If you have spontaneous pain (if you stay alone without stimulation), it is usually a sign of pulp involvement, and you need to do root canal treatment before filling your teeth. As for the filling fairy, they are all made of resin. The so-called nano is only a resin with a particle size less than 20 microns, and it has not really reached the nano level. As long as strict operating procedures are followed: corrosion removal, preparation, moisture isolation, edta removal, acid etching, desiccant, adhesive, coupling, cementation, adequate illumination and enamel sealing. These steps are quite a lot, and they are in place. In fact, any resin can be used, but the man-hours of these steps, to be honest, are enough for 300. ?

Before filling your teeth? After filling teeth