We are always looking for new ways to be a technical resource to you in your daily practice, and to that end, we will be constantly updating the technical FAQ list below as new questions come in to our lab from Doctors that are working on patients cases and need help/assistance/advice in order to successfully complete the case.

If you have a specific technical question that you need answered, scroll down to our Q&A form where you can submit.

We need your help in building out this FAQ section to be a robust technical tool that will help and inform your colleagues on cases who may find themselves with the same questions:

Q:When doing a crown to fit an existing partial, what is the best way to impress the clasp without sending the partial?

There are two options to consider (Option 1 is our preferred method but both work well).

  • Option 1:
    • After the crown preparation, take the final impression with the partial in place. Remove the partial from the impression and return it to the patient. We will replicate the partial portion of the impression with a separate material while we pour the rest of the impression in stone.
  • Option 2:
    • After the crown preparation, place the partial in place and squeeze blue mouse bite material around the adjacent teeth and clasps, let it set up, and send to the lab.*

*Keep in mind that you need to separate this and mark it so that the lab does not confuse it for a bite.

Q:When doing a tetracycline stained feldspathic porcelain case, do I need to cement with a whiter cement to insure the stump shade is blocked out?

It is not necessary to cement with white cement when placing veneers on tetracycline stained teeth unless otherwise decided by the dentist and the technician.  The lab takes into account the stump shade and blocks out using specific formulas for opacity.

Also check out the material Renamel pink opaque fabricated by Cosmedent,  Inc. This material neutralizes dark stump shades. Visit Cosmedent’s website for further information on this product at

Q:How do you suggest taking a bite when preparing a full arch?

While each dentist has been trained differently on occlusal theory, the main idea here is how to preserve the bite of your patient while preparing the full arch.

First take a full arch preoperative bite; this allows you to be sure the patient is biting down properly and gives you something to refer to throughout the process. You will probably prep one quadrant at a time; as you finish preparing each quadrant, you will reline your original bite over the preparations until you have made your way around the arch.  

Q:What type of photos would you like with large anterior esthetic cases?

Digital photography has changed the way the doctor and lab communicate in a very positive way; photos have become crucial in the success of esthetic cases. The following list is a helpful guide to follow, but double check with your technician depending on the specific case:

For Study Models and Treatment Planning:

  • Full face with smile
  • Profile left and right with smile
  • Lips at rest

With Temps:

  • Full face with smile
  • Profile left and right with smile
  • Lips at rest

Of Preparations:

  • With shade tab to show color of stump shade

Q:For single anterior cases, what type of shade information does the lab need?

If possible, do your own sketch of the patient’s shade including any of the characterizations or translucencies you can see.

Next, photograph the adjacent tooth we are trying to match using the shades you choose for the shade sketch.

Try to level the shade tab and the tooth so that any photographs taken have the flash hitting the same portion of the tooth.

Q:What is the best combination of materials for veneer and bridge and crown cases?

The following materials combine well for veneer and bridge cases:

  • For higher value whiter shades, use the following combination: feldspahtic veneers with Lava Bridge.
  • For mixed implant and veneer cases, or cases where a shoulder or champher margin preparation is not ideal, use the following  combination: feldspathic veneers with porcelain fused to gold bridge.
  • For lower value cases, use the following combination: press and cut back emax veneers and bridge.

When executing combination cases with crowns and veneers, it is more effective to keep everything the same material.

For crowns and veneers, follow these combinations:

  • Feldspathic veneers and feldspathic porcelain crowns
  • Emax veneers and emax crowns
  • Empress veneers and empress crowns
  • Feldspathic veneers and lava crowns
  • Feldspathic veneers and pfg crowns

*Emax and empress should not be combined with feldspathic as they are different porcelains and while the shade may be the same, the metamerism will make the materials appear to look different.

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