STEP 6 (continued)
The final crowns were cemented in the patient’s mouth and Chiha, Dr. Ayzin and the patient were extremely pleased with the results.

STEP 6

STEP 5
Chiha applied Noritake CZR (C2 chroma) external stain on the cervical area and baked the restorations, then applied Noritake CZR FL Glaze to achieve a natural appearance. He placed the units on the solid model to check the glaze and contacts.

STEP 4 (continued)
Chiha set the milled and sintered crowns on the solid model to evaluate contour and contacts; sandblasted with low-pressure, 50-micron aluminum oxide; and placed them in an ultrasonic bath to remove all the fine particles.

STEP 4

STEP 3
Chiha milled the four units using Noritake KATANA Zirconia STML A1 and the Roland DWX-50 mill. Following the manufacturer’s technical instructions, Chiha finished the restorations in the green state and then sintered them in his Mihm-Vogt sintering oven.

STEP 2
Rather than immediately fabricating the case based on the dentist’s temporaries, Chiha decided to come up with two other options: he did a traditional waxup of the four crowns and also scanned the model and designed the crowns in his exocad software (shown above). He and Dr. Ayzin then compared the conventional waxup, CAD/CAM design, and model of the temporaries so they could pick the best of the three. They ultimately chose the CAD/CAM option because they felt it offered the best esthetics and functionality.

STEP 1
Dr. Ayzin prepped the case, chose a C2 shade, provided an impression and fabricated temporaries.

Restorative Problem and Treatment Plan

A 72-year-old female patient presented with broken incisal edges on teeth #7-10. She wanted to restore the esthetics of her smile.

Jean Chiha, CDT, and Michael Ayzin, DDS, Dentistry at Its Finest, Costa Mesa, CA, decided on four Noritake KATANA Zirconia crowns for the most esthetic and functional rehabilitation possible. They chose the new KATANA Zirconia STML A1 because it makes high-end esthetics easier and more predictable. Its translucency and multi-layered features provide ease of fabrication as well as precision and durability.