Comparison of three methods of ulnar fixation in horses.
Abstract: This study compares the mechanical properties of three methods of equine ulnar fixation: dynamic compression plating, pins and wires tension band, and a prototype grip system. Methods: The mechanical properties of dynamic compression plating, pins and wires tension band, and a prototype grip system repair of equine ulnar fractures were evaluated in a cadaveric osteotomy model. Methods: Fifteen pairs of the radius and ulna from equine cadavers. Methods: The three repair techniques were evaluated to mimic the pull of the triceps brachii muscle in single cycle to failure and in cyclic fatigue loading. Single cycle results were evaluated as the axial and angular displacement. Cyclic fatigue results were evaluated as the number of cycles to failure. Results: Dynamic compression plate fixation and pins and wires tension band had significantly less axial displacement of the proximal fragment than the grip system (P < .05). No significant difference in angular rotation of the proximal fragment was present between the three techniques. Dynamic compression plating had significantly greater fatigue resistance than the grip system (P < .05). Cyclic failure was characterized by screw loosening or breakage and wire breakage. Conclusions: Dynamic compression plates were better than the other techniques at maintaining compression of a transverse ulnar osteotomy at the level of the anconeal process just proximal to the trochlear notch. Conclusions: Knowledge of fixation technique mechanical properties is essential for surgeons to select the proper method of fracture repair.
Publication Date: 1997-05-01 PubMed ID: 9150553DOI: 10.1111/j.1532-950x.1997.tb01480.xGoogle Scholar: Lookup
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- Comparative Study
- Journal Article
- Research Support
- Non-U.S. Gov't
Summary
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The research paper investigates the differences in the mechanical properties of three methods used for fixing fractures in a horse’s ulna. It concludes that dynamic compression plates perform better in maintaining compression of a transverse ulnar osteotomy compared to the other two techniques studied.
Research Methodology
- The study analyzed the mechanical properties of three methods of equine ulnar fixation: dynamic compression plating, pins and wires tension band, and a prototype grip system, using a cadaveric osteotomy model.
- A total of fifteen pairs of radius and ulna from equine cadavers were used for this research.
- The repair techniques were tested by mimicking the force exerted by the triceps brachii muscle in both a single-cycle-to-failure scenario and in cyclic fatigue loading.
- For the single cycle, the results were evaluated based on the axial and angular displacements of the ulna, while the cyclic fatigue was evaluated based on the number of cycles to failure.
Research Findings
- The dynamic compression plate fixation and pins and wires tension band showed significantly less proximal axial displacement compared to the grip system, implying these two methods maintain better stability of the fracture.
- No significant difference was observed in the amount of angular rotation of the proximal fragment among the three techniques.
- Dynamic compression plating was found to have significantly higher resistance to fatigue compared to the grip system, indicating it provides lasting stability and recovery.
- The cyclic failure of the methods was characterized by a loosening or breakage of screws and wires, a crucial variable for surgeons to consider while selecting a repair method.
Conclusions
- Overall, dynamic compression plates proved superior in maintaining compression of a transverse ulnar osteotomy at the level of the anconeal process just proximal to the trochlear notch.
- The authors emphasized that understanding the mechanical properties of each fixation technique is vital for surgeons, in order to choose the most appropriate and effective method for fracture repair.
Cite This Article
APA
Hanson PD, Hartwig H, Markel MD.
(1997).
Comparison of three methods of ulnar fixation in horses.
Vet Surg, 26(3), 165-171.
https://doi.org/10.1111/j.1532-950x.1997.tb01480.x Publication
Researcher Affiliations
- Comparative Orthopaedic Research Laboratory, School of Veterinary Medicine, University of Wisconsin, Madison, USA.
MeSH Terms
- Analysis of Variance
- Animals
- Bone Nails / veterinary
- Bone Plates / veterinary
- Bone Wires / veterinary
- Equipment Design
- Fracture Fixation, Internal / instrumentation
- Fracture Fixation, Internal / methods
- Fracture Fixation, Internal / veterinary
- Horses / injuries
- Horses / surgery
- Internal Fixators / veterinary
- Radius Fractures / surgery
- Radius Fractures / veterinary
- Random Allocation
- Stress, Mechanical
- Ulna Fractures / surgery
- Ulna Fractures / veterinary
Citations
This article has been cited 1 times.- Janicek JC, Rodgerson DH, Hunt RJ, Spirito MA, Thorpe PE, Tessman RK. Racing prognosis of horses following surgically repaired olecranon fractures. Can Vet J 2006 Mar;47(3):241-5.
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