Biomechanical comparison of two implants for the stabilization of incomplete ossification of the humeral condyle lesions in dogs. Issue 1 (13th December 2013)

• Record Type: Journal Article
• Authors: Coggeshall, Jason D.; Lewis, Daniel D.; Fitzpatrick, Noel; Conrad, Bryan P.; Swanson, Katy R.; Kim, Stanley E.; Palm, Lindsey S.; Tremolada, Giovanni; Pozzi, Antonio
• Is Part Of: Veterinary surgery. Volume 43:Issue 1(2014)
• Page Start: 58
• Page End: 65
• Publication Date: 2013-12-13
• Subjects: Veterinary surgery -- Periodicals; Veterinary Medicine -- Periodicals; Surgery -- Periodicals; Societies, Medical -- Periodicals; 636.0897
• DOI: 10.1111/j.1532-950X.2013.12077.x
• Languages: English
• ISSNs: 0161-3499

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="vsu12077-sec-0001" sec-type="section"> <title>Objective</title> <p>To compare biomechanical properties of (1) 4.5 mm cortical screws and Fitz Fenestrated Tubular Transcondylar (F<sup>2</sup>T<sup>2</sup>) screws; (2) normal humeri and humeri with an intracondylar osteotomy; and (3) humeri with an intracondylar osteotomy stabilized with either a 4.5 mm cortical screw or a F<sup>2</sup>T<sup>2</sup> screw.</p> </sec> <sec id="vsu12077-sec-0002" sec-type="section"> <title>Study Design</title> <p>Cadaveric biomechanical assessment.</p> </sec> <sec id="vsu12077-sec-0003" sec-type="section"> <title>Sample Population</title> <p>4.5 mm cortical screws (n = 10), 5.85 mm F<sup>2</sup>T<sup>2</sup> screws (n = 10), and paired dog humeri (n = 40).</p> </sec> <sec id="vsu12077-sec-0004" sec-type="section"> <title>Methods</title> <p>Cortical and F<sup>2</sup>T<sup>2</sup> screws were loaded to failure in 3‐point bending. Ten pairs of humeri with or without an intracondylar osteotomy were axially loaded to failure. Ten additional pairs of humeri with an intracondylar osteotomy were alternately stabilized with a positional cortical or F<sup>2</sup>T<sup>2</sup> screw and axially loaded to failure.</p> </sec> <sec id="vsu12077-sec-0005" sec-type="section"> <title>Results</title> <p>Mean stiffness, yield load, and failure load was significantly greater (<italic>P</italic> < .001) for the F<sup>2</sup>T<sup>2</sup> screws compared with cortical screws as well as for intact humeri compared with humeri with an intracondylar osteotomy (<italic>P</italic> < .001). There were no significant differences in mean stiffness (<italic>P</italic> = .59), yield load (<italic>P</italic> = .31), or failure load (<italic>P</italic> = .24) between humeri with stabilized intracondylar osteotomy.</p> </sec> <sec id="vsu12077-sec-0006" sec-type="section"> <title>Conclusion</title> <p>Isolated F<sup>2</sup>T<sup>2</sup> screws have superior mechanical properties to 4.5 mm cortical screws when loaded in 3‐point bending. Intracondylar osteotomy adversely affected humeral mechanical integrity. Osteotomized humeri stabilized by either screw had comparable mechanical properties.</p> </sec> </abstract>