1. Laboratory crafted restorations can be permanently inserted with a glass ionomer or fine grained zinc phosphate cement. Since the In-Ceram core transmits light like natural dentin, there is some capacity for shade alteration by varying the opacity of the cement (Zinc phosphate has the highest degree of opacity. Glass ionomer has a greater degree of translucency).
2. Clean tooth preparation of all residual temporary cement.
3. Seat crown with finger pressure only. Check and adjust proximal contacts if necessary.
4. If crown fails to seat, use indicating material to determine binding spots (low viscosity silicone material recommended). Place material inside the crown and re-insert crown over preparation wetted with saliva with finger pressure. Once material has set, remove crown. Binding spots are now readily identifiable, easily marked and quickly adjusted with standard diamond tools. Remove silicone residue with acetone or methyl chloride, and clean the tooth with Dentin Conditioner (GC).
5. Cement with a low viscosity mix and insure that there is an excess around the entire periphery. Maintain firm pressure until set.

Unesthetic metal-ceramic crowns 12 to 22.		Due to discoloration of the dentine, the restoration is cemented with zinc phosphate cement.		Clinical situation after cementation.

In-Ceram crowns inserted 13 to 23, cemented with glass ionomer cement since there were no discolorations in the stumps.

Reprinted with permission of Vident. In-Ceram is a registered trademark of Vita Zahnfabrik.

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