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Welcome to Pacific Dental Arts Milling Department Page

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. 
Be sure to visit our Document Archive. There you will find technical documents that you can download and print. The documents contain detailed information related to Zirconia milling that will be helpful for the dentist and for the dental laboratory.

Zeno Offers Unlimited Size Zirconia Substructures

Pacific Dental Arts can produce unlimited size substructures.

Pictured here is a completed 14 unit case in zirconia, along with what remains of the zirconia disc.

To help make very large cases proceed smoothly, we often mill frameworks out of durable plastic for try-in prior to milling the zirconia framework. Zirconia frameworks are incredibly strong, but cannot be soldered or rejoined, so we recommend milled plastic try-ins for long span bridgework

No Case Limitations

By using Pacific Dental Arts, you will never have to say, “It can’t be done”, again. 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
Zeno Is The Strongest CAD/CAM Zirconia - at 1300 MPa 

Employing the latest technology and space materials, Pacific Dental Arts can offer you restorations with unsurpassed strength, fit and esthetics anywhere in the mouth – anterior and posterior crowns and up to 14 unit bridges. 
The combination of proven zirconia frameworks (with a flexural strength of 1300 MPa) and new generation veneering ceramics, results in a whole new range of restorative possibilities for the clients who rely on you.

Zeno Milling Blanks - Various Sizes & Materials
Including New Translucent Zirconia
(sometime referred to as discs, blanks and even pucks)
Large 98mm wide milling blanks are available in various material too,
including NEW Transclucent Zirconia (2010).

ZENO® Zr / ZENO® TRANSLUCENT: Zirconium dioxide
ZENO® Zr / ZENO® Zr B2: Zirconium dioxide
ZENO® Zreco / ZENO® Zreco B2: Zirconium dioxide
ZENO® Al eco Disc: Ceramic 
ZENO® NP Discs: CrCo alloy
ZENO® Ti Disc: Titanium 
ZENO® Ti pur Disc: Titanium
ZENO® PMMA A3 / B1 Disc: Acrylic (temporaries) 
ZENO® PMMA cast Discs: Plastic (for traditional PFM casting and try-in) 
ZENO® Wax Disc: Wax milling (for casting)

You Can Skip the Wax-up and Casting Process Entirely
Zirconia cores and frameworks simplify your laboratory processes.
You trim the models and apply the finish (veneering) porcelains, and that's it! You skip the wax-up and casting process entirely. 

The process is listed below.
  • Lab: Model is poured and trimmed.
  • PDA: We use a laser scanner to produce a 3D computer image (computer model). Laboratories that have or produce 3D data can contact us for transmission details.
  • PDA: The Computer Design Stage: The zirconia crowns and bridgework are designed by the specially trained technologists aided by dedicated software.
  • PDA: The Milling Stage: The information is sent to the milling machine to produce the zirconia crowns and bridgework
  • PDA: The Zeno framework is milled. The work is then placed into a high temperature furnace for final sintering.
  • Lab: The crown or bridge is completed with veneering porcelain
Milled Plastic FrameworksTry-In (for verification)
Means Casting Is Always An Option

PDA can mill various materials, including strong transparent plastic that is perfect for model and in-vitro try-in. We advise plastic try-in verification on all long span restorations to avoid time consuming remakes. When the plastic try-in seats well, we confidently proceed with creating the milled framework.
In cases where plastic frameworks must be segmented to fit, the dentist can duralay the framework into position.
The plastic framework can then be confidently invested just like any wax-up and you can proceed with casting if you choose. 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 withstand pressures up to 1300 MPa. For this reason a standard PFM preparation is all that is usually necessary.
Brief crown prep details are:
  • Anatomical in design.....restore 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 Framework

The tooth preparation for bridgework is similar to that for standard PFM crown as indicated in the crown prep illustration above.
Special attention should be given to the pontic connectors which must be 9 sq. mm.

Bruxism contraindicates all-ceramic restorations

Visit our document archive for related documents including; Zeno Prep Guide For Dentists.