What is RMGI cement?
The RMGI or RRGI (resin-reinforced glass ionomer) cements are indicated for the luting of crowns and bridges, as well as inlay and onlay restorations. They are essentially hybrid formulations of resin and glass ionomer components.
How do you use Ionocem cement?
Carefully shake the liquid and dispense one drop. Mix the two by gently folding the powder into the liquid; mixing should take up to 15 seconds. Apply the cement. Using a calcium hydroxide applicator, pick up the cement and carefully place it into the prepared cavity, allowing it to flow over the surface.
How long does glass ionomer take to set?
2–3 min
Glass-ionomers set within 2–3 min from mixing by an acid-base reaction. The first step is a reaction with hydrated protons from the polyacid at basic sites on the surface of the glass particles.
Do you cure glass ionomer?
Auto cure GIC is preferable as a restorative material to Light cured GIC, or resin modified glass ionomer cement (RMGIC). RMGICs have poor wear resistance on occlusal surfaces and in larger restorations the curing light does not penetrate to the base of the restoration (due to the high opacity).
How does RMGI bond to tooth?
Adhesion of the RMGIC to dental hard tissues takes place through 2 different mechanisms: 1) a chemical bonding which occurred polyalkenoic acid chains and calcium ions in hydroxyapatite, 2) a micro-mechanical retention procured by the infiltration of the organic components into a partially demineralized dentin surface …
What type of cement is used for veneers?
As a general rule, it is better to cement veneers with total-etch, light-cured esthetic resin cements rather than self-adhesive resin cements. Many self-adhesive resin cements can have a slight color shift over time that may affect the esthetics of a veneer.
What is cement filling in tooth?
The filling procedure involves the dentist removing the the decayed tooth material, cleaning the affected area, and then filling the cleaned out cavity with dental cement. A filling also helps prevent further decay and forms a seal between the filling and tooth interface.
How do you prolong the working time of zinc phosphate cement?
Because the reaction between powder and liquid is exothermic, the most effective method to control the working and setting time is to regulate the temperature of the mixing tile. Cooling this tile significantly decreases the chemical reaction between the powder and the liquid, delaying the formation of the matrix.
Can you use Nexus RMGI on ceramic crowns?
Yes. Nexus RMGI is contraindicated for pulp capping. In addition, this product is not to be used on veneers or all ceramic/porcelain crowns and onlays. In rare cases, the product may cause sensitivity in some people.
Which is the best RMGI for dental cement?
Nexus™ RMGI. Cements. Only Kerr Nexus™ RMGI combines One-Peel™ cleanup, tack cure capability, and outstanding bond strength for consistent predictable outcomes. As the first RMGI available with advanced Nexus™ Technology, Nexus RMGI provides an optimal gel state and 2–3 second tack cure capability to ensure easier cleanup each and every time.
How many Automix tips are in a nexus RMGI?
Nexus RMGI is offered in a paste/paste formulation and is packaged in dual barrel syringes with single-use regular automix tips. Wide automix tips are available for purchase in a package of 8 and additional regular automix tips are available in a package of 50.
How long does it take for Nexus RMGI to gel?
You can tack-cure (1-2 seconds) Nexus RMGI immediately after placement to hasten gel state or you can also allow Nexus RMGI to self-cure (minimum of 1.5’) to reach its gel state. What are the key advantages Nexus RMGI offers the dentist?