In Vitro Mechanical Comparison of 2.0 and 2.4 Limited-Contact Dynamic Compression Plates and 2.0 Dynamic Compression Plates of Different Thicknesses

• Published in: Veterinary surgery Vol. 39; no. 7; pp. 824 - 828
• Main Authors: Strom, Adam M, Garcia, Tanya C, Jandrey, Karl, Huber, Michael L, Stover, Susan M
• Format: Journal Article
• Language: English
• Published: Malden, USA Malden, USA : Blackwell Publishing Inc 01.10.2010; Blackwell Publishing Inc; Blackwell Publishing Ltd
• Subjects: Animals; Bending; bending strength; Biomechanical Phenomena; body size; bone diseases; bone fractures; Bone Plates - veterinary; Bones; cat diseases; cats; Compressive Strength; dimensions; dog diseases; dogs; dynamic compression plate; dynamic load; fracture fixation; Fracture Fixation, Internal - veterinary; in vitro studies; Internal Fixators; limited contact dynamic compression plate; Materials Testing; Mechanical properties; miniature breeds; prostheses; stainless steel; Stainless Steel - chemistry; Tensile Strength; thickness; Transplants & implants; Veterinary medicine
• ISSN: 0161-3499; 1532-950X
• DOI: 10.1111/j.1532-950X.2010.00736.x

To compare the bending structural stiffness and bending strength of thick and thin 2.4 mm limited contact dynamic compression plates (2.4 LC-DCP), 2.0 mm LC-DCP (2.0 LC-DCP), and 2.0 dynamic compression plates (2.0 DCP). In vitro mechanical study. Two thicknesses of 2.4 LC-DCP, 2.0 LC-DCP, and 2.0 DCP stainless-steel plates were tested in 4-point bending. Data were collected during bending until implants plastically deformed. Bending structural stiffness and bending strength were determined from load displacement curves. Mechanical properties were compared between plates and the effects of plate type, size, and thickness on stiffness and strength were assessed using ANOVA. The thick 2.4 LC-DCP implant was the stiffest and strongest; the thin 2.0 DCP implant was most compliant and weakest. Larger sized plates, thicker plates, and limited contact design of plates enhanced stiffness and strength. For the plates studied, plate size had a larger effect than plate type or thickness on stiffness and strength. Increasing the size (width) and thickness of plates increases both the bending structural stiffness and strength. For the plates studied, LC-DCP implants were stiffer and stronger than DCP implants. Plate bending structural stiffness and strength can be most effectively enhanced by using a larger sized plate, but gains can also be achieved by using a thicker plate and/or an LC-DCP instead of a DCP implant when possible.