Bone Screw and Self-Retaining Driver

摘要

Techniques disclosed herein include systems and methods for a bone screw and self-retaining driver. The system includes a mechanism that enables a bone screw to be rigidly attached to a screwdriver for manipulation and transfer of bone fragments and grafts to a fixation site, such as during surgery. The system includes a cannulated bone screw that has a drive connection that engages with a drive structures of a screwdriver. The bone screw also includes a structural connector that securely attaches to or receives an internal shaft or rod of the screwdriver. The internal shaft or rod of the screwdriver can rotate and slide independent of an outer shaft of screwdriver. Accordingly, the internal shaft of the screwdriver can rigidly connect with the bone screw enabling applied torque to the screwdriver to be transferred to the bone screw, without the bone screw falling off of the drive connection.

主权项

1. A method of fastening a bone screw to bone media using a bone screwdriver, the method comprising:
removably securing a bone screw to a bone screwdriver, the bone screw comprising an elongated member having a distal end, a proximal end, and a longitudinal axis, at least a portion of the distal end having external threading adapted to advance the bone screw into bone media, the proximal end having a force-receiving structure configured to receive applied torque, the bone screw being cannulated by defining a passage that follows the longitudinal axis, the defined passage sized to enable the bone screw to travel along a guide wire, the proximal end defining a socket having internal threading, the defined socket aligned with the defined passage, the bone screwdriver comprising a shaft portion connected to a handle portion, the shaft portion including an external shaft and an internal shaft, the internal shaft positioned within the external shaft, the internal shaft configured to rotate independent of the external shaft, a distal end of the external shaft having a force-transfer structure configured to transfer applied torque to the force-receiving structure of the bone screw When in contact with the force-receiving structure, a distal end of the internal shaft having external threading adapted to advance into the defined socket of the bone screw such that when advanced into internal threading of the defined socket the bone screw is securely attached to the bone screwdriver via the internal shaft such that the force-transfer structure is in contact with the force-receiving structure, the handle portion including a rotation mechanism that controls rotation of the internal shaft independent of the external shaft, the bone screwdriver being cannulated by defining a passage that follows a longitudinal axis of the bone screwdriver such that the bone screwdriver can travel along a guide wire, removably securing the bone screw to the bone screwdriver includes rotating the internal shaft to engage with the defined socket of the bone screw; passing the secured bone screw and bone screwdriver along a surgical guide wire; advancing the bone screw into bone media; and releasing the internal shaft from the bone screw by rotating the internal shaft.