Method of protecting cooling-fluid lines

摘要

In dental handpiece arrangements (1) in which a coolant mixture (3) is produced from a cooling-fluid and a gas and in which a back-suction device (6) is arranged in the cooling-fluid line (5), penetration of germs into the cooling-fluid lines (5) is to be prevented without any additional components. For this purpose, the invention proposes to maintain the gas stream from the gas line (4) with constant pressure without interruption over a predetermined period of time when the coolant mixture (3) is switched off. <IMAGE>