Bone fixation plate with self-locking screws
First Claim
1. A bone plate assembly for implantation adjacent to a bony structure, comprising:
- a bone plate having at least one aperture formed therein; and
at least one fastener having an elongated threaded shank and a head, said threaded shank being receivable through said aperture for secure thread-in engagement with the bony structure and to position said fastener head engaging said bone plate at an outboard side of said aperture;
said at least one fastener further carrying a lock element engageable with a portion of said bone plate within said aperture, and receivable through and beyond said aperture portion for preventing said fastener from backing out of said aperture.
1 Assignment
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Accused Products
Abstract
A dynamic bone fixation plate assembly includes a bone plate with at least one fastener-receiving aperture, and at least one self-locking fastener. Each fastener includes a threaded shaft or shank for secure engagement with patient bone, and a head for engaging the bone plate in a manner providing a low profile orthopedic device. The fastener shank includes features lock the fastener to the bone plate to prevent the fastener from backing out of the bone plate while still allowing rotational movement between the fastener and the plate. Utilizing the features of the present invention, the bone plate controllably subsides and settles into a position of stability.
301 Citations
41 Claims
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1. A bone plate assembly for implantation adjacent to a bony structure, comprising:
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a bone plate having at least one aperture formed therein; and
at least one fastener having an elongated threaded shank and a head, said threaded shank being receivable through said aperture for secure thread-in engagement with the bony structure and to position said fastener head engaging said bone plate at an outboard side of said aperture;
said at least one fastener further carrying a lock element engageable with a portion of said bone plate within said aperture, and receivable through and beyond said aperture portion for preventing said fastener from backing out of said aperture. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A bone plate assembly for implantation adjacent to a bony structure, comprising:
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a bone plate having at least one aperture formed therein, said aperture being internally threaded to define a female thread form; and
at least one fastener having an elongated threaded shank and a head, said threaded shank being receivable through said aperture for secure thread-in engagement with the bony structure and to position said fastener head engaging said bone plate at an outboard side of said aperture;
said at least one fastener including a first thread form on said shank at a distal end thereof for secure thread-in engagement with the bony structure, and a second thread form on said shank disposed between said head and said first thread form, said first thread form being receivable through said internally threaded aperture, and said second thread form being threadably engagable with the internally threaded aperture and threadably advancable to a position disengaged from said internally threaded aperture at an inboard side thereof for preventing said fastener from backing out of said aperture. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A bone plate assembly for implantation adjacent to a bony structure, comprising:
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a bone plate having at least one aperture formed therein; and
at least one fastener having an elongated threaded shank and a head, said threaded shank being receivable through said aperture for secure thread-in engagement with the bony structure and to position said fastener head engaging said bone plate at an outboard side of said aperture;
said at least one fastener further carrying at least one flexible tang, said tang flexing radially inwardly upon engagement with a portion of said aperture, and said tang being radially outwardly springable to a radially enlarged configuration upon passage through and beyond said aperture portion for preventing said fastener from backing out of said aperture. - View Dependent Claims (37, 38, 39, 40, 41)
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Specification