title: Length changes of scapholunate interosseous ligament at different wrist positions: an in vivo 3-dimension image study.
abstract: OBJECTIVE
  The scapholunate interossous ligament (SLIL) has a critical role in maintaining the proper kinematic relationship between the scaphoid and the lunate. We hypothesize that the length of SLIL changes significantly at wrist full extension and during forearm rotation. The aim of this study was to investigate the length changes of SLIL at wrist full extension and forearm rotation in vivo.
  
  
  METHODS
  Twelve volunteers were randomly divided to two groups. We obtained computed tomography scans of the wrists at different wrist positions. The three regions of the SLIL were measured and analyzed with computer modeling.
  
  
  RESULTS
  The results showed that from the neutral to full extension of the wrist, the length of volar SLIL and volar, middle portions of the proximal SLIL increased significantly. The volar and proximal SLIL increased significantly in maximal forearm pronation.
  
  
  CONCLUSIONS
  The lengths of the volar and proximal regions of SLIL increase substantially at wrist full extension, but only slightly at maximal forearm pronation. Clinically, wrist full extension may make the SLIL ligament vulnerable to disruption.
authors.affiliation: Department of Hand Surgery, Hand Surgery Research Center, Affiliated Hospital of Nantong University, 20 West Temple Road, Nantong, 226001, Jiangsu, China, moshengren1013@163.com.
authors.forename: Jing
authors.initials: J
authors.lastname: Chen
authors.forename: Jun
authors.initials: J
authors.lastname: Tan
authors.forename: Jin Bo
authors.initials: JB
authors.lastname: Tang
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D050824:Carpal Joints / Q000000981:diagnostic imaging / Q000502:physiology; D005260:Female; D064368:Healthy Volunteers; D006801:Humans; D021621:Imaging, Three-Dimensional; D008023:Ligaments, Articular / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D012667:Lunate Bone / Q000000981:diagnostic imaging; D008297:Male; D015588:Observer Variation; D011403:Pronation / Q000502:physiology; D016059:Range of Motion, Articular / Q000502:physiology*; D021361:Scaphoid Bone / Q000000981:diagnostic imaging; D013484:Supination / Q000502:physiology; D014057:Tomography, X-Ray Computed / Q000379:methods; D014955:Wrist Joint / Q000000981:diagnostic imaging* / Q000502:physiology; D055815:Young Adult