Effects on Tissue Integration of Collagen Scaffolds Used for Local Delivery of Gentamicin in a Rat Mandible Defect Model

Abstract

Surgical site infections (SSIs) are a common complication following orthopedic surgery. SSIs may occur secondary to traumatic or contaminated wounds or may result from invasive procedures. The development of biofilms is often associated with implanted materials used to stabilize injuries and to facilitate healing. Regardless of the source, SSIs can be challenging to treat. This has led to the development of devices that act simultaneously as local antibiotic delivery vehicles and as scaffolds for tissue regeneration. The goal for the aforementioned devices is to increase local drug concentration in order to enhance bactericidal activity while reducing the risk of systemic side effects and toxicity from the administered drug. The aims of this study were to assess the effect of antibiotic loading of a collagen matrix on the tissue integration of the matrix using a rat mandibular defect model. We hypothesized that the collagen matrix could load and elute gentamicin, that the collagen matrix would be cytocompatible in vitro, and that the local delivery of a high dose of gentamicin via loaded collagen matrix would negatively impact the tissue–scaffold interface. The results indicate that the collagen matrix could load and elute the antimicrobial gentamicin and that it was cytocompatible in vitro with or without the presence of gentamicin and found no significant impact on the tissue–scaffold interface when the device was loaded with a high dose of gentamicin.

3D-Printed Biomimetic Hydroxyapatite Composite Scaffold Loaded with Curculigoside for Rat Cranial Defect Repair

“…Ongoing efforts are dedicated to crafting an optimal, high-precision, and biodegradable scaffold that aims to exhibit impeccable control over drug release while maintaining a high degree of biocompatibility. , This intricately designed scaffold serves as a template to precisely guide the regeneration of bone tissue . Additionally, it strives to strike a delicate balance between structural integrity and controlled drug delivery, emerging as a promising candidate for advancing the field of bone tissue engineering . However, existing bone repair scaffolds are confronted with certain challenges, such as limited biological activity, uncontrolled drug concentrations, and a sole bone-filling function without bone-inductive capabilities, hindering the effective promotion of vascularization. − Consequently, there is an imperative requirement to engineer multifunctional scaffolds capable of concurrently stimulating angiogenesis and osteogenesis.…”

“… 6 Additionally, it strives to strike a delicate balance between structural integrity and controlled drug delivery, emerging as a promising candidate for advancing the field of bone tissue engineering. 7 However, existing bone repair scaffolds are confronted with certain challenges, such as limited biological activity, uncontrolled drug concentrations, and a sole bone-filling function without bone-inductive capabilities, hindering the effective promotion of vascularization. 8 − 10 Consequently, there is an imperative requirement to engineer multifunctional scaffolds capable of concurrently stimulating angiogenesis and osteogenesis.…”