Dental cement is a type of dental material that can be used for different purposes. Some cements are used to restore dental work, while others are used to create original dental work. Some are permanent, while others are temporary. Dentists must make sure to follow the manufacturer's directions for each type of cement, in terms of mixing, using the correct ratios and subjecting it to the correct temperatures. There are five types of dental cement: zinc-oxide eugenol, zinc phosphate, polycarboxylate, glass ionomer and composite resin.