Effect of thermocycling on the amount of monomer released from bulk fill composite resins

• Published in: Dental Materials Journal Vol. 38; no. 6; pp. 1019 - 1025
• Main Authors: HATİPOǦLU, Ömer, KARADAŞ, Muhammet, ER, Havva, TURUMTAY, Emine AKYÜZ
• Format: Journal Article
• Language: English
• Published: Tokyo The Japanese Society for Dental Materials and Devices 01-12-2019; Japanese Society for Dental Materials and Devices; Japan Science and Technology Agency
• Subjects: Bisphenol A glycidyl methacrylate; Composite materials; Composite resins; Dentistry; Elution; High-performance liquid chromatography; HPLC; Liquid chromatography; Low molecular weights; Molecular weight; Monomers; Polymer matrix composites; Polymers; Residual monomer; Resins; Thermal cycling; Variance analysis
• ISSN: 0287-4547; 1881-1361
• DOI: 10.4012/dmj.2018-377

The goal of this study was to examine the effect of thermal cycling on the amount of monomer released from bulk fill composites. Five bulk fill composite resins were used in the study. Extraction solutions were obtained at the end of the time/thermal cycle periods: 0–1 day/0–1,500, 1–3 days/1,500–4,500 and 3–7 days/4,500–10,000. The monomers in the extractions samples taken at each time point were measured on an HPLC instrument. The obtained data were analyzed by repeated measures of variance analysis and tukey multiple comparison tests (p<0.05). The thermocycling increased the amount of monomer released from all composites at 0–1 day (p<0.05). At 0–1 and 1–3 days, Venus Bulk Fill and Filtek Bulk Fill composite resins were more affected. Polymer networks with high molecular weight monomers such as Bis-GMA and UDMA can be less affected by thermal changes compared to polymers with low molecular weight monomers.