title: [Extensor tenodesis to the retinaculum extensorum: anatomic and biomechanical study].
abstract: BACKGROUND
  The extensor tenodesis is a direct dynamic tenodesis which is activated by wrist flexion due either to hand weight or flexor carpi radialis. This tenodesis is usually performed to the distal radius, but it is possible to fix EDC (extensor digitorum communis) to the retinaculum extensorum.
  
  
  METHODS
  Biomechanical study concerned 12 anatomical subjects (24 wrists). The biometric and radiological analysis of retinaculum displacement distalwards was made under low (1 kg) and moderate (6 kg) pulling. Surgical clips were placed on the proximal and distal limits of the retinaculum in order to study their positions on roentgenograms.
  
  
  RESULTS
  Average width of the retinaculum was 19 mm. Average movement under 1 kg drive was 6 mm and 8.6 mm under 6 kg drive. X-rays showed that the proximal border of the retinaculum was always located proximally to the wrist rotate centre, whatever the traction.
  
  
  CONCLUSIONS
  We found the same anatomical features described by different authors, except for the width of the retinaculum. Our study suggests that the retinaculum is strong enough to support a surgical tenodesis.
authors.affiliation: Service de chirurgie plastique, hôpital Saint-Louis, 1, avenue Claude Vellefaux 75010 Paris, France. jean-philippe.binder@svp.ap-hop-paris.fr
authors.forename: J P
authors.initials: JP
authors.lastname: Binder
authors.forename: M
authors.initials: M
authors.lastname: Revol
authors.forename: A
authors.initials: A
authors.lastname: Cormerais
authors.forename: I
authors.initials: I
authors.lastname: Laffont
authors.forename: J P
authors.initials: JP
authors.lastname: Pedelucq
authors.forename: O
authors.initials: O
authors.lastname: Dizien
authors.forename: J M
authors.initials: JM
authors.lastname: Servant
mesh_terms: D001696:Biomechanical Phenomena; D002102:Cadaver; D006801:Humans; D009068:Movement; D013525:Surgical Instruments; D013710:Tendons / Q000033:anatomy & histology* / Q000502:physiology*; D014953:Wrist / Q000033:anatomy & histology* / Q000502:physiology*