Risk of fracture after primary total hip arthroplasty using a collared cementless stem or a polished taper-slip cemented stem

There were significantly more IOPFFs with Corail, which occurred in the calcar or greater trochanter, but these had no impact on early recovery or one-year Oxford Hip Scores. Males with the Exeter stem had a five-times greater risk of having a reoperation for POPFF. Females had the same risk of reoperation for fracture with either component. Femoral prosthetic fractures only occurred with the Exeter stem. These results represent robust estimates, which are likely to be more accurate than revision-only studies typically generated from registry data.