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All NuSmile BioCem kits come with single-use of low-waste automix tips (25 for a 5mL syringe kit and 15 for a 2.5mL syringe kit). Additional automix tips can be purchased separately. Using automix tips is the most efficient, effective and accurate way to mix. There is also a cannula style tip available for purchase.
If working on multiple restorations in a single sitting, a single automix tip can be used to load multiple crowns if done all at the same time. Note, however, that all the crowns must then be seated within 60 seconds, so typically it’s advisable to load only a few crowns (2-4) with cement at any given time.
It’s not likely. There is a small v-shaped groove on the side of the syringe and also on the side of the automix tip. This is an alignment marker. Line up the two v-shaped grooves, then press the automix tip down to the base of the syringe (this should press down easily), and finally twist the automix tip collar to lock the tip onto the syringe.
Yes. You should save the cap and reuse it every time. There is a small v-shaped groove on the side of the syringe and also on the side of the cap. This is an alignment marker. Line up the two v-shaped grooves, then press the cap down to the base of the syringe, then twist the cap to lock the cap onto the syringe.
If you lose the cap you can simply leave the automix tip on the syringe. The cement will cure in the tip and form a seal to preserve the cement in the syringe.
Not typically. NuSmile BioCem will bond to the tooth directly, no etching or priming is required. If the prepared tooth is severely tapered (>15°) or very short (<4mm) it may be advisable to create mechanical undercuts or horizontal grooves in the prepared tooth prior to cementing to provide more surface area and some mechanical retention. If there is very little tooth structure left, using an acid etchant and bonding agent on the tooth prior to cementation may achieve a better bond to the tooth.
NuSmile BioCem is a dual-cure cement, meaning it has both a self-curing mechanism and a light-curing mechanism. The cement will set using the self-curing mechanism only (no light cure), but cementation is accelerated with the use of a curing light. This makes NuSmile BioCem the optimal cement for use in cementing either stainless steel, pre-veneered stainless steel or zirconia crowns.
It’s "CemBiotic™", meaning NuSmile BioCem releases beneficial ionic species (phosphate, calcium and fluoride), while also forming hydroxyapatite available to integrate with and replenish tooth structure. It’s also biocompatible, containing no HEMA, BIS-GMA, BPA or BPA derivatives.
Self-set cure time (self-curing) is 2-3 minutes depending on moisture conditions and temperature in the mouth. Light cure through zirconia is 40 seconds or less depending on the thickness of the cement between the crown and the tooth (20 seconds on both buccal and occlusal of the crown). NuSmile ZR crowns ultra-thin walls allow for maximum light cure. Maximum curing light penetration to initiate light cure is 4mm.
No, the tooth should NOT be desiccated. NuSmile BioCem is a hydrophilic (moisture loving) cement. The tooth should be dry but not chalky in appearance. There should be no pooling of water, saliva or blood. Removing excess/pooled moisture from the tooth with a cotton pellet and then drying with compressed air is sufficient. An overly wet tooth surface will result in decreased bond strength.
Pressure, tissue infiltration or a hemostatic agent may be used to control gingival bleeding prior to cementation. The most commonly used agents, however, are peroxide based, and can interfere with the cement-to-tooth bond. If a hemostatic agent is used, thoroughly rinse with water to remove excess hemostatic agent, then dry before cementing the crown.
Clinicians may sterilize the dispenser by autoclave (134 °C / 3 min.).
NuSmile BioCem is NOT compatible with eugenol. If pulpal therapy has been performed and a eugenol based material placed, cover the eugenol based material with a pure glass ionomer before cementation.
No. NuSmile BioCem does not contain HEMA, Bis-GMA, BPA or BPA derivatives.
Yes, for stainless steel and pre-veneered (NuSmile Signature) crowns you would use the crown to test the fit. If the crown is contaminated with blood or saliva it should be simply water rinsed and air dried before cementation. For zirconia (NuSmile ZR) crowns scientific studies have shown that it is very important that saliva or blood does not contaminate the internal surface of the crown. For this reason, it is recommended to use NuSmile Try-In crowns during trial fitting to avoid saliva or blood contamination of the actual NuSmile ZR crown being used. The NuSmile Try-In crowns are precision manufactured to be identical in size and shape to NuSmile ZR crowns and can be used and then autoclaved for reuse. If using zirconia crowns where Try-In crowns are not available, such that contamination of the internal zirconia surface does occur, one of two processes should be undertaken; either clean the inner surface of crown with Ivoclean according to manufacturer’s instructions prior to cementation (Mfgr: Ivoclar Vivadent;www.ivoclarvivadent.com), or sandblast the inside of the crown with pure aluminum oxide.
NuSmile BioCem’s shelf-life is two years from manufacturing date. The expiration date is printed on the syringe.
There is a dispenser available for the 5mL syringe, which is helpful in preventing hand fatigue when the dentist is seating a large number of crowns in one sitting or day. Some clinicians feel it allows them to easily and accurately control dispensing of the cement. The dispenser is recommended when using the cannula tips. There is no other special mixing equipment needed.
NuSmile BioCem should be stored in a cool-dry place. A typical air-conditioned space is adequate. Refrigeration is reccommended to ensure optimal product performance.
