Comparison of the accuracy for cup orientation in total hip arthroplasty

JRCT ID: jRCT1062210084

Registered date:10/03/2022

Basic Information

• Recruitment status: Recruiting
• Health condition(s) or Problem(s) studied: Osteoarthrosis, osteonecrosis of the femoral head, rheumatoid arthritis, femoral neck fracture
• Date of first enrollment: 06/02/2024
• Target sample size: 50
• Study type: Interventional
• Intervention(s): Use of navigation system or alignment guide in total hip arthroplasty

Outcome(s)

• Primary Outcome: Measurement of cup angle (inclination and anteversion) to evaluate acetabular component accuracy in total hip arthroplasty.
• Secondary Outcome: Complications, Surgery time, Bleeding, Clinical evaluation score

Key inclusion & exclusion criteria

• Age minimum: >= 20age old
• Age maximum: Not applicable
• Gender: Both

Include criteria

1) Patients with osteoarthritis of the hip and rheumatoid arthritis with narrowing of the joint space by plain X-ray, patients with osteonecrosis of the femoral head with collapse of the femoral head by plain X-ray, and femoral neck fracture patient.
2) Patients with femoral head deviation less than 50% of femoral head diameter on plain X-ray (Crowe classification I, II)
3) Patients with hip joint range of motion of 90 degrees or more in flexion and 20 degrees or more in abduction
4) Patients aged 20 years or older at the time of consent acquisition
5) Patients who received sufficient explanation before participating in this study, and obtained the patient's free will to consent to the document after sufficient understanding.

Exclude criteria

1) Patients with severe iliac deformity due to pelvic fracture, pelvic surgery, etc.
2) Women who are pregnant or may become pregnant
3) Lactating women
4) Patients who are judged by the principal investigator and the research coordinator to be inappropriate as research subjects

Related Information

• Primary Sponsor: Tetsunaga Tomonori