title: Effect of wrist and interphalangeal thumb movement on zone T2 flexor pollicis longus tendon tension in a human cadaver model.
abstract: BACKGROUND
  Therapy after flexor pollicis longus (FPL) repair typically mimics finger flexor management, but this ignores anatomic and biomechanical features unique to the FPL.
  
  
  OBJECTIVE
  We measured FPL tendon tension in zone T2 to identify biomechanically appropriate exercises for mobilizing the FPL.
  
  
  METHODS
  Eight human cadaver hands were studied to identify motions that generated enough force to achieve FPL movement without exceeding hypothetical suture strength.
  
  
  RESULTS
  With the carpometacarpal and metacarpophalangeal joints blocked, appropriate forces were produced for both passive interphalangeal (IP) motion with 30° wrist extension and simulated active IP flexion from 0° to 35° with the wrist in the neutral position.
  
  
  CONCLUSIONS
  This work provides a biomechanical basis for safely and effectively mobilizing the zone T2 FPL tendon.
  
  
  CONCLUSIONS
  Our cadaver study suggests that it is safe and effective to perform early passive and active exercise to an isolated IP joint.
  
  
  METHODS
  NA.
authors.affiliation: Tendon and Soft Tissue Biology Laboratory and the Biomechanics Laboratory, Mayo Clinic, Rochester, MN, USA.
authors.forename: Patricia O
authors.initials: PO
authors.lastname: Rappaport
authors.affiliation: Tendon and Soft Tissue Biology Laboratory and the Biomechanics Laboratory, Mayo Clinic, Rochester, MN, USA.
authors.forename: Andrew R
authors.initials: AR
authors.lastname: Thoreson
authors.affiliation: Tendon and Soft Tissue Biology Laboratory and the Biomechanics Laboratory, Mayo Clinic, Rochester, MN, USA.
authors.forename: Tai-Hua
authors.initials: TH
authors.lastname: Yang
authors.affiliation: Tendon and Soft Tissue Biology Laboratory and the Biomechanics Laboratory, Mayo Clinic, Rochester, MN, USA.
authors.forename: Ramona L
authors.initials: RL
authors.lastname: Reisdorf
authors.affiliation: School of Public Health, University of California, Berkeley, Berkeley, CA, USA.
authors.forename: Stephen M
authors.initials: SM
authors.lastname: Rappaport
authors.affiliation: Tendon and Soft Tissue Biology Laboratory and the Biomechanics Laboratory, Mayo Clinic, Rochester, MN, USA.
authors.forename: Kai-Nan
authors.initials: KN
authors.lastname: An
authors.affiliation: Tendon and Soft Tissue Biology Laboratory and the Biomechanics Laboratory, Mayo Clinic, Rochester, MN, USA. Electronic address: pamadio@mayo.edu.
authors.forename: Peter C
authors.initials: PC
authors.lastname: Amadio
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001696:Biomechanical Phenomena / Q000502:physiology; D002102:Cadaver; D005384:Finger Joint / Q000502:physiology*; D006801:Humans; D008875:Middle Aged; D009068:Movement / Q000502:physiology*; D013710:Tendons / Q000502:physiology*; D013933:Thumb / Q000502:physiology*; D014955:Wrist Joint / Q000502:physiology*
keywords: Biomechanics; Cadaver; Flexor pollicis longus; Hand therapy; Human; Thumb