This form of preventive dentistry involves removing plaque and tartar from all tooth surfaces in a variety of methods, depending on the amount of plaque and tartar. Dental hygienists traditionally perform scaling by hand. However, new and advanced technology has led to more modern methods such as electric scalers. This sophisticated preventive dentistry tool allows dental cleanings to be performed more efficiently and in less time. To achieve best results, both electric and manual scaling methods are combined for dental cleanings.