Varus Stem Positioning Does Not Affect Long-term Functional Outcome in Cementless Anatomical Total Hip Arthroplasty.
Trial Snapshot
- Phase
- Not Applicable
- Status
- Completed
- Sponsor
- Enrollment
- 283
- Locations
- 1
- Primary Endpoint
- Long-term survival of THA with varus or neutral cementless fixation of a proximal HA-coated anatomic tapered femoral stem.
Study Overview
Brief Summary
Varus positioning is the most common femoral malposition in total hip arthroplasty (THA). The aim of this study was to compare the long-term results of an anatomical cementless femoral stem positioned in varus with those in neutral alignment.
Detailed Description
Data were prospectively collected and retrospectively reviewed for all patients who received a cementless anatomical femoral stem in THA between 1998 and 2008. After exclusion criteria applied, 127 stems had an varus axis deviated by more than 3 degrees (varus group) and 156 had an alignment between 0 and 2.9° from the femoral axis (neutral group). Survivorship rates, complications, clinical scores, thigh pain, radiological score, cortical hypertrophy and filling rate were analyzed. Mean follow-up was 10 years.
Study Design
- Study Type
- Observational
- Observational Model
- Case Control
- Time Perspective
- Retrospective
Eligibility Criteria
- Ages
- 18 Years to — (Adult, Older Adult)
- Sex
- All
- Accepts Healthy Volunteers
- No
Inclusion Criteria
- •All patients received by several senior surgeons, the same standardized posterolateral total hip arthroplasty, and the same rehabilitation protocol.
Exclusion Criteria
- •Etiologies other than osteoarthritis (osteonecrosis, fracture, dysplasia, rheumatoïd arthritis),
- •Complex cases with additional procedure,
- •Dual-taper modular or cemented stem,
- •Incomplete preoperative data or less than one-year postoperative data.
Outcomes
Primary Outcomes
Long-term survival of THA with varus or neutral cementless fixation of a proximal HA-coated anatomic tapered femoral stem.
Time Frame: Survival evaluation was carried out through study completion at an average of 10 years by the surgeon.
Kaplan-Meier survivorships free of revision of the femoral component for any reason, femoral fracture and revision of femoral component for fracture were calculated and compared by log-rank test for both group.
Secondary Outcomes
- Long-term clinical outcomes with varus or neutral femoral stem.(Clinical evaluation was carried out through study completion at an average of 10 years by the surgeon.)
- Long-term radiological outcomes with varus or neutral femoral stem.(Radiological evaluation was carried out through study completion at an average of 10 years by the surgeon.)