3D printing in dentistry on the example of NextDent

Spurred by accelerated technological advances, the world is changing faster than ever. One of the most dynamic areas in these changes was 3D printing, and one of the most appropriate uses for it in medicine is dentistry. It is in dentistry that the most critical are not only the speed and accuracy of 3D printing, but also the special properties of materials for it, such as safety, biocompatibility, compliance with strict medical parameters. The properties of the latest 3D-printed materials for dentistry, we will discuss in this review.

For example, let's take the products of NextDent BV - a Dutch company, selected in 2012 from Vertex-Dental BV, which at that time has been successfully engaged in dental materials for more than 76 years. Medical institutions of the Netherlands and Germany take part in the development of NextDent materials, and all products undergo strict control and certification. One can hardly find a more suitable example.


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1. NextDent Base

Printing temporary bases dentures.



NextDent Base is a class IIa biocompatible material suitable for printing all types of denture bases. This material has low shrinkage compared to standard materials for dentures, which leads to an excellent fit of prosthetic bases. The small amount of residual monomer remaining after further processing makes this material more biocompatible.



NextDent 3D dental materials are supplied in 1000 ml containers.

Specifications:

• Color: shades of pink
• Brookfield viscosity at 23 ° C: 1.0 - 1.5 Pa · s
• Flexural strength: ≥ 85 MPa
• Flexural modulus: ≥ 2,100 MPa
• Water absorption: ≤ 32 µg / mm3
• Water solubility: ≤ 1.6 µg / mm 3
• The amount of residual monomer: ≤ 1%
• Shore hardness: D 80 - 90

2. NextDent SG (Surgical Guide)

Design and print high-precision transparent surgical templates.



NextDent SG is a class I biocompatible certified material designed for printing surgical patterns (guides for more accurate drilling and quicker surgery). The high accuracy of the material - the constancy of the preservation of exact dimensions and transparency - allows precise positioning of the drill and other surgical instruments during the work of the dentist.

NextDent SG is resistant to disinfectants. In addition, this material can be sterilized using gamma rays and an autoclave. Using an autoclave does not affect dimensional stability, so NextDent SG can be used in any dental office.



Specifications:

• Color: translucent orange
• Brookfield viscosity at 23 ° C: 1.1 - 1.6 Pa · s
• Flexural Strength: ≥ 80 MPa
• Flexural Modulus: ≥ 2,000 MPa
• Sterilization at 134 ° C: Maximum - 5 min.
• Shore hardness: D 80 - 90

3. NextDent C & B

Biocompatible printed material for bridges and crowns.



NextDent C & B is a class IIa biocompatible material for printing crowns and bridges (for 1-3 teeth). The material properties, combined with its abrasion resistance, make NextDent C & B as suitable as possible. Products from NextDent C & B can be fixed with dental cement.



Specifications:

• Color: different
• Brookfield viscosity at 23 ° : 0.9 - 1.4 Pa · s
• Flexural strength: ≥ 85 MPa
• Flexural modulus: ≥ 2,100 MPa
• Water absorption: ≤ 30 µg / mm3
• Water solubility: ≤ 5 µg / mm3
• Shore hardness: D 80 - 90

4. NextDent C & B MFH (microfilled hybrid material)

Wide variation of color and translucency.



NextDent C & B MFH is a Class IIa biocompatible material designed for printing medium crowns and bridges. A balanced combination of inorganic fillers and resins gives the material high strength and wear resistance.

The material is easy to process and polish, products can be painted with all types of used composite dye sets. Thanks to the perfect balance between opacity and translucency, the printed crown is visually indistinguishable from living teeth.



Specifications:

• Color: different
• Brookfield viscosity at 23 ° : 0.8 - 1.3 Pa · s
• Flexural Strength: ≥ 100 MPa
• Flexural modulus: ≥ 2.400 MPa
• Water absorption: ≤ 30 µg / mm3
• Water solubility: ≤ 5 µg / mm3
• Load intensity factor: ≥ 1.5 MPa 1/2
• Durability: ≥ 7,000 J / m2

5. NextDent Orth Clear

Aesthetic 3D printing material.



NextDent Ortho Clear is another class IIa biocompatible material for all types of dental orthoses and aligners. It is transparent and almost invisible when used daily by the patient. This material for 3D printing is characterized by high bending and impact resistance, as well as wear resistance. Suitable for printers with a wavelength of 365-385 nm.



