Biodegradation of Resin-Dentin Interfaces Increases Bacterial Microleakage

作者: S. Kermanshahi , J.P. Santerre , D.G. Cvitkovitch , Y. Finer

DOI: 10.1177/0022034510372885

关键词:

摘要: Bis-GMA-containing resin composites and adhesives undergo biodegradation by human-saliva-derived esterases, yielding Bis-hydroxy-propoxy-phenyl-propane (Bis-HPPP). The hypothesis of this study is that the exposure dental restorations to saliva-like esterase activities accelerates marginal bacterial microleakage. Resin (Scotchbond, Z250, 3M) bonded human dentin were incubated in either buffer or dual-esterase media (pseudocholinesterase/cholesterol-esterase; PCE+CE), with activity levels simulating those saliva, for up 90 days. Incubation solutions analyzed Bis-HPPP high-performance liquid chromatography. Post-incubation, specimens suspended a chemostat-based biofilm fermentor cultivating Streptococcus mutans NG8, primary species associated caries, 7 Bacterial microleakage was assessed confocal laser scanning microscopy. production depth spatial volume cell penetration within interface increased incubation time higher 30- 90-day PCE+CE vs. buffer-incubated groups, suggesting can contribute formation recurrent decay.

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