System and method for joint resurface repair
First Claim
1. A guide device for locating a working axis substantially normal with respect to an articular surface of bone, said device comprising:
- a shaft having an end and an aiming feature for projecting an axis; and
a contact surface comprising a plurality of points radially extending from the aiming feature of said shaft;
wherein said plurality of points of said contact surface surrounds a defect in an articular surface.
2 Assignments
0 Petitions
Accused Products
Abstract
A generic bone implant, or set of standardized implants, is created based on using a guide device to develop an axis normal to an articular surface of bone and collecting only one or two data points. A generic cutting tool is used to cut the bone to a point where a generic implant can be used. Several improved tools relating to the procedure for using such an implant, as well as methods for using implants consistent with the invention are further described, including: single-axis and biaxial drill guide tools and methods, generic single-axis implant methods and devices, generic biaxial implant methods and devices, tools and methods for holding or delivering an implant, removal or revision tools and methods, digital measuring systems and methods, and set of measuring gauges for determining the appropriate implant dimensions.
134 Citations
80 Claims
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1. A guide device for locating a working axis substantially normal with respect to an articular surface of bone, said device comprising:
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a shaft having an end and an aiming feature for projecting an axis; and
a contact surface comprising a plurality of points radially extending from the aiming feature of said shaft;
wherein said plurality of points of said contact surface surrounds a defect in an articular surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A guide device for locating a working axis substantially normal with respect to an articular surface of bone, said device comprising:
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a shaft having an aiming feature for projecting an axis; and
a contact surface comprising a plurality of points radially equidistant from the aiming feature of said shaft.
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10. A guide device for locating a working axis substantially normal with respect to an articular surface of bone, said device comprising:
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a shaft having an aiming feature for projecting an axis; and
a contact surface comprising a plurality of points equidistant from the aiming feature of said shaft.
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11. A guide device for locating a working axis substantially normal with respect to an articular surface of bone, said device comprising:
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a shaft having an end and a central longitudinal axis; and
a contact surface comprising a plurality of points radially equidistant from said central longitudinal axis. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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12. A guide device for locating a working axis substantially normal with respect to a non-spherical articular surface of bone, said device comprising:
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a first element having a longitudinal axis and a contact surface mounted to a shaft; and
a second element with a contact surface movable with respect to the contact surface of the first element, wherein, when said guide device is placed on a non-spherical articular surface, both contact surfaces make contact with said articular surface.
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22. A guide device for locating a working axis substantially normal with respect to an articular surface of bone having an anterior-posterior (AP) curve and a medial-lateral (ML) curve, said device comprising:
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a cannulated outer shaft, said outer shaft having a central longitudinal axis and an outer component at its distal end, said outer component comprising a set of arms; and
a cannulated inner shaft slidably disposed within the cannula of said outer shaft, said inner shaft having an inner component at its distal end and sharing the central longitudinal axis of said outer shaft, said inner component comprising a set of arms. - View Dependent Claims (24, 25, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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23. A method for replacing a portion of an articular surface of bone, said method comprising:
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establishing a working axis substantially normal to an articular surface of bone;
excising only a portion of said articular surface adjacent said axis, thereby creating an implant site; and
installing an artificial implant into said implant site.
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26. A method for replacing a portion of an articular surface of bone, said method comprising:
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establishing a working axis substantially normal to an articular surface of bone;
excising only a portion of said articular surface adjacent said axis, thereby creating an implant site;
selecting an implant corresponding to the dimensions of said implant site from a set of variously-sized implants; and
installing said selected implant into said implant site.
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40. A method for replacing a portion of an articular surface of bone generally defined by a first and a second curve, said method comprising:
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establishing an axis generally normal to the portion of an articular surface of bone to be replaced based on a first curve and a second curve of said articular surface;
excising only a portion of said articular surface adjacent said axis, thereby creating an implant site;
fabricating an artificial implant corresponding to the dimensions of said implant site; and
installing said artificial implant into said implant site. - View Dependent Claims (41, 42)
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43. A method for replacing a portion of an articular surface of bone generally defined by a first and a second curve, said method comprising:
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establishing an axis generally normal to the portion of an articular surface of bone to be replaced based on a first curve and a second curve of said articular surface;
excising only a portion of said articular surface adjacent said axis, thereby creating an implant site;
selecting from a set of variously-sized artificial implants an artificial implant corresponding to the dimensions of said implant site; and
installing said selected implant into said implant site. - View Dependent Claims (44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 59)
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58. A tool for holding an implant, said tool comprising:
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at least one element adapted for connection to an activatable suction source; and
an elastomeric suction tip adapted to receive an implant, said tip being coupled to said at least one element.
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60. A method for holding an implant comprising:
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coupling a suction source to an implant; and
activating said suction source.
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61. A method for delivering an implant comprising:
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coupling an active suction source to an implant;
approximating said implant to its delivery site; and
applying a force to said implant in the direction of said delivery site.
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62. A tool for removing an implant from its delivery site, said tool comprising:
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an element with a generally leading edge and a barb element disposed proximally to the leading edge; and
at least one structural element that creates sufficient bias of the leading edge of the tool to rigidly couple to a surface of the implant to be removed. - View Dependent Claims (63)
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64. A tool for removing an implant from its delivery site, said tool comprising:
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a cylindrical structure having an end;
said end comprising a longitudinal central axis, a circular blade portion having a leading edge comprising a blade surface turned on the distal-most portion, and a lip portion disposed proximally with respect to the leading edge; and
a plurality of slits parallel to the longitudinal central axis of said end formed along the length of said cylindrical structure, so as to permit sufficient outward expansion of the distal end to accommodate the top edge of an implant therein. - View Dependent Claims (65)
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66. A method for removing an implant from its delivery site, said method comprising:
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disposing the lip portion of the leading edge of the end of a removal tool over the upper edge of an implant seated in its delivery site; and
applying a pulling force to said removal tool. - View Dependent Claims (67, 69, 70, 71, 72, 73)
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68. A device for measuring a portion of an articular surface of bone, said device comprising:
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a handpiece;
a shaft disposed within said handpiece, said shaft comprising a feature for aligning with a working axis or mating to a fixed element;
a contact tip moveably coupled to said shaft; and
at least one measuring element coupled to said contact tip or said shaft.
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74. A device for mapping a portion of an articular surface of bone, said device comprising:
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a handpiece;
an inner shaft running along the length of and disposed within said handpiece, said inner shaft comprising a mating feature for mating with a fixed element located substantially normal with respect to an articular surface;
a contact tip slidably and rotatably disposed about said inner shaft;
a rotary measuring element coupled to and rotating with said contact tip; and
a linear measuring element nested concentrically and coaxially to said rotary measuring element, and coupled to and moving linearly with said contact tip. - View Dependent Claims (75, 76, 77, 78, 80)
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79. A set of guide devices for locating a working axis substantially normal with respect to an articular surface of bone or for determining the dimension of an implant to be installed in an articular surface of bone, said set comprising:
a plurality of variously dimensioned guide devices, each said guide device having a handling tab or shaft and a contact surface;
said contact surface comprising a plurality of points radially extending from said handling tab or shaft;
wherein, when at least one said guide device is placed on an articular surface, said contact surface makes contact with said articular surface, and said plurality of points of said contact surface surrounds a defect in said articular surface.
Specification