Postoperative Periprosthetic Fractures in Hip Fracture Patients: Exeter vs Anatomic SP2 Lubinus Stem

Study Overview
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Brief Summary
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Recent studies have indicated a high incidence of postoperative periprosthetic femoral fracture in elderly patients treated with two commonly used cemented polished, tapered femoral stems. The aim of this study was to compare the prevalence and incidence rate of PPF in a cohort of elderly with femoral neck fractures (FNF) treated with either a collarless, polished, tapered stem (Exeter) or an anatomic matte stem (Lubinus SP 2). Patients and Methods In a multicentre retrospective cohort study 2529 patients 60 years and above, with a FNF as indication for primary surgery with a cemented hip arthroplasty were included. Patients were treated either with a polished tapered Exeter stem or a matte anatomic Lubinus SP12 stem according to the surgeons preference or to the praxis of the present department. The incidence of perprosthetic femoral fractures Hip-related complications and repeat surgery were assessed at a minimum follow-up of 2 years postoperatively.

Official Title
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Postoperative Periprosthetic Fractures in Hip Fracture Patients: Comparison of the Exeter Stem and the Anatomic SP2 Lubinus Stem

Conditions
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Femoral Neck Fractures, Periprosthetic Fractures

Intervention / Treatment
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* Procedure: Exeter stem
* Procedure: Lubinus SP2 stem


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Femoral neck fracture Treated with hip arthroplasty with Exeter or SP2 stem Exclusion Criteria: Patological fracture Other typ of stem

Ages Eligible for Study
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Minimum Age: 60 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Lubinus SP2 stem<br>Patients treated with a cemented Lubinus SP2 stem for a femoral neck fracture. Both total hip arthroplasty and hemiarthroplasty are included. | Procedure: Lubinus SP2 stem<br>* Patients treated with an total or hemiarthroplasty using a SP2stem for a displaced femoral neck fracture<br>|
| Exeter stem<br>Patients treated with a cemented Exeter stem for a femoral neck fracture. Both total hip arthroplasty and hemiarthroplasty are included. | Procedure: Exeter stem<br>* Patients treated with an total or hemiarthroplasty using a Exeter stem for a displaced femoral neck fracture<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Periprosthetic femoral fractures | The incidence of postoperative periprosthetic femoral fractures are compared between the two groups studied (patients treated with Exeter stem or Lubinus SP2 stem. The hypothesis that the type of stem affects the incidence of periprosthetic femoral fractures are studied. The comparison will be analysed using cox proportional hazards or poisson regression analysis. | 2006-2014 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Riskfactors for periprosthetic fractures | Sex (male or female), age (years), ASA class (1-2 or 3-4), Exeter stem size (0-2, 3-4, 5-6) and surgical approach (direct lateral or posterolateral) type of stem used (Lubinus Sp2 or Exeter stem) | 2006-2014 |