Digital Sizing for Orthopaedic Hip Implants
Digital Sizing for Orthopaedic Hip Implants
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.
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.