Abstract: A device for connecting to the body of a dentistry counter-angle the unit for transmitting the rotary movement of the major axis of the counter-angle to the oblique shaft contained in the head of the counter-angle. The transmission assembly is placed inside a socket (5), forming a case, the socket itself being fixed to the body of the counter-angle by means of a bayonet attachment, consisting of at least one pin (16), fixed to the inner wall of the body of the counter-angle, and of at least one L-shaped slot (12), formed on the socket. Application to the rapid assembling and dismantling of dentistry equipment.

Abstract: Device for high-speed coupling between a dentistry appliance and an element to which it is connected during use by the practitioner, characterised in that it comprises essentially:(a) a collar (6) truncated over at least one segment (7) and fixed to the dentistry appliance;(b) a ring (12) fixed to said element, the end (14) of which is recessed to form a female shape into which the profile of said collar can fit, the connection being obtained as a result of the positioning of the collar (6), after it has penetrated into said recess (14), in a groove (15) in the ring as a result of relative rotation of the collar and the ring.Application to the connection of dentistry articles.