UNIVERSAL POSITIONING DEVICE FOR ORTHOPEDIC SURGERY AND METHOD OF USE THEREOF
First Claim
1. A device for positioning a tool guide block, said device comprising:
- a positioning device including a block body having an inwardly facing reference surface adapted to abut a bone element, the positioning device including a first adjustment mechanism and a second adjustment mechanism independently operable from the first adjustment mechanism, the first adjustment mechanism permitting rotation of the tool guide block about a medial-lateral extending axis such as to provide flexion-extension angle adjustment, the second adjustment mechanism permitting rotation of the tool guide block about an anterior-posterior extending axis such as to provide varus-valgus angle adjustment, the second adjustment mechanism including a coarse adjustment mechanism and a fine adjustment mechanism; and
a tool guide mounted to the positioning device, the tool guide including a platform portion which is engaged to the block body of the positioning device and the tool guide block which is releasably engaged with the platform.
2 Assignments
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Accused Products
Abstract
A positioning device assembly for positioning a tool guide block for use in an orthopedic surgery on a bone element includes a positioning device having a block body with a reference surface adapted to abut the bone element, and first and second adjustment mechanisms that are independently operable. The first adjustment mechanism permits rotation of a tool guide block about a medial-lateral extending axis such as to provide flexion-extension angle adjustment and the second adjustment mechanism permits rotation of a tool guide block about an anterior-posterior extending axis such as to provide varus-valgus angle adjustment. The second adjustment mechanism includes both a coarse and a fine adjustment mechanism integral therewith. A tool guide block assembly mounted to the positioning device, the tool guide block assembly including a platform portion which is engaged to the block body of the positioning device and the tool guide block which is releasably engaged with the platform.
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Citations
36 Claims
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1. A device for positioning a tool guide block, said device comprising:
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a positioning device including a block body having an inwardly facing reference surface adapted to abut a bone element, the positioning device including a first adjustment mechanism and a second adjustment mechanism independently operable from the first adjustment mechanism, the first adjustment mechanism permitting rotation of the tool guide block about a medial-lateral extending axis such as to provide flexion-extension angle adjustment, the second adjustment mechanism permitting rotation of the tool guide block about an anterior-posterior extending axis such as to provide varus-valgus angle adjustment, the second adjustment mechanism including a coarse adjustment mechanism and a fine adjustment mechanism; and a tool guide mounted to the positioning device, the tool guide including a platform portion which is engaged to the block body of the positioning device and the tool guide block which is releasably engaged with the platform. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18)
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17. The device as defined in claim 17, wherein the positioning device is a universal positioning device for use in orthopedic knee replacement surgery.
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19. A device for use in orthopedic knee replacement surgery on a femur, said device comprising:
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a positioning device including a block body having an inwardly facing reference surface adapted to abut a distal end of the femur, the positioning device including a first adjustment mechanism and a second adjustment mechanism independently operable from the first adjustment mechanism; a tool guide mounted to the positioning device, the tool guide including a platform portion which is engaged to the block body of the positioning device and a tool guide block which is releasably engaged with the platform; and wherein the first adjustment mechanism permits rotation of the tool guide block about a medial-lateral extending axis such as to provide flexion-extension angle adjustment, the second adjustment mechanism permitting rotation of the tool guide block about an anterior-posterior extending axis such as to provide varus-valgus angle adjustment, the second adjustment mechanism including a coarse adjustment mechanism and a fine adjustment mechanism.
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20. A device for use in orthopedic knee replacement surgery on a femur, said device comprising:
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a positioning device including a block body having a first inwardly facing reference surface adapted to abut a distal end of the femur and a second reference surface adapted to abut a posterior side of the femur, the second reference surface being substantially perpendicular to the first reference surface, the positioning device being positionable relative to the femur without being fastened thereto; a tool guide mounted to the positioning device, the tool guide including a platform portion which is engaged to the block body of the positioning device and a tool guide block which is releasably engaged with the platform via a proximal-distal adjustment mechanism permitting the tool guide block to be displaced relative to the platform, and thus the first inwardly facing reference surface of the positioning device, in a direction substantially perpendicular to the first reference surface, such as to adjust a distal resection depth in the femur; and a varus-valgus adjustment mechanism independently operable from the proximal-distal adjustment mechanism and provided in the block body of the positioning device for adjustment of a varus-valgus angle of the block body relative to the femur and therefore the varus-valgus angle of the tool guide block mounted to the positioning device. - View Dependent Claims (21, 22, 23, 24)
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25. A method of installing a tool guide block on a knee bone element in preparation of a cut to be performed in the knee bone element during orthopedic knee replacement surgery, the tool guide block being engaged to a positioning device, the method comprising:
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abutting a first reference surface of the positioning device against the knee bone element; determining a desired position and orientation of the tool guide block relative to the knee bone element; adjusting at least one of a positioning and orientation of the positioning device until the tool guide block engaged thereto is in said desired position and orientation, the step of adjusting comprising; adjusting a flexion-extension angle of the tool guide block while maintaining the first reference surface abutted against the knee bone element; independently adjusting a varus-valgus angle of the tool guide block by first making a coarse adjustment and then making a fine adjustment; adjusting a distal resection depth by displacing the tool guide block relative to the positioning device; locking the positioning device in position such as to maintain the adjusted flexion-extension angle, varus-valgus angle, and distal resection depth of the tool guide block; and fastening the tool guide block in place to the knee bone element once the desired position and orientation of the tool guide block has been reached. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification