DRIVER INSTRUMENTS AND RELATED METHODS
First Claim
1. An instrument for driving a bone anchor assembly into bone, the instrument comprising:
- a driver shaft having a distal drive tip and a proximal driven end;
an elongate body having proximal and distal ends that defines a central passage in which the driver shaft is rotatably disposed; and
a release button disposed in the body and having at least a first position in which the driver shaft can be removed from the body and a second position in which the driver shaft cannot be removed from the body.
5 Assignments
0 Petitions
Accused Products
Abstract
Driver instruments are disclosed herein with various features for improving usability, easing the task of cleaning or sterilizing the instrument, reducing patient trauma associated with use of the instrument, and/or reducing the cost and assembly burden of the instrument. For example, a driver instrument can include a guide sleeve to protect patient tissue from damage caused by rotating components of the instrument or a bone anchor assembly coupled thereto, and to protect extension tabs of the bone anchor assembly from inadvertent separation. By way of further example, an instrument can include a preload assembly for maintaining engagement of a driver shaft of the instrument with a bone anchor assembly. As yet another example, an instrument can consist of a small number of components which are configured for simple, tool-free assembly and disassembly. An instrument can also be configured for use with bone anchor assemblies with and without extension tabs.
58 Citations
20 Claims
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1. An instrument for driving a bone anchor assembly into bone, the instrument comprising:
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a driver shaft having a distal drive tip and a proximal driven end; an elongate body having proximal and distal ends that defines a central passage in which the driver shaft is rotatably disposed; and a release button disposed in the body and having at least a first position in which the driver shaft can be removed from the body and a second position in which the driver shaft cannot be removed from the body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An instrument for driving a bone anchor assembly into bone, the instrument comprising:
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a driver shaft having a distal drive tip and a proximal driven end; an elongate body having proximal and distal ends that defines a central passage in which the driver shaft is rotatably disposed; a release button disposed in the body and having a collar slidably disposed therein, the collar being configured to selectively engage the driver shaft; and a preload spring disposed between the release button and the collar configured to bias the driver shaft in a distal direction with respect to the body. - View Dependent Claims (17)
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18. A method of driving a bone anchor assembly into bone, comprising:
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engaging a drive interface of a bone anchor assembly with a drive tip of a driver shaft; advancing a body portion in which the driver shaft is rotatably disposed distally with respect to the bone anchor assembly to couple an engagement feature of the body portion with a corresponding engagement feature of the bone anchor assembly, wherein said distal advancement preloads a spring disposed in the body portion; rotating the driver shaft to drive the bone anchor assembly into bone; and actuating a release button to disengage the driver shaft from the body portion such that the driver shaft can be removed from the body portion. - View Dependent Claims (19, 20)
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Specification