Effect of enzymatic degradation and hydrolysis on 3D-printed resin-based composite material for temporary dental crowns and bridges

Abstract Additive manufacturing of dental prostheses e.g. composite materials is continuously finding broader application in dentistry. In the oral environment, are subjected to hydrolysis and accelerated by enzymes. With aim compare an additively manufactured with a self-curing CAD/CAM material same composition, effect enzymatic degradation on were investigated. The experimental composites consisted 50 wt. % inorganic filler monomer matrix (BisEMA, BisGMA, TEGDMA). influence via buffer system was investigated comparison cholesterol esterase over 22 days. detection products time conducted HPLC-DAD analysis. Degradation monomers calibrated were: TEGDMA, BisEMA, MA, TEGMA, Bis-HPPP E-bis-PA. Surface roughness polished specimens measured AFM hardness Vickers micro tester. After hydrolysis, BisGMA detected eluates composites. samples fabricated behaved similar during where additionally MA detected. degradation, furthermore TEGMA BisEMA qualitatively. contrast, exhibited traces TEGDMA after degradation. Hereof detectable upon BisGMA. comparable for all whereas lowest 3D printed material. Enzymatic had no surface hardness. appeared have low susceptibility hydrolysis. Due process, polishability initial poorer.