Chongqing Zotion Dentistry Technology Co. Ltd

Chongqing Zotion Dentistry Technology Co. Ltd Zotion--17+ years manufactuer specialized in dentistry

What Is the Purpose of Sintering in Dentistry?
28/08/2026

What Is the Purpose of Sintering in Dentistry?

What Is the Purpose of Sintering in Dentistry?

What Happens to Zirconia During Sintering?
27/08/2026

What Happens to Zirconia During Sintering?

What Happens to Zirconia During Sintering?

What Is the Purpose of Sintering in Dentistry?
21/08/2026

What Is the Purpose of Sintering in Dentistry?

What Is the Purpose of Sintering in Dentistry?

How Does a Dental Sintering Furnace Work?
21/08/2026

How Does a Dental Sintering Furnace Work?


How Does a Dental Sintering Furnace Work?

what is a dental sintering furnace？A dental sintering furnace is a high-temperature furnace used to sinter zirconia rest...
18/08/2026

what is a dental sintering furnace？
A dental sintering furnace is a high-temperature furnace used to sinter zirconia restorations after CAD/CAM milling.

Zirconia discs used for CAD/CAM milling are supplied in a pre-sintered state. At this stage, the material has lower hardness than fully sintered zirconia, which makes it easier to mill into crowns, bridges, implant restorations, and other dental restorations.

After milling, the restoration is placed on a sintering tray and loaded into the furnace. The furnace then follows a programmed temperature cycle. The program normally includes a heating stage, a holding stage at the specified sintering temperature, and a cooling stage.

During heating, the temperature of the zirconia gradually increases. At the sintering temperature, the zirconia particles move closer together and form stronger bonds. The material becomes denser and its mechanical properties change as sintering progresses.

Shrinkage also occurs during this process. This is an important part of zirconia CAD/CAM production because the restoration is milled in a pre-sintered state and becomes smaller after firing. The shrinkage value is related to the zirconia material and its manufacturing process, and the corresponding value is normally taken into account during CAD/CAM production.

The sintering process can be illustrated as:

CAD Design → Milling → Cleaning → Sintering → Finishing → Staining/Glazing

Why Is Sintering Important?

Sintering is more than simply heating a zirconia restoration to a high temperature. The heating rate, sintering temperature, holding time, and cooling rate all form part of the thermal cycle.

For example, a single crown and a large bridge do not have the same size or thermal behavior. Different zirconia products may also have different recommended sintering programs. A high-translucency zirconia disc may use a different cycle from a conventional high-strength zirconia material.

The temperature inside the furnace is another consideration. Heating elements, chamber structure, insulation, tray position, and the number of restorations loaded in one cycle can affect the temperature distribution within the chamber.

What Happens If the Sintering Program Is Not Suitable?

The sintering program should match the instructions provided for the zirconia being processed. If the heating rate, temperature, holding time, or cooling conditions differ from the material manufacturer's recommendations, the resulting density, shrinkage, appearance, or dimensional characteristics may differ from the expected values.

For dental laboratories, this is one reason the furnace and zirconia material are normally considered together when setting up a CAD/CAM workflow.

A dental sintering furnace provides the controlled heating environment used during this stage. Temperature sensors, heating elements, insulation, the furnace chamber, and the control system work together to run the selected sintering cycle.

What Is a Dental Sintering Furnace?

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中国重庆
Jiulong

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