Tibial trialing assembly and method of trialing a tibial implant
First Claim
1. A trialing assembly for use during a knee replacement procedure to prepare a resected tibia for receiving a tibial implant and to trial an articular surface provisional, said trialing assembly comprising:
- a support plate having an outer periphery, said support plate including a bottom surface adapted for placement atop the resected tibia and an opposite top surface, said support plate having a posterior alignment rail, a medial anterior alignment rail, and a lateral anterior alignment rail, each of said posterior alignment rail, said medial anterior alignment rail, and said lateral anterior alignment rail extending from said top surface and positioned adjacent to said outer periphery of said support plate, said medial anterior alignment rail and said lateral anterior alignment rail spaced apart from one another to define a notch therebetween;
a trialing plate removably positionable on said top surface of said support plate between said posterior alignment rail, said medial anterior alignment rail, and said lateral anterior alignment rail, said trialing plate having a tab extending therefrom, said tab configured to be received within said notch defined by said medial anterior alignment rail and said lateral anterior alignment rail of said support plate, wherein interaction of said tab with said medial anterior alignment rail and said lateral anterior alignment rail substantially restricts medial-lateral movement of said trialing plate relative to said support plate; and
a broaching plate having an inferior surface, a superior surface, an anterior broaching plate alignment rail, and a posterior broaching plate alignment rail, said trialing plate configured to be received between said anterior broaching plate alignment rail and said posterior broaching plate alignment rail,wherein said support plate comprises a base plate.
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Accused Products
Abstract
A trialing assembly for use during knee replacement procedures to determine size and position of a tibial plate implant as well as the size and thickness of the articular surface prior to implantation of the implant. The trialing assembly includes a broaching plate having a tibia engaging bottom surface adapted for placement atop a tibia and an opposite top surface, the bottom and top surfaces extending between an anterior edge and a posterior edge of the broaching plate. The broaching plate includes an anterior rail and a posterior rail protruding superiorly from the top surface and extending along the anterior and posterior edges, respectively. A trialing plate is configured to removably fit atop the broaching plate between the anterior and posterior rails. The trialing plate includes an engagement member extending from a superior surface of the trialing plate and adapted to engage with an articular surface provisional.
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Citations
31 Claims
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1. A trialing assembly for use during a knee replacement procedure to prepare a resected tibia for receiving a tibial implant and to trial an articular surface provisional, said trialing assembly comprising:
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a support plate having an outer periphery, said support plate including a bottom surface adapted for placement atop the resected tibia and an opposite top surface, said support plate having a posterior alignment rail, a medial anterior alignment rail, and a lateral anterior alignment rail, each of said posterior alignment rail, said medial anterior alignment rail, and said lateral anterior alignment rail extending from said top surface and positioned adjacent to said outer periphery of said support plate, said medial anterior alignment rail and said lateral anterior alignment rail spaced apart from one another to define a notch therebetween; a trialing plate removably positionable on said top surface of said support plate between said posterior alignment rail, said medial anterior alignment rail, and said lateral anterior alignment rail, said trialing plate having a tab extending therefrom, said tab configured to be received within said notch defined by said medial anterior alignment rail and said lateral anterior alignment rail of said support plate, wherein interaction of said tab with said medial anterior alignment rail and said lateral anterior alignment rail substantially restricts medial-lateral movement of said trialing plate relative to said support plate; and a broaching plate having an inferior surface, a superior surface, an anterior broaching plate alignment rail, and a posterior broaching plate alignment rail, said trialing plate configured to be received between said anterior broaching plate alignment rail and said posterior broaching plate alignment rail, wherein said support plate comprises a base plate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A trialing assembly for use during a knee replacement procedure to prepare a resected tibia for receiving a tibial implant and to trial an articular surface provisional, said trialing assembly comprising:
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a support plate having an outer periphery, said support plate including a bottom surface adapted for placement atop the resected tibia and an opposite top surface, said support plate having a posterior alignment rail, a medial anterior alignment rail, and a lateral anterior alignment rail, each of said posterior alignment rail, said medial anterior alignment rail, and said lateral anterior alignment rail extending from said top surface and positioned adjacent to said outer periphery of said support plate, said medial anterior alignment rail and said lateral anterior alignment rail spaced apart from one another to define a notch therebetween; a trialing plate removably positionable on said top surface of said support plate between said posterior alignment rail, said medial anterior alignment rail, and said lateral anterior alignment rail, said trialing plate having a tab extending therefrom, said tab configured to be received within said notch defined by said medial anterior alignment rail and said lateral anterior alignment rail of said support plate, wherein interaction of said tab with said medial anterior alignment rail and said lateral anterior alignment rail substantially restricts medial-lateral movement of said trialing plate relative to said support plate; and a provisional base plate having an inferior surface, a superior surface, an anterior base plate alignment rail, a posterior base plate alignment rail, and a stem extending from said inferior surface, said trialing plate configured to be received between said anterior base plate alignment rail and said posterior base plate alignment rail, wherein interaction of said trialing plate with said anterior base plate alignment rail and said posterior base plate alignment rail substantially entirely prevents anterior-posterior movement of said trialing plate relative to said provisional base plate, wherein said support plate comprises a broaching plate. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A trialing assembly for use during a knee replacement procedure to prepare a resected tibia for receiving a tibial implant and to trial an articular surface provisional, said trialing assembly comprising:
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a support plate having an outer periphery, said support plate including a bottom surface adapted for placement atop the resected tibia and an opposite top surface, said support plate having a posterior alignment rail and an anterior alignment rail, said posterior alignment rail and said anterior alignment rail defining at least a portion of said outer periphery of said support plate, said top surface of said support plate extending between said posterior alignment rail and said anterior alignment rail; a trialing plate removably positionable on said top surface of said support plate between said posterior alignment rail and said anterior alignment rail, wherein interaction of said trialing plate with said posterior alignment rail and said anterior alignment rail substantially entirely prevents anterior-posterior movement of said trialing plate relative to said support plate; and a broaching plate having an inferior surface, a superior surface, an anterior broaching plate alignment rail, and a posterior broaching plate alignment rail, said trialing plate configured to be received between said anterior broaching plate alignment rail and said posterior broaching plate alignment rail, wherein said support plate comprises a base plate. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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25. A trialing assembly for use during a knee replacement procedure to prepare a resected tibia for receiving a tibial implant and to trial an articular surface provisional, said trialing assembly comprising:
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a support plate having an outer periphery, said support plate including a bottom surface adapted for placement atop the resected tibia and an opposite top surface, said support plate having a posterior alignment rail and an anterior alignment rail, said posterior alignment rail and said anterior alignment rail defining at least a portion of said outer periphery of said support plate, said top surface of said support plate extending between said posterior alignment rail and said anterior alignment rail; a trialing plate removably positionable on said top surface of said support plate between said posterior alignment rail and said anterior alignment rail, wherein interaction of said trialing plate with said posterior alignment rail and said anterior alignment rail substantially entirely prevents anterior-posterior movement of said trialing plate relative to said support plate; and a provisional base plate having an inferior surface, a superior surface, an anterior base plate alignment rail, a posterior base plate alignment rail, and a stem extending from said inferior surface, said trialing plate configured to be received between said anterior base plate alignment rail and said posterior base plate alignment rail, wherein interaction of said trialing plate with said anterior base plate alignment rail and said posterior base plate alignment rail substantially entirely prevents anterior-posterior movement of said trialing plate relative to said provisional base plate, wherein said support plate comprises a broaching plate. - View Dependent Claims (26, 27, 28, 29, 30, 31)
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Specification