ZR NuSmile Single zirconia crown for the first primary molar in any size.

Includes 1 NuSmile ZR zirconia crown in any size.

NuSmile ZR is the latest generation of pediatric restorative technology, representing an ideal balance between art and science. Made from zirconia ceramic, NuSmile ZR offers excellent aesthetics that mimic nature, superior durability, and easy seating. NuSmile ZR and its matching Try-In crowns are part of a simple and convenient complete zirconia crown system that provides patients with the best results.

What are NuSmile ZR crowns made of?

NuSmile ZR crowns are made of high-quality Japanese monolithic Y-TZP zirconia ceramic.

Y-TZP Zirconia Ceramic – Properties

High compression resistance (similar to steel)

High fracture resistance - 2000N. Very high stress intensity factor - determines resistance to crack propagation and indicates the amount of energy needed to initiate fracture of a material sample (so-called brittle fracture).

Fine-grained structure - Zirconium oxide crystals form fine grains of 0.2-0.5 microns. Zirconia has a very low porosity coefficient - it has a very homogeneous structure. Low porosity in the tetragonal form also means that it is a non-absorbent material. High density (approx. 6g/cm3 after sintering) and lack of surface porosity translates into a reduced risk of cracking or fracture.

Biocompatibility and bio-conformity - It can be used in restorations adjacent to gold, steel, and pressed porcelain. It does not cause allergic reactions. Additionally, patients are safely diagnosed in MRI examinations.

Low tendency for bacterial plaque accumulation

Good insulator - No thermal conductivity also means no tooth hypersensitivity effect!

Low self-weight - Zirconia is a lightweight material compared to noble metals. No interaction with other dental materials.

High hardness - The hardness of zirconia is approximately 1250 Hv on the Vickers scale. For comparison, the value for gold is 200-260, for non-precious alloys 300-350, and for traditional porcelain 380.

Refractoriness - The melting point of zirconia is 2700 degrees C.

Relative corrosion resistance - It easily covers itself with a protective layer of oxides that prevent further oxidation. No gum darkening effect.

Low ability to absorb ionizing radiation

Disinfection and sterilization

Acceptable methods include cold sterilization, autoclaving, or steam sterilization according to standard sterilizer manufacturer instructions.

How to properly cement a NuSmile ZR crown?

It is very important that saliva or blood does not contaminate the inner surface of zirconia crowns. For this reason, NuSmile ZR Try-In crowns are included in the kits for use during try-in (trial fitting) to avoid saliva or blood contamination of the NuSmile ZR crown to be used. All NuSmile ZR Try-In crowns are precisely manufactured to be identical in size and shape to NuSmile ZR crowns and can be reused and autoclaved multiple times for try-in. If the inner surface of the NuSmile ZR crown becomes contaminated, one of two processes is recommended to best maintain cement retention on the crown. Sandblast the inside of the crown with pure aluminum oxide or clean the inner surface of the crown with Ivoclean.

NuSmile BioCem® Universal BioActive RMGI, Ceramir, resin cement, or other resin-modified glass ionomer cement can be used to cement NuSmile ZR crowns. Recommended product for cementing crowns in children: Fuji Plus glass ionomer cement.

Completely fill the crown so that there are no voids during seating. If pulp therapy was performed with an eugenol-based material placed in the pulp chamber, the eugenol-based material should be covered with plain glass ionomer prior to cementation, unless GI was used for cementation.

The NuSmile ZR crown should be passively seated and held in place until the cement self-cures or light-cures.

Can the NuSmile ZR crown be shortened? If so, how?

NuSmile ZR adjusting burs can be used for circumferential reduction and margin feathering. It is important to use light touch and continuous water flow. NuSmile ZR crown polishing instruments should be used to restore a smooth crown surface after any adjustments.

What is the gingival response to NuSmile ZR crowns?

Gingival response is excellent due to NuSmile ZR's anatomically correct contours and high biocompatibility.

With a properly fitted crown, a correct gingival response is expected within 7-10 days.