DuoTron PRO Brochure

DuoTron PRO

Sintering Supplies

 

Item #

Cost

Sintering Tray

10008904

$50.00

Sintering Tray Lid

10008903

$50.00

Beads

(1mm, 200g)

10008901

$120.00

Beads

(200 grams)

10008902

$120.00

Tray Pick-up Tool

10008905

$20.00

Mode & Indication

 

Quick Mode: Single copings or small bridges

(3 to 4 unit bridges)

 

Regular Mode: Large bridge cases or 4 unit bridge cases with large pontics

(4  - 7 hours)

 

Full Contour Mode: Full contour zirconia sintering at an increased temperature.

 

Custom Mode: Build your own sintering cycle to fulfill all your zirconia needs

(LAVA, Cercon, Prismatic, etc)

Furnace insulated with high-purity fiber insulation

Efficient Air Ventilation

Accurate Temperature Control

Stackable, up to three sintering trays. Three tray

capacity allows an average of 75 units to sinter

in each cycle.

Fully programmable & capable of creating custom

cycles for different material needs

6” High Resolution LCD monitor (Touch Screen)

Compact size for a small footprint for valuable

lab space

Stainless steel construction with multiple

internal fans and uniquely designed air holes

to maintain a low exterior temperature

USB Port for

program upgrades

Features - Speed, Accuracy & Versatility

Fast Zirconia Sintering

 

  • Increases zirconia production speeds & decreases production costs
  • Cost savings and environmental friendliness
  • Compact, requiring less equipment space
  • Consistent zirconia color
  • Eliminate contamination build up

 

Heating Elements

 

MoSi2 (Molybdenum Disilicide).

 

Controlled Temperature Release

 

The sintering platform is released once the chamber is cooled to a pre-set temperature. This feature ensures that the sintered zirconia is cooled in a controlled manner and is not subject to sudden temperature changes during cooling. The pre-set platform release can be adjusted to specific laboratory needs.

 

Sintering Tray Cover

 

The use of the alumina sintering tray cover is a primary factor for preventing occasional zirconia discoloring that may otherwise occur due to the heating elements.

 

Maximum 3 Trays

 

Each round 95 mm diameter tray can hold an average of 25 single units. A maximum of 3 trays can be stacked up during one cycle time. The bottom support tray elevates the sintering trays to provide even heat and should have no zirconia units placed inside it.

 

Create Your Own Custom Graph in Addition to the Pre-set Parameters

Simply enter the temperature setting of your preferred zirconia brand, and the DuoTron Pro will create your graph automatically. You can make the heat up and cooling time shorter or longer depending on the nature of the case.

Multiple Modes, Multiple Speeds

ORIGIN Intelligence 3D Dental ScanningORIGIN Intelligence 3D Dental ScanningQuick Mode

 

Single copings or small bridges (3 to 4 unit briges)

 

Regular Mode

 

Large bridge cases or briges cases with large pontics (4 - 7 hours)

 

T1: Temperature climbs up to 1,100 C in 75 minutes. During this period, most of the gases from the zirconia binder and/or color liquids are burned out

T2: Since there is no holding period after this climb, the temperature remains at 1,100 C for zero minutes.

T3: The second stage of sintering uses a slower climb to reach the high temperature of 1,500 C in 105 minutes

T4: Holding period at 1,500 C for 70 minutes.

T5: Controlled cooling of zirconia for 230 minutes to reach the normal temperature of 25 C.

 

Example of regular 8 hour graph used by most brands of zirconia.

The graph to the right is an example of a regular 8 hour sintering mode applicable to most brands of zirconia currently available on the market.

 

Understanding the basic concepts of the graph will allow you to create any custom graph tailored to your needs for specific brands of zirconia. In addition, B&D Dental can provide preset modes for your particular brand of zirconia.

 

Full Contour Mode

 

Full contour zirconia sintering at an increased temperature (7.5 hours)

 

Full Contour Quick Mode

 

Expedited mode for single full contour (2.5 hours)

 

Long Bridge Mode

 

Large Bridge Cases Require the Extended Cycle Time and Slower Heat Up

What is your success rate for large bridge cases? The success of large bridge cases depends on factors such as the accuracy of CAM software, Pontic design, and the control of the uneven shrinkage between thin coping areas and thick/large pontic areas. In addition, it is largely dependent on whether the heat source is circumferential or simply one directional (upward only) as it is with microwave methods. Test results show that a circumferential heat source along with the extended cycle time and slower heat up has a much higher success rate for large bridge cases.

