Digital Preop-planning of Total Hip Arthroplasties

Study Overview
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Brief Summary
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Residual leg length discrepancy is a common issue after total hip arthroplasty(THA). Digital preoperative planning may improve the accuracy of the surgical procedure and may help the surgeon to precisely predict implants sizes

Detailed Description
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Total hip arthroplasties (THAs) are used to restore locomotion. More than 150,000 THAs are performed each year in France. Better outcomes require a restoration of limb lengths and anatomy. Post-operative discrepancy is the main cause of complaints and financial compensation in the US after THA. As such, the investigators aim to use preoperative digital planning using TraumaCad to optimize the restoration of the center of rotation of the hips. Preoperative planning are usually performed using anteroposterior standard radiographs, which are scaled to an inaccurate scale. The TraumaCad system (Brainlab®) allows the adjustment of the scales to each patient and the virtual positioning of the implants in order to simulate the intervention for the restitution of the geometrical parameters of the hip.

Official Title
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Digital Preop-planning of Total Hip Arthroplasties in Orthopedic

Conditions
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Orthopedic Disorder

Intervention / Treatment
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* Device: evaluation of pre-op planning using Traumacad


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: being older than18 years, osteoarthritis as the indication for THA Exclusion Criteria: THAs after femoral neck fractures, revision surgery, major architectural anomaly (Bone tumor, prior fracture of the pelvis, hip dysplasia), patients under legal protection, pregnancy or breast-feeding

Ages Eligible for Study
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Minimum Age: 18 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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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Control group<br>Control group will be assessed by standard preop planning using implants templates. | Device: evaluation of pre-op planning using Traumacad<br>* The study will be compare pre-op planning with standard condition or with TraumaCad<br>|
| Active Comparator: TraumaCad Group<br>TraumaCad Group will be assessed by preop planning using Traumacad | Device: evaluation of pre-op planning using Traumacad<br>* The study will be compare pre-op planning with standard condition or with TraumaCad<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| postoperative residual discrepancy | The primary endpoint is the postoperative residual discrepancy measured on the radiographs on postop day 3 in millimeter compared using standard planning methods compared to TraumaCad. | day 3 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| comparisons of the reproducibility of the femoral implants sizes | Secondary endpoints is comparisons of the reproducibility of the femoral implants sizes predicted by the software | day 3 | 
| comparison of pelvis parameters | Secondary endpoints is the comparison of pelvis parameters in the 2 groups (offset, positioning of the implants) postoperatively. The angle of femur axis and the center of rotation of hip will be measure on the radiography of day 3 | day 3 | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Osteoarthritis, Hip, Total hip arthroplasty, leg discrepancy, preoperative planning