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Does Femoral Retroversion Adversely Affect Outcomes After Hip Arthroscopy for Femoroacetabular Impingement Syndrome? A Midterm Analysis

Published:October 16, 2019DOI:https://doi.org/10.1016/j.arthro.2019.03.046

      Purpose

      To report 5-year outcomes of arthroscopic treatment of femoroacetabular impingement syndrome in patients with femoral retroversion compared with a control group of patients with normal femoral anteversion.

      Methods

      Data were prospectively collected and retrospectively reviewed for all patients who underwent hip arthroscopy between August 2008 and April 2013. Patients were included in analysis if they underwent hip arthroscopy during this period and had femoral version ≤0° calculated using magnetic resonance imaging. Exclusion criteria included prior ipsilateral hip conditions/surgeries or Tönnis grade >1. These patients were pair matched with patients having femoral anteversion between 10° and 20° based on gender, body mass index ± 10, and age ± 10 years. Patient-reported outcomes (PROs) were collected at 3 months and 1 year postoperatively and annually thereafter. An a priori power analysis was performed.

      Results

      A total of 59 patients were identified as the experimental group out of 69 eligible for inclusion (86%). All 59 patients were matched, with a mean age of 37.4 years and mean body mass index of 26.9. Twenty patients were female, and 39 were male. These patients demonstrated significant improvement from their preoperative state in all patient-reported outcomes and visual analog score scores (P < .001). Thirty-eight patients met the threshold for minimal clinically important difference, and 35 achieved patient acceptable symptomatic state for the modified Harris Hip Score questionnaire. Seven patients converted to total hip replacement. No differences were noted between retroverted and control patients in any of the outcome measures collected, in pain or satisfaction ratings, in the frequency of or duration to secondary surgeries or in complication rate (P > .05).

      Conclusions

      Patients with femoral retroversion demonstrated significantly higher outcomes at minimum 5-year follow-up after undergoing arthroscopic hip surgery. These outcomes were not different from those of patients with normal femoral version. While femoral retroversion should not be considered a contraindication to hip arthroscopy, it should be carefully considered as a factor in patient selection and surgical planning.

      Level of Evidence

      Level III, retrospective comparative study.
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      Linked Article

      • Editorial Commentary: Myth Buster—Is Femoral Retroversion a Contraindication to Hip Arthroscopy in Femoroacetabular Impingement?
        ArthroscopyVol. 35Issue 11
        • Preview
          Hip arthroscopy can effectively address cam and pincer impingement by reshaping bone prominences or bone edges. However, hip arthroscopy cannot be used to correct severe bone torsion abnormalities such as acetabular or femoral retroversion. As a result, some surgeons contraindicate hip arthroscopy in patients with femoral retroversion absent correction of the torsion abnormalities. However, recent research has suggested that hip arthroscopy absent osteotomy, with a focus on labral preservation and thorough correction of underlying cam and pincer bony abnormalities, achieves positive outcomes.
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