An In Vitro Biomechanical Comparison of a Limited‐Contact Dynamic Compression Plate Fixation with a Dynamic Compression Plate Fixation of Osteotomized Equine Third Metacarpal Bones

Abstract

The clinical relevance of the cyclic fatigue data supports the conclusion that the broad DCP fixation is biomechanically superior to the broad LC-DCP fixation in osteotomized equine MC3 bones despite the results of the static overload testing.

An In Vitro Evaluation of Plate Luting Using Osteotomized Equine Third Metacarpal Bones with a Limited Contact‐Dynamic Compression Plate

“…In cyclic fatigue testing, under 4‐point bending, the maximum load of 7.5 kN was chosen to be 50% of the mean yield load of the LC‐DCP‐MC3 construct in a pilot study, thus within the elastic region of the load deformation curve. This load allowed cyclic testing to failure within a reasonable time limit and comparison with previous results 10 . The resulting maximum bending moment (148.1 N m) exceeded the maximum physiologic bending moment on equine MC3 during walking (11.8 N m for a weight range of 450–550 kg).…”

“…In an in vitro study, using osteotomized equine 3rd metacarpal bones (MC3), the broad LC‐DCP offered increased stability in static overload testing than the broad DCP, however, the broad LC‐DCP offered significantly less stability in cyclic fatigue testing than the broad DCP 10 . If luting of broad LC‐DCPs increases the fatigue life of cyclically loaded plates, then the LC‐DCP may offer an alternative, with increased static stability, to the traditional DCP in large animal long bone fractures.…”

An In Vitro Biomechanical Comparison of a Prototype Equine Metacarpal Dynamic Compression Plate Fixation with Double Dynamic Compression Plate Fixation of Osteotomized Equine Third Metacarpal Bones

“…The concept of biologic plating is often difficult to achieve in equine orthopedic surgery. In an in vitro study, using osteotomized equine third metacarpal bones, broad 4.5 mm limited contact dynamic compression plate (LC‐DCP), a biological plate, had a shorter cyclic fatigue life than a single broad 4.5 mm DCP, with and without plate luting 9,10 . The typical horse is ambulatory and fully weight bearing in the immediate postoperative period 2,11 .…”

Mechanical properties of Indonesian-made narrow dynamic compression plate

“…Nonetheless, the DCP is often used, because it has a better fatigue strength, whereas the contact area appeared comparable to the LC-DCP (Disegi and Eschbach, 2000;Field et al, 1997;Sod et al, 2005).…”