Presented in part at the Veterinary Orthopedic Society Annual Scientific Meeting, Canyons, UT, March 2012.
Original Article: Research
Biomechanical comparison of two implants for the stabilization of incomplete ossification of the humeral condyle lesions in dogs
Version of Record online: 13 DEC 2013
© Copyright 2013 by The American College of Veterinary Surgeons
Volume 43, Issue 1, pages 58–65, January 2014
How to Cite
Coggeshall, J. D., Lewis, D. D., Fitzpatrick, N., Conrad, B. P., Swanson, K. R., Kim, S. E., Palm, L. S., Tremolada, G. and Pozzi, A. (2014), Biomechanical comparison of two implants for the stabilization of incomplete ossification of the humeral condyle lesions in dogs. Veterinary Surgery, 43: 58–65. doi: 10.1111/j.1532-950X.2013.12077.x
- Issue online: 2 JAN 2014
- Version of Record online: 13 DEC 2013
- Manuscript Accepted: 1 OCT 2013
- Manuscript Received: 1 APR 2013
- University of Florida Comparative Orthopaedics and Biomechanics Laboratory
- Fitzpatrick Referrals, Eashing, UK
To compare biomechanical properties of (1) 4.5 mm cortical screws and Fitz Fenestrated Tubular Transcondylar (F2T2) 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 F2T2 screw.
Cadaveric biomechanical assessment.
4.5 mm cortical screws (n = 10), 5.85 mm F2T2 screws (n = 10), and paired dog humeri (n = 40).
Cortical and F2T2 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 F2T2 screw and axially loaded to failure.
Mean stiffness, yield load, and failure load was significantly greater (P < .001) for the F2T2 screws compared with cortical screws as well as for intact humeri compared with humeri with an intracondylar osteotomy (P < .001). There were no significant differences in mean stiffness (P = .59), yield load (P = .31), or failure load (P = .24) between humeri with stabilized intracondylar osteotomy.
Isolated F2T2 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.