title: In vitro comparison of proximal ulnar osteotomy and distal ulnar osteotomy with release of the interosseous ligament in a canine model.
abstract: OBJECTIVE
  To determine the effect of proximal ulnar osteotomy (PUO), distal ulnar osteotomy (DUO), and DUO with release of the interosseous ligament (DOLR) on displacement of the proximal ulna at the radioulnar joint.
  
  
  METHODS
  Experimental mechanical study.
  
  
  METHODS
  Cadaveric, skeletally mature canine thoracic limb pairs (n=11).
  
  
  METHODS
  Thoracic limbs disarticulated at the elbow were randomly assigned to 1 of 2 groups: (A) limbs were tested with no treatment (NOTX), then with PUO; (B) limbs were tested with DUO followed by DOLR. A distraction force was applied to the proximal ulna with the distal limb secured in a frame, and displacement of the proximal ulnar segment at the radioulnar joint was recorded.
  
  
  RESULTS
  Mean displacement was 0.36 mm (95% confidence interval [CI]: 0-1.12 mm) in the NOTX group, 4.68 mm (95% CI: 3.82-5.55 mm) for PUO limbs, 0.95 mm (95% CI: 0.52-1.39 mm) for the DUO group, and 4.36 mm (95% CI: 3.71-5.02 mm) for the DOLR group. Mean ulnar displacement of the DOLR group was significantly different compared with the DUO group, but there was no significant difference between the PUO and DOLR groups.
  
  
  CONCLUSIONS
  No significant difference was observed in displacement of the proximal ulnar segment after DOLR compared with PUO.
authors.affiliation: Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Washington State University, Pullman, WA 99164, USA. presmight@gmail.com
authors.forename: Kelly R
authors.initials: KR
authors.lastname: Might
authors.forename: Kimberly A
authors.initials: KA
authors.lastname: Hanzlik
authors.forename: Joseph Brad
authors.initials: JB
authors.lastname: Case
authors.forename: Colleen G
authors.initials: CG
authors.lastname: Duncan
authors.forename: Erick L
authors.initials: EL
authors.lastname: Egger
authors.forename: Matthew B
authors.initials: MB
authors.lastname: Rooney
authors.forename: Felix M
authors.initials: FM
authors.lastname: Duerr
mesh_terms: D000818:Animals; D001696:Biomechanical Phenomena; D002102:Cadaver; D004285:Dogs / Q000601:surgery*; D005552:Forelimb / Q000601:surgery*; D008022:Ligaments / Q000601:surgery*; D010027:Osteotomy / Q000379:methods / Q000662:veterinary*