Objectives: Literature has supported the utilization of hip arthroscopy in adolescents, but limited study directly assesses whether outcomes in skeletally immature adolescents with open physes (OP) differs when compared to skeletally mature adolescents with closed physes (CP). Methods: Data was reviewed for patients who underwent hip arthroscopy between February 2009 and June 2021. Patients were excluded if they had previous ipsilateral hip conditions, hip dysplasia (LCEA 1, or were over the age of 19. Patients were included in the OP group if they had open proximal femoral growth plates, Risser stage ≤ 4, and complete minimum 2-year follow-up. OP hips were matched to CP hips in a 1:1 ratio by age, sex, and BMI. Statistical analysis was carried out to compare patient reported outcomes (PROs), clinically meaningful thresholds, secondary surgeries, and complications between the two groups. Results: Thirty OP hips were matched with 30 CP hips. The mean age of the OP group and control group was similar (OP 14.96 yr; CP 15.01 yr). Significant and similar improvement was seen for all PROs in both groups. The OP group had higher preoperative values for mHHS and HOS-SSS than the CP group, yet both groups achieved similar postoperative values for all evaluated PROs. The OP and CP groups met clinically meaningful thresholds and underwent revision arthroscopy at similar rates. No complications or bony regrowth was reported. Conclusions: Skeletally immature adolescents with open physes demonstrated favorable short to midterm outcomes after hip arthroscopy. When compared with CPs, OPs had similar PROs, rates of achieving clinical thresholds, and rates of revision hip arthroscopy Longitudinal radiographic analysis indicated no bony regrowth to occur in both groups.
McCarroll et al. (Fri,) studied this question.