2.8, 5.5) 5.4 (4.0, 7.2) 9.0 (6.8, 11.8)<br />

45-49mm 2.6 (2.1, 3.4) 3.6 (2.9, 4.4) 4.3 (3.4, 5.3) 5.7 (4.6, 7.1)<br />

50-54mm 1.3 (1.0, 1.6) 1.6 (1.3, 1.9) 1.7 (1.4, 2.1) 2.2 (1.8, 2.7) 2.4 (1.9, 3.1)<br />

≥55mm 0.9 (0.4, 2.2) 1.2 (0.5, 2.6) 1.2 (0.5, 2.6) 1.7 (0.7, 3.8)<br />

93

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