Improvement of training devices, called 'contra-angles', for rotary tools used in bone surgery, in particular in dental surgery.

摘要

P In a tool drive apparatus used in bone surgery, in particular in dental surgery, the liquid supply tube (7) is surrounded, between the location of the upper part (13) of the tool (6) and a stop (18) which is integral with the feed tube (7) at least when a tool (6) is locked on the device, a sealing pipe (19) of elastic material, the length is such that, when a tool (6) is in place, this pipe (19) is slightly compressed between the said abutment (18) and the inlet orifice (8) of the tool (6) and a sealing sleeve (20) made of elastic material is adapted to the housing (1) of the device so as to be compressed between the housing (1) and the shoulder (15) of the tool (6) in place. /P