What is the bond strength on a porcelain touch-up? What is the appropriate protocol?
When bonding Vertise Flow to porcelain, no hydrofluoric acid etch or silane primer is necessary. The bond strength of Vertise Flow to non-HF-etched/non-silanated porcelain is very good (approximately 34 MPa). The protocol is as follows: • Sandblast porcelain bonding surface (along with metal/tooth surface, if involved) • Apply the first layer of Vertise Flow with moderate pressure for 15-20 seconds, light-cure for 20 seconds. For A3.5 and Universal Opaque, cure for 40 seconds. • If necessary, build the restoration incrementally with Vertise Flow in 2mm or less thickness, light-cure for 20 seconds. For A3.5 and Universal Opaque, cure for 40 seconds.
