Influence of Knee Alignment and Pelvis Rotation on Accuracy of Radiograph Measurements Before Total Knee Arthroplasty
- Conditions
- Knee Osteoarthritis
- Interventions
- Radiation: CT scan
- Registration Number
- NCT05277883
- Lead Sponsor
- Valdoltra Orthopedic Hospital
- Brief Summary
The aim of this study is to determine the accuracy of long leg standing X-rays with respect to coronal alignment of the knee.
- Detailed Description
Long leg standing x-ray is a routine examination to measure the femoral valgus angle before a total knee arthroplasty. Newer studies have shown that coronal leg alignment influences the rotation of the distal femoral part. This rotation might influence the measurements obtained with a long leg standing x-ray.
The primary purpose of this study is to determine whether there is a significant difference between 2D measurements taken on the x-ray and 3D measurements obtained with a CT scan.
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 112
Knee osteoarthritis scheduled for knee arthroplasty
- previous leg deformities or surgery that changes alignment
Study & Design
- Study Type
- OBSERVATIONAL
- Study Design
- Not specified
- Arm && Interventions
Group Intervention Description Group CT scan All patients scheduled for a total knee arthroplasty without any previous lower limb deformities or previous hip/knee surgery will be enrolled. A long leg standing x-ray and a CT scan of the lower limb will be obtained for every patient.
- Primary Outcome Measures
Name Time Method The angle difference between an x-ray and a CT scan Before surgery The femoral valgus angle, femoral mechanical angle, tibial mechanical angle and hip knee ankle angle are measured separately on the x-ray and on the CT scan. The difference in individual angle is the calculated.
- Secondary Outcome Measures
Name Time Method
Trial Locations
- Locations (1)
Orthopaedic Hospital Valdoltra
🇸🇮Ankaran, Slovenia