Tools for cutting bone, specifically cutting a hemispherical cavity in bone. Preferably, tools including an adaptor device configured to provide independent control of the cutting orientation.

The present disclosure provides medical instruments and medical instrument components having targeted torsional failure. Such targeted torsional failure helps prevent a surgeon from applying excessive torque that may damage an implant or bone, and also helps avoid the problems and complications that arise when medical instruments break within patients during surgical procedures. To provide such targeted torsional failure, the disclosed medical instrument components include a breakaway section designed so that the component breaks at a desired amount of torque, at a desired location, and in a desired way. The provided medical instrument components may also include a sleeve to increase side-loading strength that may otherwise be reduced due to the breakaway section. The increased side-loading strength may help prevent accidental bending-type failures. The presently disclosed medical instrument component therefore provides targeted torsional failure without sacrificing side-loading strength.

Milling device for prosthetic surgery comprising a milling tool rotating about a milling axis, and a handling body. The handling body is provided with a drive rotating rod which develops along a longitudinal axis of linear rotation and is connected to the milling tool in order to make the milling tool rotate about the milling axis.

Apparatus and method to permit selective cutting and coagulation required in fine and delicate surgical procedures. The apparatus includes two body members having proximal ends and distal ends with jaw members located adjacent the body member's distal ends. The body members are joined at a pivot located adjacent to the first and second jaw members joining the first and second body members where the body members' rotation about the pivot defines a plane of rotation. The scissors are adapted for selective application of energy to at least one jaw member by a switch located in the plane of rotation.

A medical handle for pneumatically or hydraulically driven medical instruments or motor units includes a clutch member for mechanical and pneumatic/hydraulic coupling of a corresponding clutch member and a manually operable valve mechanism for selective pressurization of a medical instrument coupled thereto or the motor unit thereof, the valve mechanism being provided with a safety device for preventing pressurization in the case of an uncoupled medical instrument or the motor unit thereof. The clutch member present on the side of the handle is provided to interact with the valve mechanism such that during or by the mechanical coupling operation the latter is automatically opened and/or enabled for manual opening, whereas in the uncoupled state the valve mechanism is closed and/or enabling is cancelled.

Provided is a medical handpiece having liquid spray and suction functions and capable of being replaced with a drill. The medical handpiece includes a handpiece body having an accommodation space therein, a spray unit receiving liquid from an outside to spray the liquid onto a target to be treated, a pump unit transmitting air pressure to the spray unit to increase a spray speed of liquid sprayed by the spray unit, a drive unit converting a rotary motion into a reciprocating motion to transmit power to the pump unit, and a suction unit sucking liquid and foreign matter from the target to be treated.

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 rotary cutting tool including an elongated housing having a proximal end and a distal end, the elongated housing extends circumferentially around a first axis. A drive shaft disposed within the elongated housing and extending between the proximal end and the distal end and rotatable about the first axis. A cutting bit housing coupled to the distal end of the elongated housing and rotatable relative to the drive shaft about an articulation axis between a non-articulated position and one or more articulated positions. A rotary cutting bit coupled to the cutting bit housing and the drive shaft and rotatable about the articulation axis with the cutting bit housing, the rotary cutting bit and drive shaft forming a constant velocity joint.

An engagement mechanism for a driver instrument (24) can comprise a mobile shaft (121, 221), a collet (122, 222) and an angled engagement interface (124; 136A-D). The mobile shaft comprises a first shaft portion (128, 228) located at a proximal end of ON the mobile shaft, a driver portion (126, 226) located at a distal end of the mobile shaft, and an internal passageway (180, 280) extending from the proximal end to the distal end. The collet comprises a second shaft portion (134, 234) disposed within the passageway at co the first shaft portion, and flexible arms (132A-D, 232A-D) extending from the second shaft portion within the driver portion. The angled engagement interface is positioned between the driver portion and the flexible arms, and is configured to permit the driver portion to push or deflect the flexible arms radially inward when the first shaft portion is slid along the second shaft portion. The angled engagement interface can include bearings (224A-D) and a frusto-conical contact surface (124; 282A-D).

Disclosed is an instrument assembly for performing a procedure. The instrument assembly may include a powered motor for moving, such as rotating, a tool tip. The instrument assembly may include a transmission or a gear assembly to provide varying speed and/or torque to the tool tip.