Dental glazing furnace for Coloring Dental Crowns

The Dental glazing furnace is a device used in dental laboratories and small dental technology processing, specifically designed for the production and processing of dental restoration materials. It is usually used for the sintering, casting, annealing or heat treatment processes of porcelain, metal, ceramic and other dental restoration materials. The Dental glazing furnace has a small volume, is suitable for placement in laboratories or dental clinics, and is easy to operate. It is often used for the processing of individual dental restorations. 

Product Overview:

The Dental glazing furnace has a small and beautiful appearance and is very suitable for dental glazing and crown coloring. This furnace is light in weight, heats up quickly, and has accurate and reliable temperature control. The overall design adopts a sliding door, equipped with practical functions such as automatic power-off when the door is opened and buzzer alarm. Although it is small in volume, it has all the necessary functions. In addition to being able to operate quickly, it can also set the heating program in detail. In addition to dental sintering, this product can also be used for non-atmosphere sintering of small samples in the laboratory.

 Product Features:

Temperature Control: The Dental glazing furnace usually has precise temperature control, with a temperature range between 1000°C and 1200°C, suitable for the heat treatment requirements of different materials.
Rapid Heating and Cooling: The equipment has a short heating time and cooling time and can complete the sintering or treatment of dental materials in a short time, improving efficiency.
Program Setting: Equipped with multiple preset programs, the heating and holding processes can be set according to the requirements of different materials, facilitating repeated use and precise control.
Compact Design: Its small volume is suitable for use in small laboratories or dental clinics, does not occupy too much space, and can meet the processing requirements of most dental restoration materials.
High Safety: It has automatic power-off and overheating protection functions to ensure the safety of the use process.
Wide Application Range: Applicable to the sintering, casting or heat treatment of various dental materials such as metal, ceramic, and composite materials.

 Purchase Information:

If you are interested in our Dental glazing furnace, please feel free to contact us for more information and quotation.
Contact Number: +86 18516380382
Email: Jimmy@cysitech.com
Contact Person: Jimmy Hao
WeChat: +86 18516380382 

Technical Parameters: 

Main Components:

Application Areas:
Structural Ceramics: Such as ceramic knives, ceramic bearings and other high - strength, wear - resistant materials.
Dental Materials: Used for manufacturing crowns and bridges and other high - wear - resistant and corrosion - resistant materials.
Bioceramics: Zirconia ceramics has good biocompatibility and is suitable for biomedical fields, such as joint implants 

Application Case：Coloring Dental Crowns Using a Dental glazing furnace

1. Cleaning and Preparation of the Crown

Select the cobalt-chromium alloy or ceramic crown that needs coloring, ensuring that the crown's surface is free of impurities and oils.

Use a steam cleaner or ultrasonic cleaner to thoroughly clean the crown, and allow it to air dry after cleaning. 

2. Selecting and Preparing the Coloring Agent

Choose the appropriate coloring agent based on the client or patient’s requirements. Different coloring materials are suitable for different types of ceramic or metal crowns.

Prepare the coloring agent according to the manufacturer’s instructions and apply it evenly to the crown's surface using a fine brush. 

3. Placing in the Dental glazing furnace

Place the colored crown on a high-temperature-resistant tray, ensuring that the crown’s surface doesn’t touch the tray to maintain even coloring.

Insert the tray into the Dental glazing furnace and gently close the furnace door. 

4. Setting the Coloring Temperature and Time

Set the appropriate coloring temperature and sintering time based on the characteristics of the coloring agent and crown material. Typically, the coloring temperature ranges from 750°C to 900°C, depending on the specific coloring agent and material properties.

Set a suitable heating rate (generally 50-100°C per minute) and hold for 10-15 minutes to allow the coloring agent to evenly adhere and penetrate. 

5. Heating and Holding

Start the Dental glazing furnace and gradually heat to the target temperature according to the set temperature rise rate.

Maintain the target temperature for a period to ensure that the coloring agent bonds firmly to the crown’s surface and achieves the desired color effect. 

6. Cooling

After the holding period, begin the cooling process. The cooling rate should not be too rapid to avoid thermal stress that could cause cracks or deformation in the crown.

Gradually cool to room temperature using the furnace control system, then remove the crown. 

7. Quality Inspection and Post-Processing

Remove the crown from the furnace and inspect it to ensure the coloring is uniform and meets requirements.

If necessary, perform light grinding or polishing to enhance surface smoothness and overall aesthetic appearance. 

8. Glazing (Optional)

For crowns requiring higher gloss, a glaze layer can be applied. After applying a transparent glaze, place the crown back in the Dental glazing furnace and sinter at a lower temperature to bond the glaze securely to the crown’s surface.

By following these steps, a Dental glazing furnace can be used to achieve uniform coloring of dental crowns, making them closer in color to natural teeth and meeting clients' aesthetic requirements. 

Common Issues with Dental glazing furnaces: 

Uneven Application of Coloring Agent: If the coloring agent is applied unevenly or if there is uneven temperature distribution within the furnace, the crown may have inconsistent coloring, affecting its appearance. 

Oxidation: Metal crowns are prone to oxidation at high temperatures. Without proper atmosphere control, oxidation may occur, leading to a decrease in surface quality and affecting the final color. 

Cracking and Deformation: Rapid heating or cooling can cause thermal stress in the crown, resulting in cracks or deformation, especially in thin-walled or complex-shaped crowns. 

Loss of Glaze or Peeling: During glazing, if the temperature is set incorrectly or heating time is too long, the glaze may lose its shine or peel off during cooling, impacting the crown’s appearance and durability. 

Inaccurate Temperature Control: If the Dental glazing furnace’s temperature control system is imprecise, it can result in temperatures that are too high or too low, which can negatively affect coloring results and material properties. 

Precautions: 

Precise Temperature Control: Ensure accurate temperature control during the coloring or sintering process, and regularly calibrate temperature sensors. Use suitable heating and cooling rates, especially for more complex crowns. 

Atmosphere Protection: To prevent metal oxidation, use inert gases (such as argon) for atmosphere protection to keep the coloring agent and crown surface uncontaminated. Regularly check the sealing and functionality of the atmosphere control system.

Even Application of Coloring Agent: Apply the coloring agent gently and uniformly on the crown to avoid uneven thickness, ensuring consistent coloring results. 

Gradual Heating and Cooling: Set reasonable heating and cooling rates to avoid cracks or deformation caused by large temperature differences. Generally, a slower heating rate helps prevent the accumulation of internal stress. 

Regular Furnace Cleaning: Clean the furnace chamber before and after use to prevent leftover coloring agents or other residues from affecting the quality of subsequent crowns. Residual materials in the furnace chamber may impact sintering results. 

Safe Operation: Wear protective gloves and safety glasses while operating the Dental glazing furnace to prevent burns and protect against any possible gas leaks. Ensure good ventilation in the workspace. 

Temperature Control for Glazing: If glazing, strictly follow the temperature requirements of the glaze material to ensure a stable bond and ideal gloss on the crown surface. 

Regular Equipment Maintenance: Inspect the Dental glazing furnace’s electrical system, temperature control system, and heating elements, and replace any damaged or worn parts to ensure optimal performance. 

By paying attention to these common issues and precautions, users can improve the operational effectiveness of the Dental glazing furnace, ensure crowns achieve the desired color and surface quality, and extend the equipment’s lifespan.