Development of low-shrinkage dental adhesives via blending with spiroorthocarbonate expanding monomer and unsaturated epoxy resin monomer. (September 2022)

• Record Type: Journal Article
• Authors: Wang, Zonghua; Zhang, Xiaoran; Yao, Shuo; Zhao, Jiaxin; Zhou, Chuanjian; Wu, Junling
• Is Part Of: Journal of the mechanical behavior of biomedical materials. Volume 133(2022)
• Publication Date: 2022-09
• Subjects: Resin adhesives -- Expanding monomer -- Unsaturated epoxy resin monomer -- Polymerization shrinkage -- Compatibility; Biomedical materials -- Periodicals; Biomedical materials -- Mechanical properties -- Periodicals; Biomedical materials; Biomedical materials -- Mechanical properties; Periodicals; Electronic journals; 610.28
• DOI: 10.1016/j.jmbbm.2022.105308
• Languages: English
• ISSNs: 1751-6161

Abstract

Abstract: Polymerization shrinkage is one of the main drawbacks of dental resin adhesives. In this study, spiroorthocarbonate expanding monomer 3, 9-diethyl-3, 9-dimethylol −1, 5, 7, 11-tetraoxaspiro-[5, 5] undecane (DDTU) and unsaturated epoxy resin monomer Diallyl bisphenol A diglycidyl ether (DBDE) were synthesized and utilized as anti-shrinkage-coupling additive of methacrylate-based adhesives. Polymerization process and physicochemical properties including double bond conversion, polymerization shrinkage, compatibility, mechanical performance, thermal stability, contact angle, shear bond strength and cytotoxicity were characterized. Results indicated that adhesives containing anti-shrinkage-coupling additive had reduced volume shrinkage, improved compatibility and enhanced shear bond strength. When the amount of additive was 20 wt%, the volume shrinkage was decreased by 45.8% (4.17 ± 0.32%) and the shear bond strength was increased by 49.6% (19.64 ± 0.99 MPa). The results also showed that the use of additive had no adversely affect on double bond conversion and cytotoxicity. Therefore, novel low-shrinkage resin adhesives were prepared via blending with spiroorthocarbonate expanding monomer and unsaturated epoxy resin monomer. Highlights: The spiroorthocarbonate expanding monomer and unsaturated epoxy resin monomer are synthesized. The unsaturated epoxy resin monomer serves as a compatibilizer to improve compatibility. Great reduction in polymerization volume shrinkage of experimental adhesives are observed. The application of anti-shrinkage - coupling additive enhances the shear bond strength.