Q: Can I use UltraCem cement for zirconia restorations?
A: Yes. Apply Peak™ Universal Bond adhesive to the preparation using a scrubbing motion for 10 seconds (no etchant is required.) Aggressively air thin until the surface appears dull and light cure for 10 seconds with VALO™ LED curing light. For best results, sandblast the inside of the zirconia prosthesis; clean with air/water spray, and dry.
Q: Can I use a zirconia primer with UltraCem cement?
A: Never use phosphoric acid to clean zirconia, as it will significantly reduce bond strengths. Do not use a zirconia primer with UltraCem resin-reinforced glass ionomer cement.
Q: What is the working time and set time of UltraCem resin-reinforced glass ionomer cement?
A: Working time is between 1-3 minutes. At about 3 minutes, UltraCem cement will start to cure and become more gel-like. This is the stage where removal of excess cement around the prep is the easiest. UltraCem cement will be fully set in the mouth in 5 minutes. Note: UltraCem cement will set up less quickly on a mixing pad than in the mouth.
Q: How does UltraCem cement achieve such high bond strengths compared to other RRGI Cements on the market?
A: UltraCem cement’s formula contains polyacrylic acid, which is self-etching. Longer setting time is needed for it to effectively etch the tooth surface, thus yielding the higher bond strengths.
Q: How many crowns can be cemented with one SpeedMix Syringe?
A: One unit-dose syringe can cement up to two crowns.