Types of Porcelain Dental Crowns

Types of ceramic dental crowns that are commonly available:
1. Metal ceramic
2. High-strength cores
3. Pressed-glass ceramics
4. Milled porcelain
5. Cappilary technique
6. CAD CAM

Metal ceramic crowns are the conventional and most commonly used technique. It utilizes the bond between porcelain and metal that is achieved at high temperatures. Enough space is needed from tooth prep for the opaque porcelain, dentin and enamel porcelain to create the appearance.

High strength core crown consists of 2 layers. The dental crown’s strength is derived from the inner core made from Inceram, and overlaid with conventional porcelains to improve the esthetics. Inceram is a glass and alumina material.

Fine alumina powder is applied to an absorbent refractory die and any residual pores are filled with molten glass to produce a dense, crystalline core structure. The core has high strength and elastic modulud. The high content of alumina makes it resistant to acids making adhesive bonding difficult.

Conventional metal ceramic dental crowns



Pressed-glass ceramic crowns comprise 2 layers, an inner material made from EMpress and an outer layer made from conventional porcelains. The outer layer is thinner than in hign strength core crowns. This is to improve the surface finish and characteristics. The core is made using the lost wax technique. Wax is applied to a phosphate-bonded investment, after burnt-out, leucite reinforced glass ceramic is pressed under pressure into the space.

In milled-porcelain core crowns, computer controlled technology is used to mill the coping. The ingot is made from an aluminum oxide powder. The outer surface is made from conventional porcelain. The fit is excellent. Conventional ceramic is overlaid onto the core which is responsible for the improved translucency.

Capillary technique (Captek) crown‘s basic structure is smilar to metal ceramic crowns except that the core is made from a precious metal. Captek have improved marginal fit and biocompatibility. The apperance is warmer compared to conventional PFM crowns because the yellow color from the gold core reflects the light. Captek requires less tooth reduction.

Monolithic CAD-CAM milled dental crown

In CAD CAM crowns, blocks of porcelain is cut by computer aided design/computer aided manufacturing system to produce crowns.

Conventional Metal Ceramic Dental Crown Video

For more info about Ceramic Dental Crowns, please read these articles:

Conventional Metal Ceramic Crowns – http://costdentures.com/fixed/metal-ceramic-crown/
E-Max Dental Crowns – http://costdentures.com/fixed/fixed-partial-denture-e-max/

For more information on the best possible Prosthodontic Treatment for your case, please consult your Dentist. “There is no online material nor website that can substitute for professional advice.”

Reference
[1] Owall B et al: Prosthodontics principles and management strategies. Mosby-Wolfe 1996

By:
Dentures Cost+
Dentures Cost – http://costdentures.com/

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32 Responses

  1. Dentures Inc says:

    Good job dr. Good explanation about dental crowns.

  2. Manny says:

    Nice crown. Good job dr!

  3. Dr. irenea Laping Tome says:

    Fantastic crown !

  4. Ryu Shin says:

    Please help me naman anyone who knows a very credible real orthodontist who can help me. I had a fixed bridge jacket kso nag leak kaya lumipat ako ng ibang dentista and then ginawa nyang permanent yung fixed bridge jacket pero di nya nilagyan ng metal lining kaya yung mga tinga na iistuck sa loob.Ano po ba ang mas maige yung may metal lining para wag pasukan ng tinga or yung natural looking na walang lining pero pumapasok ang tinga. Thanks.

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