Effectiveness of shorter femoral stems for hip replacement surgery, testing the biomechanics, using computer simulations, and comparing clinical outcomes between two types of short stems: one with a collar and one without

Not Applicable

Conditions: Total hip arthroplasty for hip osteoarthritis
Surgery

Registration Number: ISRCTN12375281

Lead Sponsor: General University Hospital of Patras

Brief Summary: Not available

Detailed Description: Not available

Recruitment & Eligibility

Status: Ongoing

Sex: All

Target Recruitment: 160

Inclusion Criteria

1. Age 50 - 80 years old
2. Primary hip osteoarthritis
3. Inflammatory hip arthritis
4. Hip avascular necrosis
5. Post-traumatic arthritis

Exclusion Criteria

1. Inability to participate
2. Hip anatomy that inhibits short stem fitting (Dorr C etc)
3. Active or recent infection
4. BMI >45 kg/m²
5. History of hip surgery
6. Commorbidities that would influence the final outcome (e.g. ankylosing spondylitis, neuromuscular diseases)

Study & Design

Study Type: Interventional

Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
1. Patient-reported outcomes reported preoperatively and at 3, 6, 12 and 24 months using:<br>1.1. Hip pain and function measured using Forgoten Joint Score 12 (FJS-12)<br>1.2. Hip pain and function measured using Hip Disability and Osteoarthritis Outcome Score (HOOS)<br>1.3. Hip pain and function measured using Harris Hip Score (HHS)<br>1.4. Pain measured using Visual Analogue Scale (VAS) <br>2. Quality of life measured using Western Ontario and McMaster Universities Arthritis Index (WOMAC) and 12-Item Short Form Health Survey (SF-12) preoperatively and at 3, 6, 12 and 24 months<br>3. Stem subsidence measured using anteroposterior pelvis x-ray at 1, 3, 6 and 12 months

Secondary Outcome Measures

Name	Time	Method
1. Gait analysis using VICON 2.4 preoperatively and at 1 and 6 months postoperatively<br>2. Handgrip strength measured using a Jamar Hydraulic Hand Dynamometer at 3 max repetitions and capturing the best effort preoperatively