BIOS
Michael Skramstad, DDS, is a 2000 graduate of the University of Minnesota School of Dentistry. An alpha/beta tester for Sirona Dental Systems and a product consultant for multiple dental
companies, he is also a certified advanced CEREC trainer and has lectured internationally on technology, implantology and digital dentistry. Dr. Skramstad is a faculty member at Spear
Education and cerecdoctors.com, a nationally renowned website and continuing education center in Scottsdale, Ariz. He also maintains a successful restorative practice in Orono, Minn.
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ZIRCONIA RESTORATIONS MINUTE BY MINUTE
As an early tester of CEREC Zirconia, Dr. Clark Brown (Implant Dentistry, Melbourne, Fla., featured on previous page) found he could do CEREC Zirconia restorations in 90 minutes. But how does
that break down, exactly? Dr. Michael Skramstad of Orono Dental Care in Orono, Minn., has timed the process down to the minute. Let’s take a look at the numbers.
START TIME: 9:30 A.M.
9:30 A.M.
Anesthesia (articaine) administered | 6 minutes
9:36 a.m.
Pre-imaging of the prep arch, cutting out the tooth to be prepared, the opposing dentition, and the buccal bite | 5 minutes
9:41 a.m.
Preparation of the tooth for a routine crown | 15 minutes
9:56 a.m.
Tooth isolation via packing retraction cord or using a laser to isolate the tissue and preparation | 3 minutes
9:59 a.m.
Imaging the preparation and allowing the construction of the models to the model phase | 3 minutes
10:02 a.m.
Designing a full-coverage crown using biogeneric process | 8 minutes
10:10 a.m.
Milling the restoration using regular milling (faster times possible with fast milling) | 16 minutes
10:26 a.m.
Removing the sprue | 3 minutes
10:29 a.m.
Sintering the zirconia restoration on the dry cycle | 16 minutes
10:45 a.m.
Short cooling time – most of the cooling is built into the zirconia sintering process | 1 minute
10:46 a.m.
The restoration is polished | 4 minutes
10:50 a.m.
The zirconia restoration is mounted on a zirconia pin and glazed using Sirona SpeedGlaze | 5 minutes
10:55 a.m.
The zirconia restoration is run on a glazing cycle (optional, as only zirconia is able to be polished) | 9 minutes
11:04 a.m.
Short cooling time – most of the cooling is built into the zirconia glazing cycle | 1 minute
11:05 a.m.
Conventionally cement the restoration using a resin modified glass ionomer | 5 minutes
11:10 a.m.
Clean-up time | 2 minutes
FINISH TIME: 11:12 A.M.
TOTAL ZIRCONIA RESTORATION TIME: 102 MINUTES, INCLUDING OPTIONAL STEPS
