The Science-Based Strength of BruxZir
Here is a quick look at the science behind the composition of BruxZir restorations.
Manufactured from a yttria-stabilized zirconia (YSZ) powder, BruxZir Solid Zirconia exhibits high strength and flexibility that surpasses the strength limitations of traditional fine ceramics. Four physical properties make it ideal for dental restorations:
- BruxZir exceeds the flexural strength of typical zirconia (up to 1,465 MPa versus 1,200+ MPa for typical zirconia).
- BruxZir exhibits three to six times the fracture toughness (aka K1C value) of typical zirconia. To better understand this concept, consider that a piece of steel or lead has high fracture toughness, whereas glass or brittle materials have a low K1C value. This property gives it high impact resistance.
- BruxZir has excellent resistance to thermal shock. This low thermal expansion means the restorations will remain very stable in the mouth.
- BruxZir exhibits translucency and, due to recent advancements, its natural white hue can be refined to a more desirable translucent shade by material scientists at the lab.
Posted by Glidewell Laboratories at 7/2/2010 6:43 AM 
Categories: Product Features, Research and Development
Tags: Development Research Zirconia Benefits
Categories: Product Features, Research and Development
Tags: Development Research Zirconia Benefits
you said，“BruxZir exhibits three to six times the fracture toughness (aka K1C value) of typical zirconia”. The typical KIC is 5-10 MPa.m1/2, so what's the KIC of Bruxzir?
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Hi Wenjie,
According to our Research and Development Team:
For the purpose of this post, we refer to "Typical Zirconia" as cubic zirconia, which is not stabilized and has a reported K1C value of 2-3. BruxZir as a partially stabilized zirconia has a K1C value of 13 (approximately six times greater).
Thanks for asking, we hope this clarifies your concern.
Customer Relations
Glidewell Laboratories.
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I am very impressed with Bruxzir. Its strength and resistance to thermal shock is enough to convince me of its worth.
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Yes, you are correct about the resilience of the BruxZir crown. Thank you very much for the comment.
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Hi,
I was wondering if you know of any dentists in the San Diego who place your bruxzir crowns? I would like to replace my older PFM Crowns on my molars with non metal crowns but I'm afraid Lava or Cerec Crowns won't be strong enough. Thank you
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Ok so I know the MPA is 1465 but that is the strongest it tested at! What is the average of the flexural strength each crown can not be 1465??? What I am asking is what is the minimum MPA it was tested at and what was the maximum MPA and what was the all around average!
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Tyler,
From over 650 BruxZir samples tested this year. We have had a high Of 1587mpa and low of 1114 mpa. The mean average was 1278 mpa.
Let me know if you need any other data.
Regards,
Robin A. Carden
Sr. Director of R&D
Glidewell Laboratories
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