title: Radiographic analysis of anatomic risk factors for scapholunate dissociation.
abstract: The aim of this study was to identify anatomic risk factors for scapholunate dissociation. On a PA view of the wrist, in zero position, the scaphoid and lunate diameter and height, lunate tilting angle, lunate uncovering index, lunate fossa inclination, radial inclination and ulnar variance were measured; on a lateral view the scapholunate angle and palmar tilting angle were measured. In a control group (N = 126) first left to right were compared which showed low correlations for radial inclination (r = 0.26), palmar tilt (r = 0.60) and ulnar variance (r = 0.68). These parameters were then measured on the affected hand in the study group, since they are not influenced by the dissociation, and no arthritic changes were seen. A statistically significant difference was found for a low lunate fossa inclination (p = 0.0001) and a low radial inclination (p = 0.0002). These factors may predispose to scapholunate dissociation.
authors.affiliation: University Hospital Pellenberg, Heilig Hart Kliniek, Leuven, Belgium.
authors.forename: Emmanuel
authors.initials: E
authors.lastname: Thienpont
authors.forename: Thomas
authors.initials: T
authors.lastname: Mulier
authors.forename: Luc
authors.initials: L
authors.lastname: De Smet
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D007593:Joint Instability / Q000000981:diagnostic imaging* / Q000473:pathology; D012667:Lunate Bone / Q000000981:diagnostic imaging* / Q000473:pathology; D008297:Male; D011859:Radiography; D012307:Risk Factors; D021361:Scaphoid Bone / Q000000981:diagnostic imaging* / Q000473:pathology; D014955:Wrist Joint / Q000000981:diagnostic imaging*