It depends on the type of restoration. We can use a laser for small cavities without any anesthesia, and fill it with composite tooth colored filling material. We can also use the CEREC to create a porcelain restoaration in one appointment (Inlays, Onlays, crowns and veneers).
Either way of making the restorations (either using the laser or high speed or electric handpieces), your procedure should be pain-free after anesthetic if it is needed.

Charles F. Pike