Hello RGR. How large are the fillings? Can they all be done with composites, or will some require an inlay, onlay, or crown? It is not a good idea to have more than two quadrants worked on in the same day. A quadrant is 1/4 of your teeth, upper right, lower right, upper left, lower left. I am assuming that the fillings are in at least three quadrants, so probably two visits to the dentist are needed, unless some need an inlay, onlay, or crown, then you might need 3 or more visits.