Specifications:

• Color: transparent
• Brookfield viscosity at 23 ° : 0.8 - 1.3 Pa · s
• Flexural Strength: Unlimited
• Flexural modulus: ≥ 1,300 MPa
• Water absorption: ≤ 65 µg / mm3
• Water solubility: ≤ 5 µg / mm3
• Load intensity factor: ≥ 1.1 MPa 1/2
• Durability: ≥ 6,000 J / m2
• Shore hardness: D 80 - 90

6. NextDent Ortho IBT

Flexible material for use in orthodontics.



NextDent Ortho IBT is a first-class biocompatible certified material for orthodontic use - creating trays for positioning. Using appropriate software, the dentist can plan the exact location and form of braces for various corrective actions.

Due to the flexibility of the characteristics of printed products, an orthodontist can easily place all the brackets at once, saving time, his and his patient.



Specifications:

• Color: transparent
• Brookfield viscosity at 23 ° C: 1.1 - 1.6 Pa · s
• Tensile elasticity: 12 - 18%
• Shore hardness: A 80 - 90

7. NextDent Ortho Rigid

Easy design and 3D printing of orthoses.



NextDent Ortho Rigid is a Class IIa biocompatible material that is designed for digital fabrication of caps and orthoses. In combination with the appropriate software, it allows you to easily design and print these products, bypassing additional post-printing processes.



Specifications:

• Color: transparent blue
• Brookfield viscosity at 23 ° C: 0.8 - 1.3 Pa · s
• Flexural strength: ≥ 75 MPa
• Flexural modulus: ≥ 1,800 MPa
• Load intensity factor: ≥ 0.9 MPa / 2
• Water absorption: ≤ 32 µg / mm3
• Water solubility: ≤ 5 µg / mm3
• Durability: ≥ 3,000 J / m2
• Shore hardness: D 80 - 90

8. NextDent Model

High-precision dental models.



NextDent Model is designed for printing detailed master models that require high accuracy. The models accurately convey all the nuances of the location and shape of the elements of the scanned jaw, thanks to color and opacity, and have the ideal surface for a dentist to get an accurate idea of ​​the object of treatment. Accurate 3D-printed models are the ideal base for more efficient tooth creation.



Specifications:

• Color: sand or beige
• Brookfield viscosity at 23 ° : 0.7 - 1.2 Pa · s
• Flexural Strength: ≥ 40 MPa
• Flexural modulus: ≥ 1,000 MPa
• Shore hardness: D 80 - 90

9.NextDent Model Ortho

For printing blanks for vacuum casting.



NextDent Model Ortho - material for printing models used in vacuum casting. This material allows you to print faster and easier compared to other model materials, but provides slightly lower accuracy.



Specifications:

• Color: beige opaque
• Brookfield viscosity at 23 ° C: 1.0 - 1.5 Pa · s
• Flexural Strength: ≥ 40 MPa
• Flexural modulus: ≥ 1,000 MPa
• Shore hardness: D 80 - 90

10. NextDent Tray

High-quality material for 3D printing of individual impression spoons.



NextDent Tray is a first-class, biocompatible certified material designed for 3D printing of individual dental spoons. The material allows high-precision digital printing at high speed.

NextDent Tray allows you to create even the most complex forms in a few minutes. Printed forms have sufficient rigidity for further work with any type of impression material, which makes it possible to create high-quality and high-precision products.



Specifications:

• Colors: blue, pink
• Brookfield viscosity at 23 ° : 0.9 - 1.4 Pa · s
• Flexural Strength: ≥ 80 MPa
• Flexural Modulus: ≥ 2,000 MPa
• Shore hardness: D80 - 90

11. NextDent Gingiva Mask

Flexibility 3D-printed models.



NextDent Gingiva Mask is a flexible material that can be used in conjunction with a model material, for example, for partial or large gum prosthetics. It has a specific advantage in cases where more flexibility is required.



Specifications:

• Pink colour
• Brookfield viscosity at 23 ° C: 1.1 - 1.6 Pa · s
• Tensile elasticity: 15 - 25%

12. NextDent Cast

Burn-out material for 3D printing molded models.



NextDent Cast is a fully burnable metal casting material. NextDent Cast is suitable for the production of all types of dental metal alloys. Simply design, print, and use it with other recommended materials to create the mold and fill it with metal. Burning out without residue in the casting process, NextDent Cast allows you to create the most accurate metal orthodontic products and dentures.

Specifications:

• Color: Purple
• Brookfield viscosity at 23 ° C: 1.1 - 1.6 Pa · s
• Shore hardness: D 80 - 90

This, of course, is not a complete list of materials for 3D printing that can be used by dentists - something new and even more impressive is constantly being developed, and what is listed in the review is only what is already being widely used and available for purchase. All materials are supplied in 1000 ml containers, and printing is quite simple and convenient.



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