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The Bone & Joint Journal
Vol. 101-B, Issue 10 | Pages 1199 - 1208
1 Oct 2019
Patient and implant survival following intraoperative periprosthetic femoral fractures during primary total hip arthroplasty
Lamb JN Matharu GS Redmond A Judge A West RM Pandit HG
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Aims

We compared implant and patient survival following intraoperative periprosthetic femoral fractures (IOPFFs) during primary total hip arthroplasty (THA) with matched controls.

Patients and Methods

This retrospective cohort study compared 4831 hips with IOPFF and 48 154 propensity score matched primary THAs without IOPFF implanted between 2004 and 2016, which had been recorded on a national joint registry. Implant and patient survival rates were compared between groups using Cox regression.

The Bone & Joint Journal
Vol. 101-B, Issue 7 | Pages 779 - 786
1 Jul 2019
A calcar collar is protective against early periprosthetic femoral fracture around cementless femoral components in primary total hip arthroplasty
Lamb JN Baetz J Messer-Hannemann P Adekanmbi I van Duren BH Redmond A West RM Morlock MM Pandit HG
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Aims

The aim of this study was to estimate the 90-day risk of revision for periprosthetic femoral fracture associated with design features of cementless femoral stems, and to investigate the effect of a collar on this risk using a biomechanical in vitro model.

Materials and Methods

A total of 337 647 primary total hip arthroplasties (THAs) from the United Kingdom National Joint Registry (NJR) were included in a multivariable survival and regression analysis to identify the adjusted hazard of revision for periprosthetic fracture following primary THA using a cementless stem. The effect of a collar in cementless THA on this risk was evaluated in an in vitro model using paired fresh frozen cadaveric femora.