Digital Sizing for Orthopaedic Hip Implants

Ottawa Hospital Research Institute

Status: Unknown

Conditions: Hip Arthritis

Study type: Observational

Funder types: Other

Identifiers

NCT00665210

2007-511

Details and patient eligibility

About

Hip implants come in different sizes. Currently, surgeons predict the implant size that will be needed using an analogue method whereby photos of the implant sizes are overlaid on the x-rays. In this study, we propose to use a digital, computerized method of templating which we expect will be more accurate than the overlay method.

Enrollment: 100 estimated patients

Sex: All

Volunteers: No Healthy Volunteers

Inclusion criteria

• Patients booked for primary total hip arthroplasty with non-cemented prosthesis.
• No previous surgery/fractures to acetabulum or femur or hip.
• No gross bony abnormality except for osteoarthritis and avascular necrosis.

Exclusion criteria

• Cancer or tumor suspected, morbid obesity, revision, previous acetabular/femur/hip surgery, gross bony deformity, calibration bar not completely pictured on radiograph, unsuccessful surgery fracture/cancer/cemented prosthesis used.