Synthesis and characterization of Ciprofloxacin-containing divinyl oligomers and assessment of their biodegradation in simulated salivary esterase. Issue 5 (May 2018)

• Record Type: Journal Article
• Authors: Delaviz, Yasaman; Nascimento, Mitchell A.; Laschuk, Michael W.; Liu, Timothy W.; Yang, Meilin; Santerre, J. Paul
• Is Part Of: Dental materials. Volume 34:Issue 5(2018)
• Page Start: 711
• Page End: 725
• Publication Date: 2018-05
• Subjects: Dental materials -- Adhesive systems -- Dimethacrylate -- Divinyl oligomers -- Antibacterial -- Ciprofloxacin -- Biodegradation; Dentistry -- Periodicals; Dental materials -- Periodicals; 617.695
• DOI: 10.1016/j.dental.2018.01.021
• Languages: English
• ISSNs: 0109-5641

Abstract

Graphical abstract: Highlights: Synthesis/characterization of original divinyl oligomers for Ciprofloxacin release. Addressing challenges with oligomer syntheses using self-associating antibiotics. Degradation-mediated release of Ciprofloxacin via covalent coupling of drug. The antimicrobial dimethacrylates show potential for use in dental adhesives. Abstract: Objective: Two leading causes contributing to dental restoration replacement are the marginal breakdown at the composite/dentin interface and secondary caries mediated by bacteria. The objective of the present study was to synthesize oligomers which incorporated enhanced bio-stability but would also be able to generate antimicrobial function if they underwent degradation. Methods: Stability was incorporated into the oligomers by generating structural features that would physically hinder the availability of hydrolytically sensitive groups in the oligomers. As a proof-of concept for the antibacterial feature, antimicrobial function was achieved by covalently incorporating Ciprofloxacin (CF) into the backbone of cross-linking divinyl oligomers (referred to as EDV and HLH-CFPEG). The hydrolytic stability of the oligomers was studied in simulated human salivary esterase and compared to the commercial monomer 2, 2-bis[4(2-hydroxy-3-methacryloxypropoxy)-phenyl]propane (BisGMA). Results: Both drug oligomers were found to be significantly more stable than BisGMA. Upon degradation, both drug oligomers released CF differentially in free form. Polymer synthesis from resin formulations containing 15 wt% HLH-CFPEG showed a high degree of vinyl group conversion and gel content, and under hydrolytic conditions showed the release of CF during a 28-day monitoring study period. Significance: HLH-CFPEG can be used in dental resin adhesive systems for local delivery of CF to the marginal interface. Minimizing the growth of Streptococcus mutans at the marginal site can improve longevity by reducing esterase activity derived specifically from S. mutans .