title: Arthroscopic Bioabsorbable Screw Fixation of Unstable Osteochondritis Dissecans in Adolescents: Clinical Results, Magnetic Resonance Imaging, and Second-Look Arthroscopic Findings.
abstract: BACKGROUND
  This study aimed to evaluate the clinical and radiological outcomes of arthroscopic bioabsorbable screw fixation in osteochondritis dissecans (OCD) in adolescent patients with unstable lesions causing pain.
  
  
  METHODS
  The study included 11 patients (10 males and 1 female) with OCD who underwent arthroscopic bioabsorbable screw fixation between July 2007 and February 2014 and were available for follow-up for more than 12 months. The mean age at diagnosis was 16.3 years (range, 11 to 19 years), and the average follow-up period was 51 months (range, 12 to 91 months). Clinical results were evaluated using the Knee Injury and Osteoarthritis Outcome Score (KOOS), Lysholm knee score, and International Knee Documentation Committee (IKDC) score measured before surgery and at follow-up. Functional evaluation was made using the Tegner activity scale. Magnetic resonance imaging (MRI) and second-look arthroscopy were performed at the 12-month follow-up.
  
  
  RESULTS
  Between the preoperative assessment and follow-up, improvements were seen in the KOOS (range, 44.9 to 88.1), Lysholm knee score (range, 32.6 to 82.8), and IKDC score (range, 40.8 to 85.6). The Tegner activity scale also improved from 2.8 to 6.1. Based on postoperative MRI, there were eight Dipaola grade I cases and three grade II cases. No complications due to fixation failure developed in any case. Second-look arthroscopy at 12 months postoperatively revealed that the lesion was covered with cartilage in all cases.
  
  
  CONCLUSIONS
  For unstable OCD lesions causing pain in adolescents, arthroscopic bioabsorbable screw fixation provided favorable outcomes with reduced pain and restoration of movement. Therefore, it should be considered as an effective treatment for OCD.
authors.affiliation: Department of Orthopedic Surgery, Pohang Naval Hospital, Pohang, Korea.
authors.forename: Keun Churl
authors.initials: KC
authors.lastname: Chun
authors.affiliation: Department of Orthopaedic Surgery, Wonkwang University Hospital, Wonkwang University School of Medicine, Iksan, Korea.
authors.forename: Kwang Mee
authors.initials: KM
authors.lastname: Kim
authors.affiliation: Department of Orthopaedic Surgery, Wonkwang University Hospital, Wonkwang University School of Medicine, Iksan, Korea.
authors.forename: Ki Joon
authors.initials: KJ
authors.lastname: Jeong
authors.affiliation: Department of Orthopaedic Surgery, Wonkwang University Hospital, Wonkwang University School of Medicine, Iksan, Korea.
authors.forename: Yong Chan
authors.initials: YC
authors.lastname: Lee
authors.affiliation: Department of Orthopaedic Surgery, Wonkwang University Hospital, Wonkwang University School of Medicine, Iksan, Korea.; Institutue of Wonkwang Medical Science, Iksan, Korea.
authors.forename: Jeong Woo
authors.initials: JW
authors.lastname: Kim
authors.affiliation: Department of Orthopaedic Surgery, Wonkwang University Hospital, Wonkwang University School of Medicine, Iksan, Korea.; Institutue of Wonkwang Medical Science, Iksan, Korea.
authors.forename: Churl Hong
authors.initials: CH
authors.lastname: Chun
mesh_terms: D020341:Absorbable Implants; D000293:Adolescent; D000328:Adult; D001182:Arthroscopy / Q000009:adverse effects / Q000295:instrumentation* / Q000379:methods; D001863:Bone Screws; D002648:Child; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D010008:Osteochondritis Dissecans / Q000000981:diagnostic imaging* / Q000601:surgery*; D016059:Range of Motion, Articular; D016896:Treatment Outcome; D055815:Young Adult
keywords: Bioabsorbable implant; Knee; Osteochondritis dissecans