Air turbine handpieces are manufactured with a wide range of alternati
ve design features which may influence their suitability for particula
r clinical procedures. In this article a general account of these feat
ures is presented and their advantages and disadvantages are discussed
. Some deficiencies in current methods of stating equipment specificat
ions are reported and suggested improvements are given. Where appropri
ate, general recommendations are made regarding handpiece selection fo
r clinical practice.