Scan Hip Evaluation

Study Overview
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Brief Summary
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The couple of friction metal-polyethylene is regarded as the couple of reference in spite of the osteolysis induced by the wear of the polyethylene which remains the independent factor of long-term failure. This is all the more true as the patients are young, thus justifying the recourse to alternate couples of friction. The Metasul® couple was introduced on the French market under its current form in 1995 (year of its marking EC). The use of a couple of friction metal-metal (MM) is justified because it would be likely to improve longevity of the total arthroplasties of the active subjects by the reduction in osteolysis related to the wear of polyethylene. Various studies highlight evolutions different according to the types of fixing acetabular; favourable results of the not cemented cups contrasting with unsealings and the evolutionary edgings of the Metasul® cups cemented of or the cups of cemented Weber type.

Detailed Description
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Radiographies standards allow the follow-up of the total prostheses of hip but those underestimate the incidence and the extension of osteolyses perished-acetabular which are generally asymptomatic initially. The lack of international consensus on the definition of the parameters of interpretation of the radiological follow-up of the PTH makes difficult the comparison of the various results. The purpose of the study is to evaluate the presence of geodes acetabular and femoral with scan examination.

Official Title
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Scan Evaluation at 9 Years of the Bone Acetabular Supporting Cups Without Cement (Couple Metal/Metal in Diameter 28 mm)

Conditions
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Hip Arthroplasty

Intervention / Treatment
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* Device: Metal on metal hip arthroplasty operated on 2002


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Metal on metal hip arthroplasty operated on 2002 Age older than 40 years Exclusion Criteria: Expectant mothers
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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Design Details

Primary Purpose: Treatment
Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Intervention/Treatment |
| --- |
|Device: Metal on metal hip arthroplasty operated on 2002|The purpose of the study is to evaluate the presence of geodes acetabular and femoral with scan examination.|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Realization of a scan nine years after the surgery of total hip arthroplasty |  | after nine years | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Clinical results preoperative Postel Merle d'Aubigné, Harris score preoperative and SF12 scores preoperative (before the hip surgery) |  | after nine years | 
| Cooperating X-ray assessments and scan |  | after nine years | 
| Realization of a X-ray and a scan then comparison of the results obtained |  | after nine years | 
| Concentrations of cobalt: chrome and nickel in blood |  | after nine years | 
| Rate of survival of the prosthesis |  | after nine years | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Hip, Arthroplasty, Metal on metal, operated on 2002