Comparison of limited-contact dynamic compression plate and locking compression plate constructs for proximal
Richard A Rocconi1, James L Carmalt1, Sarah N Sampson1
1Department of Veterinary Clinical Sciences (Rocconi, Sampson), College of Veterinary Medicine, and the Department of Agricultural and Biological Engineering (Elder, Gilbert), College of Agriculture and Life Sciences, Mississippi State University, Mississippi State, Mississippi 39762, USA; Department of Large Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus Drive, Saskatoon, Saskatchewan S7N 5B4 (Carmalt).
Abstract:
This study compared in vitro monotonic and cyclic mechanical properties of equine proximal interphalangeal joint arthrodeses stabilized using an open or closed technique combined with axial 4.5 mm narrow limited-contact dynamic compression plate (LC-DCP) or 4.5 mm narrow locking compression plate (LCP). Ten forelimb pairs were randomly assigned to LCP or LC-DCP groups. One limb in each pair was assigned to either open or closed technique. Limbs were tested for cyclic fatigue at 20 000 cycles and then single-cycle to failure under 3-point dorsopalmar bending. There was no significant difference in stiffness of constructs during cyclic fatigue testing or on force or stiffness at failure in single cycle to failure testing between open and closed techniques or between plate types. Both implants, surgical technique, or combinations thereof are suitable for clinical use. More work is necessary to define the interaction between implant type and surgical technique.
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