A handle system for supporting a tool defining a tool axis during the performance of dental procedures comprises a handle defining a handle axis, a rotation sleeve, a head assembly and a gear set comprising first and second gear portions. The rotation sleeve supports the first gear portion. The head assembly supports the second gear portion. The handle supports the rotation sleeve for rotation relative to the handle. The handle supports the head assembly such that the first gear portion engages the second gear portion. With the head assembly supported by the handle, the head assembly engages the tool to support the tool such that the tool axis extends at a first angle relative to the handle axis and rotation of the rotation sleeve relative to the handle causes axial rotation of the tool about the tool axis.

A surgical tool-piece and a coupling mechanism for a surgical tool-piece are provided. The surgical tool-piece is configured to be driving by a driving mechanism. The surgical tool-piece comprises a shaft having a longitudinal axis running from a distal end of the shaft to a coupling portion at a proximal end of the shaft. The coupling portion comprises a driving section comprising at least three indentations located around the circumference of the coupling portion, each indentation being configured to receive a corresponding driving element of the driving mechanism to secure the tool-piece both longitudinally and rotationally.

A dental handpiece configured to rotatably drive a dental treatment tool mounted in a chuck mechanism includes the chuck mechanism in which the dental treatment tool is mounted so as to be attachable and detachable. The chuck mechanism includes a hollow cylindrical sleeve, a cylindrical slide member, a plurality of divided movable pieces disposed in the sleeve, an elastic biasing member configured to bias the cylindrical slide member forward in an insertion direction of the dental treatment tool, and a stopper unit which restricts forward axial movement of the plurality of divided movable pieces in the insertion direction. The divided movable pieces are moved in a radial direction by relative movement between the divided movable pieces and the cylindrical slide member in the axial direction, so that fixation of the dental treatment tool and release of the fixation are performed.

A handpiece for dental or surgical applications has a chuck for rotatably clamping a tool such as a bur, the chuck being drivingly connectable to a drive mechanism such as to rotate the tool about a rotation axis thereof, a push button operatively connected to the chuck, configured to release the tool from the chuck upon depressing the push button, a spherical element, preferably a ball, fitted within or mounted at the push button, arranged and configured such that, when the push button is depressed, the spherical element enters into contact with the chuck, the spherical element being of a material with a high hardness on the Vickers scale of >2000.

A holder for medical/dental instruments and method of using the holder. The holder may include a body, including a first surface and a second surface. The holder may further include a ridge formed along a length of the first surface of the body; a wall portion formed along the length of the first surface of the body and extending vertically therefrom, wherein the wall portion may be parallel to and spaced apart from the ridge; and a plurality of grooves formed in the ridge.

The present invention relates to a chucking device for a drilling tool for a dental handpiece, as well as a handpiece for dental or surgical applications comprising: —a head (10) in which is inserted in removable fashion a drilling tool (100) able to be actuated in rotation about an axis of rotation (R) by means of a drive mechanism comprising a drive shaft (2) rotating about this axis of rotation (R)—a clamping device for the drilling tool (100), comprising a chucking clamp (4) disposed inside said drive shaft (2) for axial retention of the drilling tool (100) with respect to the axis of rotation (R), the clamp (4) co-operating with a plunger (5), and—a push-button (61) arranged to act upon the plunger (5) in order to release the drilling tool (100); The handpiece (1) contains a permanent magnet (7) arranged symmetrically around the axis of rotation (R) and exerting a force of magnetic attraction (F) on the plunger (5) in direction of the push-button (61).

The present invention relates to a transmission rotor for a handpiece (1) suitable to dental or chirurgical applications, comprising a device for clamping a drilling tool (100), able to be actuated in rotation about an axis of rotation (R) by means of a drive mechanism which comprises a drive shaft (2) rotatable about the said axis of rotation (R).

The clamping device comprises a clamp (4) disposed inside the drive shaft (2) for axially securing the drilling tool (100) with respect to the axis of rotation (R), the clamp (4) co-operating with a plunger (5) for releasing the drilling tool (100), as well as a radial guide bush (3) of the drilling tool, rotating integrally with the drive shaft (2), and wherein it comprises a selective angular coupling mechanism (C.sub.s) between the clamp (4) and the guide bush (3) or the drive shaft (2) directly, according to the chosen preferred embodiment; the selective angular coupling mechanism (C.sub.s) exerting an angular holding torque (C) between the clamp (4) and the guide bush (3) or respectively the drive shaft (2), the value of which being inferior to that corresponding to the slip threshold between the said clamp (4) and the drilling tool (100).

A surgical grip for receiving a handpiece shaft for conjoint rotation therewith and/or for receiving a medical tool in such a way as to transmit torque, includes a carrier sleeve on which at least one coupling component provided for coupling the handpiece shaft is attached such that the at least one coupling component can be brought to a coupled position and to an uncoupled position in the operating state, wherein the at least one coupling component can be brought into contact with an activation unit which is arranged between the carrier sleeve and to an outer actuation sleeve, wherein a rotation securing unit present inside the actuation sleeve acts on the activation unit in a spring-biased manner in the operating state such that the activation unit is held secure against rotation relative to the carrier sleeve.

Presented is a handheld dental bur that securely holds and offers secured tightening of a dental bur. The handheld dental bur includes a handle portion having a first end with a set of female threads and a second end to receive at least a tightening tool or a clamping tool. The handheld dental bur further includes a Micro-Chuck Assembly (MCA) that includes a collar with a hollow anterior, a collet with an elongated opening located in between multiple double-tapered prongs for receiving a shank portion of the dental bur, and a set of male threads. Further, the handheld dental bur includes a washer disposed of around an end of the collar separating the handle and the collar. The male threads of the collet engage with the female threads provided by the handle portion to detachably attach the MCA to the handle portion.

The invention relates to a dental handpiece with a manually operable push button for actuating the trigger mechanism, wherein the push button is double-walled with an outer cover plate and an inner contact element, wherein for actuating the push button an upper side of the outer cover plate is pressable by a user against a bias, thereby actuating an actuator by an underside of the inner contact element to actuate the trigger mechanism, wherein a thermal insulation layer extends between the outer cover plate and the inner contact element which causes a thermal decoupling of the outer cover plate from the inner contact element.