Nexus™ RMGI

Nexus™ RMGI is a radiopaque resin-modified glass ionomer luting cement

No, this a dual-cure material. You can let the material self-cure or tack-cure prior to removing excess cement.

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. If any such reactions are experienced, discontinue the use of the product and refer to a physician.

Prepare tooth in usual manner. For pulp capping use calcium hydroxide or other suitable pulp capping material. Remove provisional restoration. Clean the preparation with pumice and water. Rinse thoroughly with water. Air dry preparation (do not desiccate). The preparation or cavity should be just dry enough that the surface has a slightly glossy appearance. Over drying can lead to post-operative sensitivity. Try in restoration to ensure proper fit. Adjust if needed. Thoroughly clean the bonding surfaces of the restoration. Remove the syringe from the foil pouch. Note the date the syringe was removed on the syringe label. Remove the sealing cap from the syringe. Check the syringe openings for blockage; remove any paste plugs. Before the first use or after a long interval between uses, squeeze out a small quantity of paste onto a pad to equalize the base and catalyst paste in the syringe. Discard the paste which has been squeezed out. Attach a new mixing tip and secure it by turning it to the right. Squeeze out and discard a peppercorn-size quantity until an evenly mixed paste in a homogenous color flows out of the tip. The paste requires a certain amount of time to flow through the mixing tip. The flow through speed cannot be accelerated by increasing the pressure on the plunger. As soon as the pressure on the plunger decreases, the material flow stops and the paste begins to set up. Do not use force to press out paste that has set as this could cause damage to the mixing tip and the syringe. Dispensing of the material can be done as follows: Inlay/Onlay – Dispense the cement directly into the cavity preparation covering all surfaces. Seat the restoration gently onto the tooth prep, allowing the cement to flow from all sides. Crown – Dispense the cement directly into the restoration, covering all surfaces. Seat the restoration gently onto the tooth prep, allowing the cement to flow from all margins. Post – Prepare the post space. Size and fit the post. Dispense the cement onto the post or directly into the canal space. Seat the post and vibrate slightly to avoid trapped air. Allow the cement to slowly flow from the canal space. When the restoration is properly seated, remove excess cement. Excess cement is best removed in its gel state with a scaler or explorer. Gel state can be achieved by tack-curing excess with a light for approximately 2-3 seconds, or by allowing the cement to self-cure for approximately 2’-2’30” after application. Finish the restoration and check occlusion when material has completely set. Material should completely set within 4’30” after placement in the mouth. Remove the used mixing tip and replace it with the sealing cap. Do not leave the used mixing tip on the syringe for a long period of time. When only a small amount of paste remains in the syringe, the paste may not be dispensed from the mixing tip.

Set time is less than 4’30” at oral temperature. These times may vary based on storage conditions, temperature, humidity, and age of product.

Yes. If stored in a cooler, allow the product to reach room temperature prior to use.

Ambient temperatures greater than 25°C (77°F) may reduce shelf life.

Yes. Do not allow the pastes to dry out. Store with cap securely attached to the syringe. Leaving a used mixing tip on the syringe as a cap until the next application may result in evaporation and drying of the paste (not recommended).

With Nexus Technology’s proprietary redox initiator system, Nexus RMGI provides users with optimal gel state, predictable gel-set times and optional tack-curing, which ensure consistent cleanup each and every time.

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.

With Nexus Technology’s proprietary redox initiator system, Nexus RMGI provides users with optimal gel-set times and optional tack-curing, which ensure consistent cleanup each and every time.

Radiopacity is measured by taking an X-ray of a dental product alongside aluminum and then comparing the X-ray absorbing power (optical density) of both X-rays. If the X-ray absorbing power for the dental product is the same as that for aluminum, then the radiopacity of the dental product is 100% of aluminum. If the X-ray absorbing power for the dental product is 2 times as strong as that for aluminum, then the radiopacity of the dental product is 200% of aluminum. Dentin has a radiopacity of 100% of aluminum and enamel has a radiopacity slightly less than 200% of aluminum. To be called radiopaque, the radiopacity of the cement must be equal to or greater than that of dentin (≥ 100%). Generally, a cement with a radiopacity of less than 100% of aluminum is called radiolucent (or not radiopaque). Nexus RMGI is 217% of aluminum.

Root canal or intraoral tips can be used. The root canal tips have a narrower opening which allows for more precise dispensing of cement than an intraoral tip could provide