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Troy Schmedding, DDS, shares an onlay case showcasing. restorative materials from Kuraray Noritake.
How to deliver optimal care with the right restorative essentials
In this case, a 32-year-old male presented with an existing large mesiooccluso-disto-lingual amalgam and fractured mesiobuccal cusp on tooth No. 14. The tooth was otherwise sound, so an overlay was indicated, and the tooth was conservatively prepped with minimal reduction of about 1.5 mm on the occlusal surface, and the patient was sent home with a temporary. A lab-fabricated overlay was fabricated from KATANA Zirconia STML™ from Kuraray Noritake
When the patient returned 2 weeks later, the temporary was removed.
To ensure an optimal surface for adhesion, air abrasion with the PrepStart H2O Hydro Abrasion System from Zest Dental Solutions with 27-µm aluminum oxide removed any remaining cement, biofilm, and debris from the preparation.
The preparation was next coated with a 35% phosphoric acid solution to clean any residual resin coating and aluminum oxide on the dentin. This also etched the exposed enamel.
Air abrasion was now performed on the overlay to clean up the internal substrate and create a microscopically roughened surface to enhance retention of the bonding agent.
CLEARFIL CERAMIC PRIMER PLUS from Kuraray Noritake was applied to the internal surfaces of the overlay.
PANAVIA™ V5 Tooth Primer from Kuraray Noritake was then applied to the preparation for 20 seconds and air thinned, with no need to light cure. The primer’s touch-cure technology ensured that once the resin cement was introduced to the primer, polymerization began immediately on the preparation and the restoration interface.
PANAVIA V5 resin cement from Kuraray Noritake is directly injected onto the bonding surface of the overlay.
The restoration is seated onto the prep and tack cured for 2 to 3 seconds. The overlay is held gently in place with a composite packing instrument while excess cement is peeled off with a curette and while flossing the interproximal spaces.
After cleaning and flossing, a final light cure is performed: 20 seconds on the buccal, 20 seconds on the lingual, and 20 seconds on the occlusal.
A Buccal view of the final restoration
An occlusal view of the final restoration