ArticleKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2019
Postoperative alpha angle not associated with patient-centered midterm outcomes following hip arthroscopy for FAI.
Article in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers, 2 of them syntheses that pooled it.
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Who cites it
21 citing papers in PubMed, 2 syntheses or guidelines pooled it.
- There is no definite consensus on the adequate radiographic correction in arthroscopic osteochondroplasty for femoroacetabular impingement: a systematic review and meta-analysis.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2021Pooled it
- Pooled it
- Combined Periacetabular Osteotomy and Hip Arthroscopy Results in High Return to Sport Rates in Contact and Noncontact Athletes With Hip Dysplasia.Orthopaedic journal of sports medicine · 2026Article
- Sacroiliac Joint Stress Is Affected by Postural Change or Cam Resection in Femoroacetabular Impingement Syndromes: A Finite Element Analysis Study.Orthopaedic journal of sports medicine · 2026Article
- Defining the postoperative alpha angle threshold for improved outcomes in posterolateral cam lesions.Hip international : the journal of clinical and experimental research on hip pathology and therapy · 2026Article
- Contemporary Techniques in Femoral Osteoplasty.Journal of the American Academy of Orthopaedic Surgeons. Global research & reviews · 2025Review
- Arthroscopic Management of Femoroacetabular Impingement: Current Concepts.Journal of clinical medicine · 2025Review
- Comparison of Knotless Versus Knot-Tying Suture Anchors for Arthroscopic Repair of Hip Labral Tears.Orthopaedic journal of sports medicine · 2024Article
- Postoperative alpha angle seems to be important for the achievement of clinical significance at a minimum 5-year follow-up after primary hip arthroscopy.Journal of hip preservation surgery · 2023Article
- Hip Preservation Surgery in Osteoarthritis Prevention: Potential Benefits of the Radiographic Angular Correction.Diagnostics (Basel, Switzerland) · 2022Article
- Changes in Hip Capsule Morphology after Arthroscopic Treatment for Femoroacetabular Impingement Syndrome with Periportal Capsulotomy are Correlated With Improvements in Patient-Reported Outcomes.Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association · 2022Article
- Evaluation of outcome reporting trends for femoroacetabular impingement syndrome- a systematic review.Journal of experimental orthopaedics · 2021Review
- Arthroscopic Correction of Sports-Related Femoroacetabular Impingement in Competitive Athletes: 2-Year Clinical Outcome and Predictors for Achieving Minimal Clinically Important Difference.Orthopaedic journal of sports medicine · 2021Article
- The Association of α Angle on Disease Severity in Adolescent Femoroacetabular Impingement.Journal of pediatric orthopedics · 2021Article
- Return to Sport After Hip Arthroscopy for Femoroacetabular Impingement Syndrome: a Comprehensive Review of Qualitative Considerations.Current reviews in musculoskeletal medicine · 2020Review
- Prospective Analysis of Arthroscopic Hip Anatomic Labral Repair Utilizing Knotless Suture Anchor Technology: The Controlled-Tension Anatomic Technique at Minimum 2-Year Follow-up.Orthopaedic journal of sports medicine · 2020Article
- Corrections in alpha angle following two different operative approaches for CAM-type femoral acetabular impingement - Ganz surgical hip dislocationWorld journal of orthopedics · 2020Article
- Moving forward in hip arthroscopy and related research.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2019Article
- Characteristics Associated With Physical Function Trajectories in Older Adults With Cancer During Chemotherapy.Journal of pain and symptom management · 2018Article
- Dynamic Hip Examination for Assessment of Impingement During Hip Arthroscopy.Arthroscopy techniques · 2016Article
Corrections and comments
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Authors and funding
4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeThe most commonly used parameter for defining cam-type femoroacetabular impingement(FAI) has been the alpha angle. The purpose of this study was to determine if patient-reported outcomes 5 years following hip arthroscopy for FAI were associated with postoperative alpha angle. We hypothesized that patient-reported outcomes would not be influenced by postoperative alpha angle in patients with FAI.
methods230 patients had primary hip arthroscopy for FAI and chondrolabral dysfunction. The median age was 40 years (range 18-69). All patients had preoperative and 1 day postoperative alpha angles recorded. At minimum 5 years following arthroscopy, all patients completed an online questionnaire that included the modified Harris Hip score(MHHS), WOMAC, HOS ADL, HOS Sport, SF12 and patient satisfaction. This study was IRB approved. Patients were grouped into two, based on their postoperative alpha angle: <55° (n = 158) and ≥ 55° (n = 56).
resultsThe median preoperative alpha angle was 72° (range 50°-105°) and the median postoperative alpha angle was 45° (range 30°-100°). The postoperative alpha angle did not correlate with any outcome measure. The median preoperative alpha angle in the < 55° group was 71° and in ≥ 55° group the median was 74° (p = 0.044). The median follow-up was 5.1 years (range 5-7). The median mHHS was 85 (range 47-100) in the < 55° and 85 (range 54-100) in the ≥ 55° group (n.s); WOMAC was 5 (range 0-73) in the < 55° and 4.5 (range 1-57) in the ≥ 55° group(n.s); HOS ADL was 95 (range 31-100) in the < 55° and 96 (range 50-100) in the ≥ 55° group (n.s); HOS Sport was 88 (range 0-100) in the < 55° and 88 (range 13-100) in the ≥ 55° group (n.s) Median patient satisfaction was 9 (range 1-10) in both groups.
conclusionThis study shows no statistically significant differences between the investigated patient-reported outcome scores at a 5 years postoperatively in relation to a correction of the alpha angle to 55°. While alpha angle has been shown to be an excellent preoperative diagnostic tool, the postoperative angle does not correlate with midterm outcomes or the development of osteoarthritis based on patient symptoms. The amount of osteoplasty should be based on dynamic examination at arthroscopy, and not by alpha angle. LEVEL OF EVIDENCE: III Case-control, retrospective comparative study.
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