Does the Femoral Head Size Can Predict the Cup Size?

Study Overview
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Brief Summary
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This study had four aims: To evaluate the correlation between the planned preoperative cup size and the actual cup size that was implanted in surgery. To examine the absolute difference between the implanted cup size diameter and the actual femoral head size diameter. To examine the absolute difference between the planned cup size diameter and the actual femoral head size diameter To suggest an additional online monitoring tool on the accuracy of the preoperative process and implant selection. We hypothesized that high accuracy rates will be found between the preoperative planned cup size and the actual implanted cup size. Furthermore, we hypothesized that strong correlations will be found between the planned and actual implanted cup size and the actual femoral head diameter size.

Detailed Description
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Methods This is a retrospective study , that will include patients who underwent primary cementless THA due to end-stage hip osteoarthritis during 2011 and 2013 . Inclusion criteria were: Patients that underwent primary THA due to end-stage primary osteoarthritis; Males and females between 15-90 years of age. Data collection The following data will be collected: patients' characteristic including gender, age at surgery and side of surgery; implant information including cup model, planed cup size, actual cup size, shell type and outer diameter size (mm); actual femoral head diameter size (mm); the difference between the planned cup size and the actual cup size that was used; the difference between the actual femoral head diameter size measured at the end of surgery and the cementless implanted cup outer diameter size; the difference between the actual femoral head diameter size and the planed cup size..

Official Title
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Does the Femoral Head Size Can Predict the Cup Size? Retrospective Study.

Conditions
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Total Hip Arthroplasty

Intervention / Treatment
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* Other: There are no specific Intervention


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patients that underwent primary Total hip arthroplasty due to end-stage primary osteoarthritis; Exclusion Criteria: Significant distortion in the femoral head. Previous reconstructive surgery - radial osteotomy and hip socket.

Ages Eligible for Study
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Minimum Age: 15 Years
Maximum Age: 90 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 |
| --- | --- |
| Total hip arthroplasty<br> | Other: There are no specific Intervention<br>* are no specific Intervention<br>* Other names: are no specific Intervention;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| To evaluate the correlation between the planned preoperative cup size and the actual cup size that was implanted in surgery. |  | up to one year | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| To examine the absolute difference between the implanted cup size diameter and the actual femoral head size diameter. |  | up to one year | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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femoral head size, cup size, Total hip arthroplasty