Refreshing Tooth for Bonding of Dental Onlay

As dentists, we often see inlays, onlays, and crowns in patient mounts that unfortunately fail prematurely. Some weak links include improper bonding methods and the lack of treating the tooth surface and the porcelain for optimal bonding.

The most ideal environment for tooth bonding, be it for a filling, a crown, or inlays/onlays is by achieving proper isolation. Here we can observe the teeth isolated with a rubber dam to prevent moisture from contaminating the bonding process. Also, the tooth surface is properly cleaned and refreshed for optimal bond strengths.

This clip shows a magnified tooth surface under the dental operating microscope once a temporary is removed.

This tooth has had a margin elevation and the dentin sealed with an immediate dentinal sealing technique. A Bis-acryl temporary has been fabricated and cemented with Durelon.

Upon removal of the temporary, Durelon is found adhered to the tooth surface rather than to the intaglio surface of the temporary (as found with Temp Bond.) This is exactly what we want in order to further seal the tooth of bacterial invasion from inhabitant oral flora found in saliva.

The Durelon is removed with a piezoelectric scaler and the tooth surface is depicted at the start of this clip. Utilizing airborne particle abrasion, the tooth surface is cleaned and refreshed for optimal bonding.