Ultrasonic dental treatment apparatus for treatment of tartar and/or plaque in teeth, has base element comprising connection section formed by bolt-like element and provided with two overlapping screw threads with different thread leads

摘要

The apparatus (1) has a base element (2) comprising a connection section (2.1) for producing screw connection between the base element and an article element (3) that is attachable at the base element. The connection section is formed by a bolt-like element, and has two overlapping screw threads (4) with different thread leads. The screw threads are designed as external threads, and extend over the entire bolt-like element or over entire depth of a blind hole (5) of the connection section. The blind hole has two internal threads with different thread leads.