Stewart Dental Lab is now offering 100% Solid Zirconia. Mainly used to substitute for Gold Crowns and Bridges, but has shown tremendous growth for Porcelain Fused to Metal and Porcelain Fused to Zirconia replacement.

This type of crown has the monolithic feature like e.Max, but has a indestructible character.

High Translucent Zirconia
1200mPa Strength
Often called *BruxZir in other labs
*Bruxzir is a registered trademark of Glidewell Laboratories

If you would like more information please give us a call today.

www.youtube.com/watch?v=7MIjTpJpVJ4

www.youtube.com/watch?v=TrNW-_d2ORY

Plan to see many more videos in the near future.

Dental Zirconia is created into a shape by the manufacturers to work in a specific type of milling machine. Our Lab then uses CAD/CAM or other means of shaping a coping or a Full zirconia crown to fit to the die or model for the layering of ceramic glass.

One of the key benefits of using zirconia instead of metal, is the bio-compatibility in the patient. There is no metal involved so there is no allergic reaction that can be caused by the crown itself. Another benefit is the fact the crown becomes much more translucent and lifelike, unlike metal which masks out the entire tooth structure, zirconia brings out the color in the tooth and overall enhances the crown itself.

If you have not ordered a Porcelain Fused to Zirconia crown before, i urge you to try one and i guarantee you will much happier with the results than a standard PFM.

Image courtesy of Wikipedia

Minimum just for the porcelain itself, albeit for a PFM or Zirconia crown, is 1.0MM. This thickness is provided by the porcelain manufacturers themselves, many claim that you should not go below 1.5MM in porcelain, others claim 1.0MM. Porcelain Manufacturers also claim that if this thickness is not reached, their product warranty is void and that labs should void their product warranty as well since specifications have not been met.

A 2MM depth burr is recommended when cutting a PFM or Zirconia Restorations. Lots of dentist’s are concerned at first that they might cut into the pulp at this depth, but those that use it say they have not once cut it or got close.  Another handy thing to have in the practice is the use of bite guides. They are a great way to help ensure that depth cuts are to the minimum, just have the patient run through excursions and protrusions as well to ensure proper height has been established.

Porcelain Fused to Metal:
Framework minimum = 0.3MM
Porcelain minimum = 1.0MM
Total Depth Cut Minimum =1.3MM

Porcelain Fused to Zirconia:
Framework minimum = 0.4MM Anterior and 0.5MM Posterior
Porcelain minimum = 1.0MM
Total Depth Cut Minimum =1.4MM(anterior) and 1.5MM(posterior)

Gold Crown or Metal Occlusal:
Framework minimum = 0.5MM
Porcelain minimum = 1.0MM
Total Depth Cut Minimum = 0.5MM

Many new test’s now show that anything smaller than 0.5MM reduction will fail down the road. Most labs claim, which our office has as well, that you can go down to 0.3mm for a metal occlusal or gold crown and it will work. Study’s have now shown that under normal wear and tear that the patient will now chew a hole through a crown less than 0.5mm.

Dental Technician’s are really good at fudging there product to get it to work when not enough clearance is provided, but the consequences of these actions are countless amounts of remakes.

All these articles are designed to help you identify common problems that could occur in impression procedures, Impression Tips highlights an issue, discusses potential causes and offers solutions for improving impression results.

Bite Registration (pdf, 186K)
Double Bite Technique (pdf, 270K)
Surface Inhibition/Wash Slow Setting (pdf, 290K)
Tearing/Rough Surfaces (pdf, 354K)
Tight Fitting Crowns (pdf, 186K)
Tray Seating (pdf, 304K)
Voids (pdf, 436K)

Making Better Impressions – Troubleshooting Guide (pdf, 1.2MB)

When given a quad impression, the ceramist can only assume that the bite is correctly positioned, creating the excursion and protrusion. Then the ceramist must guess what the other side of the mouth might look like and create a tooth with that interpretation.

When given a full arch, the ceramist is able to duplicate with greater detail and accuracy to what is currently there. It no longer is a interpretation, but a becomes duplication of  the existing teeth.   Which in turn gives you drastically shorter seat times, a lot less chances for remakes, and overall a much happier patient which will come back to your office again and again.

So all in all, Quad impression’s will work for the fabrication of crown and bridge. But definitely be prepared to put in some chair time to get the crown to work in complete function with the patients mouth.

But the 1st choice for us lab people is a Full Arch each and every time.

• Importing Lava COS scan orders

To use Lava COS scans, perform the following steps:

1. Log into the 3M ESPE Case Manager with your credentials: https://casemanager.3m.com
2. Click the “Cases” tab at the top of the screen.
3. Type in the C.O.S. case number into the Search field.
4. Click on the case number link when you have found it.
5. Click the “Files” link at the top of the case detail page.
6. Locate the file that ends in “ULDC”.

1. Click on the ULDC file, and save locally to your computer

Not Necessary: To make the automatic mapping from the Lava COS materials, please insert the ID’s below at the external ID for the corresponding material e.g. enter COS_0 for Zirconia material

• Importing iTero scan orders

To use ITero scan, it is necessary to properly export it from the ITero lab software:

To make the automatic mapping from the Itero materials to the 3Shape materials correctly, please insert the ID’s below at the external ID for the corresponding 3Shape material e.g. enter ITERO_Zirconia:LabPreference.

We have recently lowered our price on all our Zirconia copings from $55 to $45 per unit.

Like always we don’t charge any extra hidden fees like other centers do. Just a great product and a great price to back it up with.