Single cycle to failure in bending of three standard and five locking plates and plate constructs

C. A. Blake; R. J. Boudrieau; B. S. Torrance; E. K. Tacvorian; J. B. Cabassu; G. R. Gaudette; M. P. Kowaleski

doi:10.3415/VCOT-11-04-0061

Veterinary and Comparative Orthopaedics and Traumatology, Table of Contents

Vet Comp Orthop Traumatol 2011; 24(06): 408-417
DOI: 10.3415/VCOT-11-04-0061

Original Research

Schattauer GmbH

Single cycle to failure in bending of three standard and five locking plates and plate constructs

C. A. Blake

¹Cummings School of Veterinary Medicine at Tufts University, Department of Clinical Sciences, North Grafton, Massachusetts, USA

,

R. J. Boudrieau

¹Cummings School of Veterinary Medicine at Tufts University, Department of Clinical Sciences, North Grafton, Massachusetts, USA

,

B. S. Torrance

¹Cummings School of Veterinary Medicine at Tufts University, Department of Clinical Sciences, North Grafton, Massachusetts, USA

,

E. K. Tacvorian

²Worcester Polytechnic Institute, Worcester, Massachusetts, USA

,

J. B. Cabassu

¹Cummings School of Veterinary Medicine at Tufts University, Department of Clinical Sciences, North Grafton, Massachusetts, USA

,

G. R. Gaudette

²Worcester Polytechnic Institute, Worcester, Massachusetts, USA

,

M. P. Kowaleski

¹Cummings School of Veterinary Medicine at Tufts University, Department of Clinical Sciences, North Grafton, Massachusetts, USA

› Author Affiliations

Abstract

Summary

Objective: To evaluate the biomechanical properties of standard and locking plates in bending. We hypothesised that titanium (Ti) constructs would have the greatest deformation and that String of Pearl (SOP) constructs would have the greatest strength and stiffness, and would behave differently compared to plates alone.

Methods: Dynamic compression plates (DCP), stainless steel (SS) limited contact (LC)-DCP®, Ti LC-DCP, locking compression plates (LCP), 10 mm and 11 mm advanced locking plate system (ALPS 10 / 11), SOP and Fixin plates were evaluated individually and as constructs applied to a validated bone model simulating a bridging osteosynthesis. Bending stiffness and strength were compared using one-way ANOVA with post hoc Tukey, and un-paired t-test (p <0.05).

Results: The SOP plates had significantly greater stiffness than all other plates Ti LCDCP, ALPS 10 and Fixin plates had significantly lower stiffness than all other plates. The SOP constructs had the highest mean bending stiffness, and strength that was significantly different from only the Ti LC-DCP, ALPS 10 and Fixin constructs. The ALPS 10 constructs had the lowest mean bending stiffness, and strength that was significantly different from only ALPS 11 and SOP constructs. Comparison of bending structural stiffness of plates versus constructs showed a significant difference in all plate pairs except for the DCP and ALPS 10.

Clinical relevance: Due to differing plate construct properties inherent to these diverse implant systems, identical approaches to fracture management and plate application cannot be applied.

Presented at the 38^th Annual Conference of the Veterinary Orthopedic Society, Snowmass, CO, USA March 6, 2011 (Mark S. Bloomberg Memorial Research Award recipient).

Keywords

Biomechanics - bone plate - four-point bending - in vitro

Full Text

References

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