Abstract
BackgroundFracture of the ilium is common orthopedic injury that often requires surgical stabilization in canine patients. Of the various methods of surgical stabilization available, application of a lateral bone plate to the ilium is the most common method of fixation. Many plating options are available, each having its own advantages and disadvantages. The purpose of this study was to evaluate the biomechanical properties of a 3.5 mm String-of-Pearls™ plate and a 3.5 mm dynamic compression plate in a cadaveric canine ilial fracture model. Hemipelves were tested in cantilever bending to failure and construct stiffness, yield load, displacement at yield, ultimate load, and mode of failure were compared.ResultsThe mean stiffness of dynamic compression plate (116 ± 47 N/mm) and String-of-Pearls™ plate (107 ± 18 N/mm) constructs, mean yield load of dynamic compression plate (793 ± 333 N) and String-of-Pearls™ plate (860 ± 207 N) constructs, mean displacement at yield of dynamic compression plate (8.6 ± 3.0 mm) and String-of-Pearls™ plate (10.2 ± 2.8 mm) constructs, and ultimate load at failure of dynamic compression plate (936 ± 320 N) and String-of-Pearls™ plate (939 ± 191 N) constructs were not significantly different. No differences were found between constructs with respect to mode of failure.ConclusionsNo significant biomechanical differences were found between String-of-Pearls™ plate and dynamic compression plate constructs in this simplified cadaveric canine ilial fracture model.
Highlights
Fracture of the ilium is common orthopedic injury that often requires surgical stabilization in canine patients
Five left hemipelves and 6 right hemipelves were plated with a Dynamic Compression Plates (DCP) construct
No significant differences were found between groups for stiffness, ultimate load at failure, displacement at yield, or yield load (Table 1 and Fig. 4)
Summary
Fracture of the ilium is common orthopedic injury that often requires surgical stabilization in canine patients. The most common complication associated with ilial fracture repair is implant failure, which occurs in up to 62% of patients The majority of these failures are due to screw pull-out, with one of the reasons for this high. Locking implant systems have been developed to provide more stable fracture repair, especially in poorer quality bone, and to minimize the negative impact on local vascularity during fracture healing [1]. These plating systems do not rely on plate-to-bone friction to provide stability, eliminating the need for high shear loads at the screw-to-bone interface [15]. Less plate-to-bone contact decreases the need for precise plate contouring and helps preserve the blood supply to the bone [13,14,15,16,17]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
