Adjustable knee tibial trial insert
First Claim
Patent Images
1. An adjustable tibial trial insert, comprising:
- an upper plate including an upper articular surface,a lower plate including a lower surface configured to engage a top surface of a tibial tray, anda height-adjustment mechanism coupled to and positioned generally between the upper plate and the lower plate and configured to move between a closed position where the upper and lower plates are adjacent each other and an opened position where the upper and lower plates are spaced-apart from each other, wherein the height-adjustment mechanism includes a drive coupled to the upper plate and the lower plate and an actuator coupled to the drive and to one of the upper and lower plates,wherein the actuator includes a lever pivotably coupled to one of the upper plate and the lower plate.
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Abstract
An adjustable tibial trial insert includes an upper plate having an upper articular surface and a lower plate. A height-adjustment mechanism of the insert is coupled to and positioned generally between the upper plate and the lower plate and is configured to move between a closed position where the upper and lower plates are adjacent each other and an opened position where the upper and lower plates are spaced-apart from each other in order to adjust a height or thickness of the insert.
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Citations
16 Claims
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1. An adjustable tibial trial insert, comprising:
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an upper plate including an upper articular surface, a lower plate including a lower surface configured to engage a top surface of a tibial tray, and a height-adjustment mechanism coupled to and positioned generally between the upper plate and the lower plate and configured to move between a closed position where the upper and lower plates are adjacent each other and an opened position where the upper and lower plates are spaced-apart from each other, wherein the height-adjustment mechanism includes a drive coupled to the upper plate and the lower plate and an actuator coupled to the drive and to one of the upper and lower plates, wherein the actuator includes a lever pivotably coupled to one of the upper plate and the lower plate. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An adjustable tibial trial insert, comprising:
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an upper plate including an upper articular surface, a lower plate including a lower surface configured to engage a top surface of a tibial tray, and a height-adjustment mechanism coupled to and positioned generally between the upper plate and the lower plate and configured to move between a closed position where the upper and lower plates are adjacent each other and an opened position where the upper and lower plates are spaced-apart from each other, wherein the height-adjustment mechanism includes a height-adjustment lever pivotably coupled to one of the upper plate and the lower plate at a pivot point and a tie-rod coupled to the height-adjustment lever at a distance spaced-apart from the pivot point of the height-adjustment lever such that pivoting movement of the height-adjustment lever about the pivot point moves the tie-rod in a generally lateral direction, wherein the lower plate includes a cavity formed in an upper surface of the lower plate to receive a portion of the height-adjustment mechanism and a slot formed in a front surface of the lower plate in communication with the cavity, and wherein the height-adjustment lever is received through the slot. - View Dependent Claims (9, 10, 11)
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12. An adjustable tibial trial insert comprising:
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an upper plate including an upper articular surface, a lower plate, a height-adjustment mechanism including (i) drive coupled to the upper plate and the lower plate for moving the upper plate and the lower plate away from each other, (ii) a tie-rod pivotably coupled to the drive, and (iii) an actuator pivotably coupled at a first pivot point to one of the upper plate and the lower plate and pivotably coupled to the tie-rod at a second pivot point spaced-apart from the first pivot point, wherein the drive of the height-adjustment mechanism includes a crossbar coupled at a first end to the upper plate and at a second end to the lower plate and the tie-rod is coupled to one of the first end and the second end of the crossbar. - View Dependent Claims (13, 14)
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15. An adjustable tibial trial insert comprising:
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an upper plate including an upper articular surface, a lower plate, and a non-threaded height-adjustment mechanism including (i) a drive coupled to the upper plate and the lower plate and movable between a closed position and an opened position to adjust a height of the insert, and (ii) an actuator coupled the drive and to one of the upper and lower plates to move the drive between the closed and opened positions, wherein one of the upper plate and the lower plate includes a calibrated slot to visually indicate the height of the insert and the actuator is received within with the calibrated slot. - View Dependent Claims (16)
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Specification