ZR NuSmile Single zirconia crown in any size.

Includes 1 NuSmile ZR zirconia crown in any size.

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

What are NuSmile ZR crowns made of?

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

Y-TZP Zirconia Ceramic – properties

High crush resistance (similar to steel)

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

Fine-grained structure - Zirconium oxide crystals form fine grains of 0.2-0.5 microns in size. 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 - Can be used in restorations adjacent to gold, steel, and pressed porcelain. Does not cause allergic reactions. Additionally, patients can be safely diagnosed using MRI scans.

Low tendency for bacterial plaque accumulation

Good insulator - Lack of thermal conductivity also means no tooth hypersensitivity!

Low self-weight - Zirconia is a light material compared to precious 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.

Fire resistance - The melting point of zirconia is 2700 degrees C.

Relative corrosion resistance - Easily covered with a protective layer of oxides that prevent further oxidation. No gingival discoloration effect.

Low ability to absorb ionizing radiation

Disinfection and sterilization

Acceptable methods include cold sterilization, autoclave sterilization, 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 do not contaminate the internal surface of zirconia crowns. For this reason, NuSmile ZR Try-In crowns are included in the kits for use during try-in (trial fit) 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 contamination of the internal surface of the NuSmile ZR crown occurs, 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 internal surface of the crown with Ivoclean.

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

Completely fill the crown so that there are no empty spaces during placement. If pulp treatment has been performed using eugenol-based material placed in the pulp chamber, the eugenol-based material should be covered with pure glass ionomer before cementing, unless GI was used for cementing.

The NuSmile ZR crown should be passively fitted and held in place until the cement sets by itself or is light-cured.

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

NuSmile ZR adjustment burs can be used for circumferential reduction and margin seating of the crown. It is important to use light touch and a continuous stream of water. NuSmile ZR crown polishing tools should be used to restore a smooth crown surface after any adjustments.

What is the gingival reaction to NuSmile ZR crowns?

Gingival reaction is excellent due to the anatomically correct contours and high biocompatibility of NuSmile ZR.

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