Biomechanical comparison of canine median sternotomy closure using suture tape and orthopedic wire cerclage

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Abstract
Objective: To compare the mechanical properties of suture tape and orthopedic wire cerclage in an ex vivo canine median sternotomy model.Study design: Ex vivo.Animals: Twelve large‐breed canine cadaveric sternums.Methods: Median sternotomies were performed, leaving the manubrium intact. The specimens were randomly assigned to group W (20‐gauge stainless steel orthopedic wire cerclage in a figure‐of‐eight pattern) or group ST (suture tape in a figure‐of‐eight pattern). Each specimen was laterally distracted until failure using an electrodynamic materials‐testing system.Results: No differences were observed for displacement, yield load, maximum load, implant failure between the groups. The orthopedic wire construct was stiffer than the suture tape construct.Conclusion: Suture tape was biomechanically similar to orthopedic wire cerclage for sternotomy closure in dogs, although wire constructs were stiffer.Clinical significance: Suture tape may represent an alternative to cerclage wire for sternotomy closure in dogs. Additional studies evaluating its clinical use are needed.

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