Open Access
Table 3
A comparison of the number and proportion of acetabular cups placed outside the two referenced safe zones among robot-assisted and conventional THA cohorts.
| Variables | Outside Callanan |
Outside Lewinnek |
|---|---|---|
| Zone n (%) | Zone n (%) | |
| Robot-assisted THA (N = 108) | ||
| Pre-op plan | 0 (0) | 0 (0) |
| Intra-op robotic-arm measurement | 9 (8.3) | 5 (4.6) |
| Post-op CT-scan measurement | 74 (68.5) | 70 (64.8) |
| Conventional THA (N = 43) | ||
| Pre-op plan | 18 (41.8) | 9 (20.9) |
| Post-op CT-scan measurement | 32 (74.4) | 31 (72.1) |
THA = total hip arthroplasty; pre-op = pre-operative, intra-op = intra-operative, post-op = post-operative.
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