Evaluation of Orthopedic Knee Measurement Using Lunar iDXA

Study Overview
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Brief Summary
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This study is to compare scans of the knee performed using new software designed specifically to look at the knee joint with those performed using approved software designed for scans of the hip.

Official Title
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Evaluation of Orthopedic Knee Measurement Using Lunar iDXA

Conditions
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Hemi Knee Arthroplasty, Patello-femoral Osteoarthritis

Intervention / Treatment
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* Device: iDXA knee software


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Adult (>30 years) males and females. Have had a hemi knee replacement of one knee at least 8 weeks ago. Patello-femoral osteoarthritis is not a contraindication if person does not have symptoms from the patello-femoral joint. Able to provide informed consent. In good general health. Exclusion Criteria: Neuromuscular or vascular disease in the affected leg. Found to be unsuitable for hemi knee arthroplasty (KA) before or at surgery. Preoperative extensions defect greater than 15 degrees. Preoperative maximal flexion of less than 100 degrees. Symptomatic patello-femoral osteoarthritis. Insufficiency of anterior cruciate ligament (ACL) Fracture sequalae (Intraarticular fracture and all tibial condyle fractures). Previous osteotomy. Previous extensive knee surgery. Metabolic bone disease including osteoporosis with a T score of <-2.5. Rheumatoid arthritis. Postmenopausal women on systemic hormone replacement therapy (HRT). Long-term treatment with oral corticosteroids and/or bisphosphonates. Inability to consent (such as Alzheimer's Disease). Misuse of drugs or alcohol. Serious psychiatric disease. Disseminated malignant disease and treatment with radiotherapy or chemotherapy.

Ages Eligible for Study
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Minimum Age: 30 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: Diagnostic
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Post-operative knee replacement<br>Subjects that have had a hemi knee replacement of one knee at least 8 weeks ago had the post-operative knee scanned using the orthopedic hip application and the Lunar orthopedic knee application. | Device: iDXA knee software<br>* Following surgery, subjects who have undergone knee arthroplasty will have the knee that has undergone arthroplasty (post-operative) scanned at least 8 weeks after surgery. During one visit, each subject will have the post-operative knee scanned 1 time using Lunar orthopedic application, and 3 times with the subject repositioned between scans using the Lunar orthopedic knee application (total of 4 scans). Lunar iDXA measurement procedures will be done<br>* Other names: iDxa;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Efficacy of Lunar orthopedic knee software. | This study will compare the bone density and bone mass measurements acquired with Lunar orthopedic knee software and for the same scans acquired with Lunar orthopedic software. A determination of precision of bone measurements acquired and analyzed with Lunar orthopedic knee software. | 5 months from starting study. | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Patello femoral, osteoarthritis, arthroplasty