title: Follow-up computed tomography arthrographic evaluation of bony Bankart lesions after arthroscopic repair.
abstract: OBJECTIVE
  The follow-up results of bony union after an arthroscopic bony Bankart repair have not been reported. We studied follow-up computed tomography (CT) arthrograms to evaluate radiographic healing of bony Bankart fragments.
  
  
  METHODS
  Among 41 patients who underwent arthroscopy for a bony Bankart lesion between July 2006 and May 2009, 31 cases in 30 patients who had undergone sequential follow-up CT arthrography preoperatively, at 3 months postoperatively, and at 1 year postoperatively were enrolled. Radiologic patterns of fracture healing were classified into bony healing and fibrous healing. The mean age was 23.4 years, and the mean follow-up was 30.5 months. The mean interval from the first trauma to surgery was 32.5 months, and the mean preoperative dislocation number was 12.1.
  
  
  RESULTS
  The mean preoperative glenoid defect was 14.1%. The fracture healing patterns included 26 bony and 5 fibrous unions. There was a significant positive relation between the total dislocation number and the preoperative glenoid defect (P = .003). The proportion of the mean fragment dimension to a circle drawn through the outer cortex of the inferior glenoid was 8.4% preoperatively, 6.6% at 3 months postoperatively, and 6.2% at 1 year postoperatively. The fragment size decreased from that measured preoperatively to the size measured 3 months after surgery (P < .05). However, the fragment size was maintained between 3 months and 1 year postoperatively (P > .05). The mean Rowe score at 1 year postoperatively was 97.2.
  
  
  CONCLUSIONS
  Follow-up CT arthrographic evaluation showed that small bony Bankart fragments survived without resorption until 1 year postoperatively, even with fibrous union, and that reattached bone fragment fixation to the anatomic position with the labrum could survive.
  
  
  METHODS
  Level IV, therapeutic case series.
authors.affiliation: Department of Orthopaedic Surgery, Konkuk University School of Medicine, Seoul, South Korea.
authors.forename: Jin-Young
authors.initials: JY
authors.lastname: Park
authors.forename: Seung-Jun
authors.initials: SJ
authors.lastname: Lee
authors.forename: Sang-Hoon
authors.initials: SH
authors.lastname: Lhee
authors.forename: Suk-Ha
authors.initials: SH
authors.lastname: Lee
mesh_terms: D000293:Adolescent; D000328:Adult; D001182:Arthroscopy / Q000534:rehabilitation; D005260:Female; D005500:Follow-Up Studies; D017102:Fracture Healing; D061165:Glenoid Cavity / Q000000981:diagnostic imaging / Q000293:injuries* / Q000601:surgery; D006801:Humans; D008297:Male; D008875:Middle Aged; D061330:Multidetector Computed Tomography; D012189:Retrospective Studies; D012783:Shoulder Dislocation / Q000150:complications*; D012784:Shoulder Fractures / Q000000981:diagnostic imaging / Q000209:etiology / Q000534:rehabilitation / Q000601:surgery*; D016896:Treatment Outcome; D055815:Young Adult