DENTAL TEAM: Sven Jesse, Jesse & Frichtel Dental Labs and Dr. Edward Narcisi, DMD, both of Pittsburgh, PA
RESTORATIVE PROBLEM: The patient—the wife of one of the laboratory owners--had an existing all-ceramic restoration on tooth #30 that cracked (she had previously had a PFM crown that also chipped).
TREATMENT PLAN: Since functionality and esthetics were a priority, a Zirlux FC2 full contour zirconia crown was chosen. The laboratory prefers to use Zirlux FC2 because of its flexural strength and low wear against opposing dentition. The Zirlux FC2 system consists of five pre-shaded zirconia discs, 10 stains, six modifier pastes and a universal glaze. The pre-shaded discs allow you to produce all 16 VITA A-D shades as well as bleach shades with no dipping.
FABRICATION PROCESS: A custom shade was taken in the laboratory and Jesse completed a shade-mapping diagram, indicating the varying shades and characteristics in the occlusal, incisal, body and neck areas of the tooth. The case was scanned on a Dental Wings scanner and milled on the Roland DWX-50 five-axis milling machine, using shade U2 of Zirlux FC2 to match the patient's A1 shade.
After milling, Jesse polished the occlusal contacts to a smooth surface to minimize wear on opposing dentition. He then used the single-stain technique, applying shade paste A2/A3 from the Zirlux FC2 Full Contour Characterization System for the base shade and, for increased characterization, added Zirlux FC2 gray-blue modifier paste. Zirlux FC2 Glaze Paste was applied over the shade and modifier pastes to produce a final, high-gloss finish.
CONTACT: Call Zahn Dental at 800-496-9500 or visit www.zirlux.com.