Inlay and Onlay Prep: Traditional inlay and onlay prep is recommended. Taper the cavity walls 5-6 degrees to the long axis of the preparation. Do not undercut. Internal edges should be rounded. Incisal/occlusal reduction should be at least 1.0 mm below the bottom of the fissure and at least 1.5 in the area of the isthmus or cusps.

Veneer Prep: Reduction of the labial surface should be at least 0.6 mm and 0.4 mm at the gingival. The reduction of the incisal, labial-lingual angle should be 0.5 to 1.5 mm. Margins for the veneers should be in the enamel and above the gingival tissues. Create a chamfer or rounded shoulder. Proximal extensions should be made far enough into the proximal region so that margins do not show and have no proximal-gingival undercuts.

Crown Prep: Axial reduction should be at least 1.0 mm at bottom of the fissure and at least 1.5 mm in the area of the cusps with a 5-6 degree taper. Incisal/occlusal reduction should be 1.5 to 2 mm clearance in centric occlusion and all excursions. Shoulders must extend at least 0.8 mm from the lingual to the proximal contact area. Non-beveled shoulder finish lines are recommended. All line angles should be rounded and surfaces should be smooth.

Upcoming Trade Shows

Please visit Digital Dental at our booth at one of these trade shows this year.

  • Sep 8, 2018 - LMT East  - Philadelphia, PA
  • Sep 26-29, 2018 - AAID - Dallas, TX
  • Sep 28-29, 2018 - IDT - Phoenix, AZ
  • Oct 11-13, 2018 - DLOAC CAD/CAM Expo - Orange County, CA
  • Oct 31-Nov 3, 2018 - ACP - Baltimore, MD
  • Feb 21-23, 2019 - CDS Midwinter - Chicago, IL
  • Feb 22-23, 2019 - LMT Chicago - Chicago, IL
  • Mar 13-16, 2019 - AO - Washington, DC

Crystal Ultra Specs

Physical Property Measurement
 Vickers Hardness (200 p)  710 MPa **
 Modulus of Elasticity 
(Young Modulus)
 10,000 MPa **
 Flexural Strength  175 MPa **
 Compressive Strength  480-500 MPa **
 Density  1.89 g/cm3
 Chemical Solubility  1.29 μg/cm3
 Water Absorption  16.94 μg/mm3
 Water Solubility  0.04 μg/mm3
 Biocompatibility  Confirmed
 Ceramic Filler  70.02% (wt)
 Color Stability  Confirmed
 Shade Consistency  Confirmed
 Surface Finish  Smooth
 Bond Strength  27-37 MPa