|
|
Oral Esthetics Zirconia CAD/CAM Frameworks
We would like to introduce you to some of the features and benefits of CAD/CAM Zirconia substructures, such as strength, reliability, aesthetics, biocompatibility and affordability. |
 |
Unlimited Size Zirconia Substructures
The CAD/CAM system can fabricate unlimited size substructures. Think about it!
Pictured here is a completed 14 unit case in zirconia, along with what remains of the Zirconia puck or 'blank'.
To help make such a case proceed smoothly, frameworks can also be made out of durable plastic for try-in prior to Zirconia milling.
Zirconia frameworks are incredibly strong, but cannot be soldered or rejoined, so we recommend milled plastic try-ins for long span bridgework.
That way if a try-in must be segmented, the dentist has the choice of proceeding with a traditional metal framework.
|
 |
No Case Limitations
By using Oral Esthetics zirconia frameworks, you will never have to concern yourself over bridge size.
Listed below are some of the milling possibilities.
Single copings
1x2 to 1x14 unit bridges
Cantilever bridges with rest support
Maryland bridge type design
Copings and bridges over titanium or zirconia implant abutments
Inlay bridges
|
 |
No Framework Wax-up and Casting
Zirconia cores and frameworks simplify the entire process.
The process is listed below.
Model Work: We pour and trim the model.
3D Scanning: We use a laser scanner to produce a 3D computer image (computer model)
Computer Design: The Computer Design Stage: The zirconia crowns and bridgework are designed by Oral Esthetics, aided by the computer.
Precision Milling: The Milling Stage: The information is sent to the milling machine to produce the zirconia crowns and bridgework
Sintering Stage: After zirconia is milled it is then placed into a high temperature furnace for sintering.
Veneering Porelain Detail: The crown or bridge is completed and detailed with finishing porcelain, either feldspathic or pressed.
|
 |
Milled Plastic Frameworks Try-In
Conventional Casting Is Always An Option
Various materials are millable, including strong transparent plastic that is perfect for model and in-vitro try-in, especially for long span frameworks. We can then use the same data to manufacture the framework, confident of a precision fit.
There are some cases where plastic frameworks must be segmented to fit, and the dentist can duralay the framework into position.
The plastic framework can then be confidently invested just like any wax-up and we can proceed with casting. The case can proceed as a PFM restoration. This allows for flexibility in case direction, avoiding new impressions and remakes.
|
 |
Crown Prep - Zirconia Core
Even at a thickness of .4mm zirconia cores are extremely strong and can withstand pressures up to 1300 MPa. For this reason a standard PFM preparation is all that is necessary.
Brief crown prep details are:
- Anatomical Prep Design.....restore tooth defects, cusps etc...this establishes a base for UNIFORM THICKNESS of zirconia.
- Anterior/Posterior Prep: 1.6mm labial/lingual, 2mm incisal/occlusal
- Margins: A distinct chamfer or rounded shoulder of 1mm minimum with standard 4 degree taper.
- Bruxism contraindicates all-ceramic restorations
|
 |
Bridge Prep - Zirconia Core
The tooth preparation for bridgework is similar to that for standard PFM crown.
- Framework crown/pontic connectors must be 9 sq. mm
- Bruxism containdicates all-ceramic restorations
|
|
|
