Related Experiment Video
Updated: Aug 16, 2026
Treatment of Ankle Osteoarthritis with Total Ankle Replacement Through a Lateral Transfibular Approach
Published on: January 24, 2018
Clinical and radiographic analysis of the uncemented LSF total hip arthroplasty
1Department of Orthopaedic Surgery, US Naval Hospital, Oakland, California.
Insights
Uncemented porous-coated LSF total hip prostheses show excellent patient satisfaction and functional improvement. These hip implants demonstrate high stability and osseointegration, significantly reducing pain and medication needs.
Area of Science:
- Orthopedic Surgery
- Biomaterials Science
- Medical Imaging
Background:
- Total hip arthroplasty (THA) is a common procedure for hip osteoarthritis.
- Uncemented hip prostheses aim for biological fixation through osseointegration.
- Porous-coated implants are designed to promote bone ingrowth.
Purpose of the Study:
- To prospectively evaluate the clinical and radiographic outcomes of uncemented porous-coated LSF total hip prostheses.
- To assess patient satisfaction and functional improvement following THA with LSF implants.
- To determine the rate of osseointegration and component stability.
Main Methods:
- Prospective study of 49 LSF total hip prostheses in 41 patients.
- Clinical evaluation using Harris hip score preoperatively and annually postoperatively.
- Radiographic assessment for component stability and osseointegration.
- Patient satisfaction questionnaire and functional rating.
Main Results:
- Significant improvement in Harris hip scores from 38 preoperatively to 93 at follow-up.
- High patient satisfaction (100%) with increased function and decreased pain/medication.
- 86% of components showed signs of osseointegration; all components were radiographically stable.
- Low incidence of pain (4% at ≥2 years) and limp (2% moderate at ≥2 years).
Conclusions:
- Uncemented porous-coated LSF total hip prostheses provide excellent clinical outcomes, high patient satisfaction, and good long-term stability.
- The LSF implant design facilitates osseointegration and functional recovery in THA patients.
- These implants effectively restore function and alleviate pain, comparable to a normal hip.
Abstract:
Forty-nine consecutive uncemented porous-coated LSF total hip prostheses were implanted in 41 patients and studied prospectively. Clinical rating as described by Harris was performed preoperatively, at 6 months and 1 year postoperatively, and annually thereafter. Anteroposterior and lateral radiographs were obtained preoperatively, immediately postoperatively, at 6 and 12 months, and annually thereafter. At the most recent follow-up visit, patients were evaluated clinically and radiographically utilizing the format recently recommended by the Hip Society. A patient satisfaction questionnaire was also completed. The follow-up period averaged 37 months (range, 24-48 months). Preoperative hip scores averaged 38 (range, 18-68) and improved to 93 at the most recent follow-up visit (range, 76-100). The incidence of mild pain was 14% at 1 year and 4% at 2 years or more. The incidence of limp was 16% slight and 8% moderate at 1 year, and 12% slight and 2% moderate at 2 years or more. Surgical fit was objectively graded as excellent in 61%, good in 33%, and poor in 6%. The authors were unable to correlate surgical fit with clinical scores or radiographic findings. According to radiographic criteria, all components were judged to be stable and 86% were judged to demonstrate objective signs of osseointegration. Patient satisfaction with the procedure was 100%. All patients stated that the procedure increased their function and decreased their pain and need for medication. Compared to a normal hip, in terms of symptoms and function, the patients rated their postoperative hip at 85% (range, 50-100%). Compared to their level of activity before their hip was symptomatic, they rated their current activity level as 83% (range, 50-100%).
