PMID- 28443832 OWN - Quintessenz Verlags-GmbH CI - Copyright Quintessenz Verlags-GmbH OCI - Copyright Quintessenz Verlags-GmbH TA - J Adhes Dent JT - The Journal of Adhesive Dentistry IS - 1757-9988 (Electronic) IP - 2 VI - 19 PST - ppublish DP - 2017 PG - 177-183 LA - en TI - Protective Buffering Capacity of Restorative Dental Materials In Vitro LID - 10.3290/j.jad.a38140 [doi] FAU - Fuss, Markus AU - Fuss M FAU - Wicht, Michael J. AU - Wicht M FAU - Attin, Thomas AU - Attin T FAU - Derman, Sonja H. M. AU - Derman S FAU - Noack, Michael J. AU - Noack M CN - OT - buffering capacity OT - ion release OT - bioactive glass OT - secondary caries OT - composite OT - erosion AB - Purpose: To investigate the buffering capacity of restorative materials during a simulated carious and intrinsic erosive attack. Materials and Methods: Cavities with a volume of 130 μl were milled (Cerec MC XL) out of blocks of Ceram X Mono (CM), Quixfil (QX), Filtek Supreme (FS), Apa Fill 3 (AF), an experimental dual-curing composite containing a bioactive glass (EX), Dyract eXtra (DY), Beautifil (BE), Equia Fil (EQ), Telio CAD (TL) (negative control), TheraCal (TC; positive control), and extracted teeth (ED). 80 μl of lactic acid (pH 4.5) and hydrochloric acid (pH 2.6) were each pipetted into the cavities of two samples of each material. Change of pH in the solutions was measured continuously for 12 min using a calibrated pH electrode. Results: CM, AF, and FS (final pH 3.0-3.2) neutralized hydrochloric acid to a significantly lesser extent than did BE, EQ, DY and QX (final pH 5.0-5.6) (p < 0.05, ANOVA Scheffé). The lactic-acid buffering capacity of CM, BE, and AF was equivalent (final pH 6.3-7.4) to that of ED (7.5), but was surpassed by FS (pH 8.0). pH values for EX and TC (final pH 9.2-11.3) increased significantly (p < 0.05) in response to both acids. Conclusions: Conventional restorative materials do not buffer better than human teeth. However, the experimental composite demonstrates that buffering against carious and intrinsic erosive acid attacks is technically feasible. AID - 843346