[Longitudinal study on the abrasion of plastic teeth in total prostheses]

After a period of two years, the abrasion rate for standard plastic lateral teeth is one-tenth of a millimeter. The abrasion rate is then one-tenth of a millimeter per year for each succeeding year. A vertical loss of approximately four-tenths of a millimeter, for example, occurs during a five-year period. The abrasion rate is not related to the position of the prosthesis. The molar region shows a lesser degree of abrasion than anterior sections of the dental arch.