Bonded versus drilled — the difference is whether it is permanent
The old technique cut a small hole in the tooth surface and set the stone into it. That hole goes through the enamel and often reaches dentine. Enamel does not regenerate, so the damage lasts for the life of the tooth, along with a risk of sensitivity and decay at that exact spot.
The bonded technique used now removes no tooth structure. The enamel surface is conditioned with etching gel to create micro-porosity in the outermost layer — the same step used when bonding an orthodontic bracket — and the stone is fixed with light-cured adhesive. To remove it, the dentist releases the stone and polishes the surface, and the enamel is as it was.
If you are ever advised that drilling a hole will hold the stone better, go elsewhere. Bonded retention is entirely adequate for normal eating, and the price of that slightly better hold is a permanent hole in one of your front teeth.




