Expandable reverse shoulder trial
First Claim
1. An expandable trial comprising:
- a first component having resiliently connected first and second side portions forming a slot therebetween, the first component including a recess having an opening with an initial first size;
a second component having a shaft with a helical groove thereon, the helical groove adapted to engage a guide pin protruding into the recess of the first component, the shaft of the second component having a cross-sectional area greater than the initial first size of the opening of the recess, the shaft of the second component configured to be received in the recess of the first component when the opening of the recess is expanded to an expanded second size; and
at least one third component adapted to at least one of the first and second side portions of the first component such that movement of the at least one third component in a first direction expands the slot of the first component to expand the initial first size of the opening of the recess to the expanded second size greater than the cross-sectional area of the shaft of the second component.
1 Assignment
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Accused Products
Abstract
An expandable shoulder trial for a reverse shoulder system is described. The trial includes a rotatably adjustable insert housed within a humeral cup. The insert has a proximal end and a distal end, the proximal end having a concave recess therein adapted to receive a glenosphere prosthesis. The distal end of the insert includes a shaft, the shaft having a helical groove disposed on at least a portion thereof. A distal end of the humeral cup is inserted in a humeral stem. The humeral cup has a proximal end including a recess therein, the recess defined by a circular wall. A guide pin protrudes from the circular wall and is adapted to engage the helical groove of the shaft of the insert. The proximal end of the insert may rotate along an axis toward the proximal end of the humeral cup and along the same axis away from the proximal end of the humeral cup.
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Citations
19 Claims
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1. An expandable trial comprising:
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a first component having resiliently connected first and second side portions forming a slot therebetween, the first component including a recess having an opening with an initial first size; a second component having a shaft with a helical groove thereon, the helical groove adapted to engage a guide pin protruding into the recess of the first component, the shaft of the second component having a cross-sectional area greater than the initial first size of the opening of the recess, the shaft of the second component configured to be received in the recess of the first component when the opening of the recess is expanded to an expanded second size; and at least one third component adapted to at least one of the first and second side portions of the first component such that movement of the at least one third component in a first direction expands the slot of the first component to expand the initial first size of the opening of the recess to the expanded second size greater than the cross-sectional area of the shaft of the second component. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An expandable trial comprising:
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a first component having resiliently connected first and second side portions forming a slot therebetween, the slot having a first width, the first component including a recess defined by a circular wall; a second component rotatably adjustable in the recess of the first component, the second component having a helical groove adapted to engage a guide pin protruding from the circular wall of the first component into the recess; and at least one third component adapted to at least one of the first and second side portions of the first component such that movement of the at least one third component in a first direction expands the width of the slot to a second width, wherein the second component is rotatably locked in the recess of the first component when the slot has the first width and the second component is rotatably adjustable in the recess of the first component when the guide pin is able to freely move along the helical groove of the second component when the slot has the second width.
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Specification