The inner structure of many natural teeth can vary considerably.

In some cases, where the dentin layer is very irregular, we use a brush we devised in our lab "Ubassy’s Cutting Brush". This brush has rather stiff bristles and of varying lengths. During the layering of the buccal dentin we use this bush to create irregularities. To fix these irregularities, we dry them with a hot air blower or harden them spraying some lacquer on them. It’s possible afterwards to put down in the depression the translucent or absorption mass to complete the layering.

The result after the firing is very realistic. Trick #30 Tricks and Hints Gérald Ubassy.