title: Does Bony Regrowth Occur After Arthroscopic Femoroplasty in a Group of Young Adolescents?
abstract: OBJECTIVE
  To evaluate femoral head-neck bone regrowth and PROs in skeletally immature patients that underwent arthroscopic femoroplasties over a minimum 2-year period.
  
  
  METHODS
  Eleven skeletally immature hips (10 patients) with open femoral head physes underwent femoroplasty between October 2008 and November 2013. Inclusion criteria were minimum 2-year follow-up with patient-reported outcomes (PROs) and radiographs preoperatively, at 2 weeks, and at a minimum of 2 years postoperatively. Exclusion criteria were >16 years of age, preoperative Tönnis grade >1 and previous hip conditions. Preoperative radiographs were used to assess skeletal immaturity, which was indicated by a Risser score ≤4 and femoral head physis >1 mm. Alpha angles were measured preoperatively, at 2 weeks, and at a minimum of 2 years postoperatively. PROs, including the modified Harris Hip Score (mHHS), Non-Arthritic Hip Score (NAHS), Hip Outcome Score-Sports Specific Subscale (HOS-SSS), and visual analog scale (VAS) score, were measured preoperatively and at the latest follow-up.
  
  
  RESULTS
  Mean age at surgery was 14.7 years (range: 13.2-15.9). Mean follow-up was 35.7 months (range: 23.3-61.4). All hips tested positive for anterior impingement preoperatively. The mean preoperative alpha angle was 61.8°, which decreased to 41.5° postoperatively (P < .0001) and was 40.7° at a minimum of 2 years postoperatively. No bony regrowth was documented at the latest follow-up. Mean improvements in scores were as follows: mHHS = 58.5 to 79.8 (P < .0001), NAHS = 56.8 to 87.1 (P = .008), HOS-SSS = 34.3 to 78.3 (P = .004), and VAS score = 7.5 to 1.3 (P < .0001). Mean patient satisfaction was 8.7 ± 1.7. One hip (9.0%) required revision arthroscopy at 31.1 months. No postoperative complications were reported.
  
  
  CONCLUSIONS
  Bony regrowth of the femoral head-neck region did not occur in this study of skeletally immature females who underwent arthroscopic femoroplasty. In this group of patients, hip arthroscopic treatment of FAI and labral tears is a safe and favorable intervention because of its high patient satisfaction and outcome scores and absence of postoperative complications.
  
  
  METHODS
  Level IV, prognostic study.
authors.affiliation: Hinsdale Orthopaedics, American Hip Institute, Westmont, Illinois, U.S.A.
authors.forename: Itay
authors.initials: I
authors.lastname: Perets
authors.affiliation: Hinsdale Orthopaedics, American Hip Institute, Westmont, Illinois, U.S.A.
authors.forename: Asheesh
authors.initials: A
authors.lastname: Gupta
authors.affiliation: Hinsdale Orthopaedics, American Hip Institute, Westmont, Illinois, U.S.A.
authors.forename: Edwin O
authors.initials: EO
authors.lastname: Chaharbakhshi
authors.affiliation: Hinsdale Orthopaedics, American Hip Institute, Westmont, Illinois, U.S.A.
authors.forename: Lyall
authors.initials: L
authors.lastname: Ashberg
authors.affiliation: Hinsdale Orthopaedics, American Hip Institute, Westmont, Illinois, U.S.A.
authors.forename: David E
authors.initials: DE
authors.lastname: Hartigan
authors.affiliation: Hinsdale Orthopaedics, American Hip Institute, Westmont, Illinois, U.S.A.
authors.forename: Mary R
authors.initials: MR
authors.lastname: Close
authors.affiliation: Hinsdale Orthopaedics, American Hip Institute, Westmont, Illinois, U.S.A.. Electronic address: DrDomb@americanhipinstitute.org.
authors.forename: Benjamin G
authors.initials: BG
authors.lastname: Domb
mesh_terms: D000293:Adolescent; D001182:Arthroscopy; D005260:Female; D005270:Femur Head / Q000000981:diagnostic imaging / Q000601:surgery*; D005500:Follow-Up Studies; D017102:Fracture Healing; D006621:Hip Joint / Q000000981:diagnostic imaging / Q000601:surgery*; D006801:Humans; D017060:Patient Satisfaction; D011183:Postoperative Complications / Q000000981:diagnostic imaging; D013177:Sports; D016896:Treatment Outcome