Zirconia Full Contour
This material is great option for metal free posterior restorations. Aesthetics is restricted as there is no porcelain build up, stain and glaze only. With a digital impression you have the option of only 5 working day turn around.
| Strength | Aesthetics |
|---|---|
| +++ | ++ |
Suitable for:
Crown
Inlay/Onlay
Cantilever Bridge
Maryland Bridge
What to send
Traditional case
- Full Arch Silicone impression with wash for working model
- Alginate impression for opposing
- Silicone or wax bite
- Completed lab prescription form
Digital case
Digital impression and completed lab prescription form.
Zirconia Dental Crowns and Bridges
Zirconia dioxide became a popular material for CAD/CAM crowns in 2010, after initially being used for dental implants and endodontic posts. Zirconia is highly durable, resistant to wear, and difficult to crack, but it requires more aggressive reduction during crown preparation than Emax. The crown is cemented using a glass ionomer resin dental cement for mechanical retention.
However, Zirconia has one major drawback in that it lacks the natural, life like appearance due to its opaque nature. Manufacturers have addressed this by developing a translucent version of Zirconia that mimics the translucence of natural teeth. While Zirconia has been in use for a limited time, there are no long-term studies on its longevity, meaning no one knows how long a Zirconia crown will last before needing replacement.
Why choose Zirconia
Zirconia is highly resistant to wear and can withstand the pressure of bruxism or a heavy bite, making it a suitable material for patients who clench their teeth frequently. It is more durable than Emax, which cannot withstand the same level of stress. The translucent version of Zirconia, created with an altered chemical formulation, is also highly resistant to wear, surpassing Emax in this regard.
It is possible that the choice of crown material may change in the future. Dental manufacturers are constantly researching and striving to enhance their products. It is conceivable that Zirconia’s aesthetic properties could be improved to the point where it surpasses Emax. The future is unpredictable, and it’s impossible to know what advancements may come about.
Other Crown and Bridge extras:
- Pink Porcelain
- Shade Change
- Use of Facebow in Lab
- Post and core in one piece
- Separate pin for addition root in post and core
- Zirconia post and core
- Mask post and core with white
- Metal substructure for temporary units
- Wire for temporary bridge
- Wax up
- Rest and milled shoulder for future frame
- Metal key key way / Dove tail
- Zirconia key key way / Dove tail
- Porcelain butt margin
- Metal margin all around
- Metal backing
- No metal showing
- Fit crown under denture
- Borrowing Facebow/Articulator
- Shade match to picture or old crown
Guide for Full Ceramic preparations
Anterior crown
Posterior crown
Veneers
Onlay / Inlay
Partial crown
Instructions for anterior cases
Manage the expectation of your patient by making a wax up and requesting a stent over the wax up to be able to base your temporaries on the wax up. Send us an impressions of the temporaries and tell us what you would like to copy and what you would like to improve.
E.MAX
Contraindications:
- very deep subgingival preparations
- patients with severely reduced residual dentition
- parafunctions, e.g. bruxism
- provisional insertion/trial wear period
- bridges with a pontic beyond 5’s or bigger then 9mm
- cantilever bridges
- more then 3 unit bridges
- adjustments without polishing (please use appropriate burs only)
- always indicate if there is strong discolourations on the die
- don’t make sharp corner preparations
- for inlays/onlays the preparation margins must not be located on centric antagonist contacts
ZIRCONIA
Contraindications:
- provisional insertion/trial wear period
- adjustments without polishing (please use appropriate burs only)
- always indicate if there is strong discolourations on the die
- don’t make sharp corner preparations
- for veneer cases give us a “wrap around the incisal edge”
- check bonding procedures, and repeat these regardless of lab procedures
- wings are charged as unit
