Tooth enamel in children is very thin that?s why decay can easily destroy it and penetrate in the tooth cavity. In case of medium or deep caries Pedodontists in Delaware will open a cavity using a dental drill. Damaged dentin (inner layer of the tooth) is completely cleaned out, after which the hole will be covered with preparation containing calcium for tooth to be able to get this essential element. On top of the tooth is set temporary filling and calcium will promote the formation of so-called secondary dentin, for strengthening and thickening of the bottom of the cavity. In this case, drill will work at the minimum speed that the treatment was painless for the child.