 

ORIGIN Intelligence 3D Dental Scanning

 

Custom Mode

 

Build your own sintering cycle to fulfill all your needs

Independent Tests

ORIGIN Intelligence 3D Dental ScanningComparative 3 point bending strength (MPa)(compressive stress at Maximum Comp. load)Test Results Show that Zirconia Strength is the Same, if not Higher, for DuoTron™ Fast Sintering with Super Coil Technology

 

We CAD designed 20 small zirconia plates using Solidworks software and produced STL files using proprietary CAM software to mill identical parts with evenly finished surfaces. They were 40mm long, 10mm wide, and 2mm thick. A total of 4 groups were prepared. Group A was sintered for 8 hours using a conventional coil type furnace (at 1,500 C). Group B and C were sintered using the DuoTron furnace for 8 hours (1,500 C) and 2 hours (1,500 C). Each of the sintered blocks were measured utilizing a comparative 3 point bending strength (MPa) test. Each zirconia plate is from the same disc. For comparative analysis, the conventional oven results were set to 100 and the DuoTron results were converted to their strength relative to the conventional oven. It is interesting to note that even when tested at a lower (non-recommended) heat level, the zirconia sintered on the Fast DuoTron cycle is stronger than zirconia from the conventional oven.

ORIGIN Intelligence 3D Dental Scanning

Test done by Nelson Laboratories

www.nelsonlabs.com

Offering more than 200 scientific tests

Educational Comparison

Coil Heating & Microwave Heating

 

Microwave heating is a proven technology in many industries as it increases speed and energy savings. However, when it comes to the dental industry, accuracy has proven to be an issue as demonstrated below. Tests, similar to the following, can be easily reproduced and verified by any lab. Generally, single crowns work fine for microwave sintering, but when it comes to any type of bridge cases, complete positive seating will be adversely effected.

 

B & D Dental spent considerable effort on the development of a microwave sintering oven for dental applications and worked closely with beta test laboratories, before ultimately deciding not to release the oven due to limitations of the microwave technology for dental applications. The subsequent focus on the more accurate and reliable coil technology gave birth to the DuoTon sintering oven.

Test 1

 

We CAD designed 10 small zirconia plates using Solidworks software and produced STL files to mill identical parts with evenly finished surfaces. They were 40mm long, 10mm wide, and 2mm thick. Two hour sintering was applied to 5 pieces each using the Coil Method and Microwave Method to see the effect of fast sintering. The DuoTron was used for the coil sintering tests and one of the commercially available microwave ovens developed for sintering of dental zirconia was used for the others.

 

ORIGIN Intelligence 3D Dental Scanning

 

Result: Sintering was successfully finished for both methods. The plates sintered in the DuoTron oven maintained a uniform and consistent shape, while the plates in the microwave oven came out bent with irregular and inconsistent forms.

 

Test 2

 

A four-unit posterior bridge was designed with the 3shape CAD software and two Identical bridges were milled from the file out of one 98mm disc. The material was iso-statically pressed zirconia. This material is regarded to be one of the highest quality and consistent materials available in the market.

 

ORIGIN Intelligence 3D Dental Scanning

 

Result: After duplicating the test 5 times, the following results were observed. the Bridge sintered with the coil method showed perfect seating for each individual die as well as the bridge framework as a whole. The bridge sintered in the microwave, however, had extremely open margins. Die #28 seated ok individually, with #29 not seating well at all, and #31 was quite distorted. Overall, the relationship of the framework #29 - 31 does not correspond well with the stone model/dies. This is in line with the uneven shrinkage of the zirconia found in test 1 above. It is noticeable that the pontic area (a relatively large mass of material) affects the seating negatively due to the distortion from the microwave sintering method.

Conclusion

 

When sintering zirconia, especially in the case of bridges (with pontics - large masses) the heat source must be multi-directional and must be able to provide consistent and balanced heat.

Technical Information

• Maximum Working Temp: 1,600˚ C (2,912 ˚F)

Size (Outside) : 72 cm (H) X 30 cm (W) X 46 cm (D) (28.4' (H) X 11.8' (W) X 18.1' (D))

Weight: 45 kg (99 Lbs)

Oven power: 2kW

Electricity Power: 220 Volts

Max. Current: 30 Amps

Fuse: 30 Amps

Frequency: 60 Hz

Capacity: Max 60 copings per cycle time (average 25 copings (single crowns) X 3 trays)

Outer diameter of the sintering tray: 95 mm. (inner diameter: 84mm)

Furnace chamber insulated with high-purity fiber insulation

Table top construction

Fully programmable & Capable of creating custom cycles for different material needs

High-tech touch pad screen

Free software upgrades through USB port

2 year manufacturer's warranty