Immediate dentine sealing and adhesive cementation of a ceramic crown

Applying a dentine bonding agent to freshly cut dentine at the time of tooth preparation and prior to impression taking is referred to as immediate dentine sealing (IDS)^1,2

The value of this technique is that:

In this technique tip a maxillary left first molar was prepared for a silica-based crown, which was adhesively cemented using the IDS technique. The tooth was of reduced clinical height and an adhesively retained restoration was selected to improve retention.

Following tooth preparation, significant areas of exposed dentine are generated. The tooth stump is etched for 15 seconds with 32% phosphoric acid. Using a 3-step etch-rinse adhesive system, primer is then applied and evaporated for 90 seconds using an aspirator, after which adhesive is applied and polymerized. To ensure curing of the oxygen inhibited layer, glycerine is applied and the tooth is re-polymerized to:

Then an impression is recorded and the restoration is fabricated (Figure 1).