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  • Title: Editorial Commentary: Hip Arthroscopy for Femoroacetabular Impingement in Patients With Borderline Dysplasia Does Not Result in Inferior Outcomes Compared With Outcomes in Patients Without Dysplasia: Do Not Fear.
    Author: Hohmann E.
    Journal: Arthroscopy; 2022 May; 38(5):1516-1518. PubMed ID: 35501017.
    Abstract:
    The treatment of adult borderline hip dysplasia remains challenging and continues to be a subject of controversy. The preferred treatment for hip instability and acetabular undercoverage is periacetabular osteotomy. However, patients with painful hips and associated femoroacetebular impingement, microinstability, or no instability may benefit from arthroscopic surgery. Short-term studies have reported favorable clinical outcomes. Traditionally, the lateral center-edge angle was used to determine hip dysplasia. More recently the femoro-epiphyseal acetabular roof (FEAR) index was introduced as a measure for borderline dysplasia. In general, a FEAR index of less than 5° indicates hip instability. When using a FEAR index of more than 2° as a cut-off for hip instability and borderline dysplasia, arthroscopic hip surgery can achieve very similar clinical outcomes to patients with a FEAR index of less than 2°. However low and unequal sample sizes have potentially resulted in both type I and II errors, reducing internal study validity. Although this may be a step in the right direction, further high-quality studies are required to understand patients' characteristics on diagnosis, prognosis, outcomes of surgical interventions, and long-term disease progression for adult borderline hip dysplasia.
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