One of the great dilemmas facing dentists is to create esthetic smiles for patients with severe wear, or destructive habits like habitual clenching and grinding (Bruxism).
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| severe wear |
Historically, the material of choice for patients who have these conditions has been the use of cast metal. The metal used was usually gold alloy, semiprecious, or non precious alloy in crowns and bridges. These metals gave restorations great strength and wear resistance. Unfortunately, metal has horrible esthetics.
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| metal bridge |
We still measure the longevity of all other restorative materials against metal alloy. A gold crown can function more than 50 years in the mouth.
In the early to mid 20th century, acrylic and porcelain were used to hide the metal and improve the esthetics of dental crowns and bridges. The problem with these esthetic restorations is the weaker porcelain can fracture off revealing the metal below.
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| porcelain fractured off porcelain/metal bridge |
Since then not much has changed in the fabrication of restorations until the use of Dilithium Silicate marketed as Eris™ and Zirconium marketed as Lava™, and Procera® and others. These materials utilize the Dilithium Silicate or Zirconium as a base layer (core) and overlay with porcelain. Dilithium Silicate is 3 times as strong as porcelain, while Zirconium is 10 times as strong as porcelain. These were the first strong "Metal Free" restorations that were used for crowns and bridges. Since their introduction, fracturing of porcelain is still reported in bruxers as the porcelain is still weak, so we kept looking for stronger materials with good esthetics.
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| porcelain fracture off porcelain/zirconium bridge |
Through experimentation, newer shades of Dilithium Silicate and Zirconium have been developed which have acceptable esthetics. These materials are E-Max™ and Bruxzir™. Both of these materials can be milled out of a solid block of material. E-Max™can be used with the CEREC™ in office milling system,which can be placed in a single visit for single crowns and onlays. Bruxzir™ must be made in a lab and will require 2 visits. Bruxzir™ has enough strength to be used in a full arch bridge.
We have been placing E-Max™ crowns in one visit for over 2 years with no breakage.
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| E-Max™ before |
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| E-Max™ after |
We have been using the Lava™ system for several years for crowns and bridges and now will be able to offer the Bruxzir™ system as well for our more severe cases.
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| Bruxzir™ bridge before |
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| Bruxzir™ bridge after |
If you have any questions you can contact us at:
phone 815 458 2202
or Email us at info@drneal.com
You comments are welcome
Sincerely,
A Crown is used to entirely cover damaged tooth. Besides strengthening a damaged tooth, a crown can be used to improve its appearance, shape or alignment. It can also placed on top of an implant to provide a tooth-like shape and structure to function. These are made purely from porcelain or ceramic and no other material like, porcelain fused to metal or only metal like gold, etc. These crowns are highly esthetic as the material of these crowns, allows the light to pass through them .It does not absorb the light like metal does, so they are lifelike and translucent , blending with the rest of the teeth. From Past several years Smile Delhi The Dental Clinic treated their patients with great care and compassion and provides superior quality crowns
ReplyDeleteIt is a great work but i got doubt what type of material will be taken to make crowns, and what are the conditions are to be kept in order to keep safe crown. please give me some suggestions.
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The E-Max crown is a type of all-ceramic crown which is preferred for its longer lasting, aesthetic qualities. This crown and the Zirconia crown are worn due to their highly attractive appearance which ensures that they compliment the rest of your teeth. It is considered a good option for damaged, stained or poor quality teeth. This is a type of all-ceramic crown with an appealing translucent colour which is combined with extra strength and durability. This crown is made from a single block of lithium disilicate ceramic: this is a top grade material which has been harvested for its toughness, durability and opaque qualities which makes it a highly prized crown. Plus it is considered a breakthrough in dental crown technology. You get a glass ceramic crown which is tough and enduring but delicate in appearance.
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ReplyDeleteCrowning a tooth hurts so much even with the thing on, The procedure wasn’t bad just took some alive and it helped ease the pain.
ReplyDeleteThanks for the informative article. Bruxism is treated successfully at Meraki dental studio, New Delhi.
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This post was so hopefully, using full zirconia crowns are great, as long as you don't work at.
ReplyDeleteThank you for sharing information on buxzir and emax. Very informative and well articulated.
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