Document Detail


Ex vivo Contact Mechanics and Three-Dimensional Alignment of Normal Dog Elbows after Proximal Ulnar Rotational Osteotomy.
MedLine Citation:
PMID:  23198918     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
OBJECTIVE: To evaluate the effect of proximal ulnar rotational osteotomy (PURO) on the contact mechanics and 3-dimensional (3D) alignment of cadaveric normal dog elbows.
STUDY DESIGN: Ex vivo biomechanical study.
ANIMALS: Unpaired thoracic limbs from 12 dogs (mean ± SD weight, 26 ± 4 kg).
METHODS: PURO consisted of a transverse osteotomy with 30° external rotation of the proximal segment. With the limb under 200 N axial load, contact area (CA), mean contact pressure (CP) and peak contact pressure (PCP) were measured using digital pressure sensors in the medial and lateral compartments and 3D static elbow poses were obtained, before and after PURO. Each specimen was tested at 115°, 135°, and 155° elbow flexion, with the antebrachium in neutral rotation, in 28° supination, and in 16° pronation. Repeated measures ANOVAs with post-hoc Bonferroni (P ≤ .05) were performed.
RESULTS: PURO caused significant changes, mostly at 135° elbow flexion and neutral antebrachial rotation, characterized by decreased CP (10%) and PCP (10%) in the medial compartment, and increased CP (27%) and PCP (23%) in the lateral compartment. The apex of the medial coronoid process translated 3.4 mm caudally, 1.7 mm abaxially, and rotated 1.8° externally relative to the radial head. Humeroradial varus angulation reduced by 6.7°.
CONCLUSIONS: In limited poses, PURO displaces the medial coronoid process caudally and abaxially and shifts contact pressures towards the lateral elbow compartment by decreasing varus angulation.
Authors:
Laura C Cuddy; Daniel D Lewis; Stanley E Kim; Bryan P Conrad; Scott A Banks; Marybeth Horodyski; Noel Fitzpatrick; Antonio Pozzi
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Veterinary surgery : VS     Volume:  41     ISSN:  1532-950X     ISO Abbreviation:  Vet Surg     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-12-03     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8113214     Medline TA:  Vet Surg     Country:  United States    
Other Details:
Languages:  eng     Pagination:  905-14     Citation Subset:  IM    
Copyright Information:
© Copyright 2012 by The American College of Veterinary Surgeons.
Affiliation:
Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL.
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