Arthroscopic Management of Dysplastic Hip Morphologies: Predictors of Success and Failures and Comparison to an Arthroscopic FAI Cohort

Background:Reports regarding arthroscopy for mild hip dysplasia have conflicting results.Hypothesis:Arthroscopy for borderline/mild hip dysplasia would lead to improved outcomes but be inferior to arthroscopy for femoroacetabular impingement (FAI).Study Design:Cohort study; Level of evidence, 3.Methods:A total of 88 hips (77 patients, 71% female; mean age, 33.9 years) with dysplastic radiographic findings were retrospectively reviewed at a mean follow-up of 26.0 months after hip arthroscopy. Specific procedures included labral repair (76%), labral debridement (23%), capsular repair/plication (82%), and femoral osteochondroplasty (72%). Radiographic parameters included lateral center-edge angle, neck-shaft angle, Tonnis angle, extrusion index, femoral head lateralization, and break in the Shenton line. Pre- and postoperative function were evaluated prospectively with the modified Harris Hip Score (mHHS), 12-Item Short Form Health Survey, and visual analog scale for pain. The results of the dysplastic cohor...