Premolars and molars, because of their location, are most susceptible to damage from plaque and acids. Even with thorough brushing and flossing, these teeth are vulnerable to decay. Sealants, made of plastic resin which bonds into the depressions and grooves of the back teeth, can work as barriers to prevent decay to the chewing surfaces of the teeth. Most patients experience no pain during the procedure, and it can be performed quickly in-office.