The disclosure relates to a dental screwdriver having a shaft portion made of a smart type alloy that bends with little or no resistance along an arch forming portion thereof and without imparting torqueing forces along a distal front end portion thereof onto which is connected a drive tip designed to interface with an appropriately sized screw. The smart alloy automatically assumes its original shape in the absence of twisting forces on the shaft along the arch forming portion. In an alternate embodiment, assuming the original shape involves applying heat and/or subtle finger pressure. The dental screwdriver may be part of a set of screwdrivers, each having a distal front end portion which is uniquely weighted, sized and/or dimensioned to accommodate different driver tips, handle different torqueing functions, and/or configured to bend to a specific maximum angular arch without permanent deformation. A dental prosthetic having a curved bore cavity is also described.

A screw element for the fixation of bone components and bone fragments is disclosed having a shaft with an outside screw thread and a longitudinal axis extending along the shaft and defining a distal direction and a proximal direction, and an insertion direction and an opposite removal direction, and has a tool attachment point starting radially inwards and the tool attachment point has a central opening and in the wall of this opening at least five tooth profiles directed radially outwards and mainly parallel to the screw axis directed radially outwards and mainly parallel to the screw axis are formed in the wall of this opening, and for each tooth profile an insertion wall in insertion direction and a removal wall in removal direction can be separated, and that the surface of the insertion wall is greater than the surface of the removal wall.

Embodiments of a compliant orthopedic driver are disclosed herein. In some embodiments, compliant orthopedic driver includes a body extending from a proximal end to a distal end along a driver axis; a driver tip disposed at the distal end of the body, wherein the body includes at least one compliant portion configured to allow the driver flex about at least two axes transverse to the driver axis.

A bone fixation assembly is disclosed. The bone fixation assembly may include a bone fixation plate including a fastener hole and a cavity adjacent to the fastener hole. The bone fixation assembly may also include a clip. The clip may include a body having a partial circular shape, the body positioned at least partially in the cavity. The clip may further include a plurality of tabs extending inward relative to the partial circular shape of the body, each tab having a convex shape extending inward relative to the partial circular shape of the body, wherein the body and the plurality of tabs are positioned below a top surface of the bone fixation plate.

Expandable spinal implants, systems and methods are disclosed. An expandable spinal implant may include a first endplate, a second endplate, and a moving mechanism that is operably coupled to the first and second endplates. The moving mechanism may include a wedge, a first sliding frame and a second sliding frame disposed on opposite sides of the wedge, a screw guide housing a rotatable first set screw and a rotatable second set screw opposite the first set screw. The first set screw may be operably coupled to the second sliding frame and the second set screw may be operably coupled to the wedge. The moving mechanism may operably adjust a spacing between the first and second endplates upon simultaneous rotation of the first and second set screws and operably adjust an angle of inclination between the first and second endplates upon translating the first set screw or second set screw.

A bone fixation assembly is disclosed. The bone fixation assembly may include a bone fixation plate including a fastener hole and a cavity adjacent to the fastener hole. The bone fixation assembly may also include a clip. The clip may include a body having a partial circular shape, the body positioned at least partially in the cavity. The clip may further include a plurality of tabs extending inward relative to the partial circular shape of the body, each tab having a convex shape extending inward relative to the partial circular shape of the body, wherein the body and the plurality of tabs are positioned below a top surface of the bone fixation plate.

The present disclosure provides for spinal implants deployable between a contracted position and an expanded position. The spinal implant may include a first endplate and a second endplate, each having a plurality of guide walls and inclined ramps. The spinal implant may further include a moving mechanism having first and second trolleys configured to act against the first and second plurality of ramps. The expansion mechanism may further include a first set screw and a second set screw opposite the first set screw. The moving mechanism may be configured to operably adjust a spacing between the first and second endplates upon simultaneous rotation of the first and second set screws along a rotation axis, and may also operably adjust an angle of inclination between the first and second endplates upon rotating the first set screw or second set screw along the rotation axis.

A bone anchor system may include a bone anchor assembly and a driver tool. The bone anchor assembly may generally include a bone screw, a collar member, and a tulip member. The collar member may include first and second retaining arms configured to receive a retaining feature of the driver tool. The driver tool may be removably couplable to the bone anchor assembly by inserting the retention feature between the first and second retaining arms of the collar member, such that the retention feature is retained by the first and second retaining arms of the collar member.

Disclosed screwdrivers may include a rotatable drive shaft having a drive portion disposed at a distal end thereof, and a drive end disposed at a proximal end thereof. Disclosed screwdrivers may include an angled tip portion that is angled with respect to the longitudinal direction, and a mechanism configured to transfer a rotational force applied to the drive portion of the drive shaft through the angled tip portion to the drive end of the drive shaft. Disclosed screwdrivers may include an elastic retaining clip configured to have a bone screw securely attached therein at a clipping force and progressively release the bone screw therein at an extraction force. Disclosed screwdrivers may include at least one spring contacting the elastic retaining clip and the angled tip portion that is configured to facilitate the progressive release of the bone screw.

Bone fixation systems include various combinations of stabilizing members, dynamic elements, fasteners, and locking mechanisms. Bone plates receive dynamic bone staples and bone screws. Other dynamic elements include elbow pegs, straight pegs, and wire pegs.