title: Three-dimensional volume measurement of coracoid graft osteolysis after arthroscopic Latarjet procedure.
abstract: OBJECTIVE
  The Latarjet procedure has been shown to be a reliable method to prevent recurrent anterior shoulder instability. Coracoid bone graft osteolysis is a potential catastrophic complication and can lead to recurrent instability. The purpose of our study is to present a novel quantitative method to measure the amount of coracoid bone osteolysis using 3-dimensional (3D) computed tomography (CT) scan imaging.
  
  
  METHODS
  This is a prospective study with 15 patients (16 shoulders) who underwent an arthroscopic Latarjet procedure. Three-dimensional CT scans were obtained at 6 weeks and 6 months. Using volumetric analysis, we quantified the amount of bone loss using our described method. Interobserver reliability and intraobserver reliability were calculated.
  
  
  RESULTS
  On the basis of our new volumetric analysis of the arthroscopic Latarjet procedure using 3D CT scans, we found that the superior half of the coracoid bone graft undergoes a significant amount of osteolysis at 6 months postoperatively. The interobserver reliability and intraobserver reliability were excellent.
  
  
  CONCLUSIONS
  This study presents a reproducible method to quantify and compare coracoid bone graft osteolysis after an arthroscopic Latarjet procedure. We also developed a description system that may be used for comparison studies. To our knowledge, this is the first method that quantifies the amount of coracoid bone graft osteolysis using more accurate 3D CT scanning.
  
  
  CONCLUSIONS
  The 3D analysis we propose is a valid method to measure the amount of coracoid bone graft osteolysis after an arthroscopic Latarjet procedure. Our description system may guide the surgeon regarding possible revision surgery when faced with significant osteolysis of the coracoid bone graft.
authors.affiliation: Alps Surgery Institute, Annecy, France. Electronic address: davhae@hotmail.com.
authors.forename: David L
authors.initials: DL
authors.lastname: Haeni
authors.affiliation: Alps Surgery Institute, Annecy, France.
authors.forename: Gaëtan
authors.initials: G
authors.lastname: Opsomer
authors.affiliation: Department of Orthopedic Surgery, Harvard-Boston Shoulder Institute, Boston, MA, USA.
authors.forename: Amit
authors.initials: A
authors.lastname: Sood
authors.affiliation: Alps Surgery Institute, Annecy, France.
authors.forename: Jeremy
authors.initials: J
authors.lastname: Munji
authors.affiliation: Alps Surgery Institute, Annecy, France.
authors.forename: Matthieu
authors.initials: M
authors.lastname: Sanchez
authors.affiliation: Alps Surgery Institute, Annecy, France.
authors.forename: Benoit
authors.initials: B
authors.lastname: Villain
authors.affiliation: Centre Orthopédique Santy, Hôpital Privé Jean Mermoz, Lyon, France.
authors.forename: Gilles
authors.initials: G
authors.lastname: Walch
authors.affiliation: Alps Surgery Institute, Annecy, France.
authors.forename: Laurent
authors.initials: L
authors.lastname: Lafosse
mesh_terms: D000328:Adult; D001182:Arthroscopy / Q000379:methods*; D000070597:Coracoid Process / Q000637:transplantation*; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional; D007593:Joint Instability / Q000601:surgery; D008297:Male; D008875:Middle Aged; D010014:Osteolysis / Q000000981:diagnostic imaging* / Q000209:etiology; D011446:Prospective Studies; D015203:Reproducibility of Results; D012785:Shoulder Joint / Q000000981:diagnostic imaging / Q000601:surgery*; D013709:Tendon Transfer; D014057:Tomography, X-Ray Computed; D055815:Young Adult
keywords: 3D volume; Latarjet; Shoulder; arthroscopy; coracoid graft; instability; osteolysis