Bone plate for elastic osteosynthesis
First Claim
1. A device, comprising:
- a bone fracture fixation plate having an outer surface, a bone-facing surface, a first end, a second end, and a longitudinal axis extending between the first and second ends, wherein the bone plate comprises one or more sliding elements elastically suspended relative to the bone plate, the elastic suspension of each sliding element in the plate being achieved by an elastic material disposed between the sliding element and the plate, each sliding element containing one or more threaded receiving holes for bone screws that have a correspondingly threaded head lockable at a fixed angle into the receiving holes;
wherein the one or more sliding elements undergo controlled displacement parallel to the longitudinal axis of the plate but are substantially constrained against displacement perpendicular to the longitudinal axis of the plate, andwherein the one or more sliding elements are configured for rigid fixation to the bone screws without compressing the bone plate or sliding elements onto a bone surface.
3 Assignments
0 Petitions
Accused Products
Abstract
Embodiments provide a method and device for plate osteosynthesis of a bone fracture that allows angle-stable fixation of the bone fracture, while permitting elastic axial motion at the fracture site in a controlled, symmetric manner to stimulate fracture healing. Embodiments pertain to a bone plate having an outer surface and a bone-facing surface. The bone plate incorporating internal sliding elements containing a threaded receiving hole for bone screws that have a correspondingly threaded screw head. The sliding elements undergo controlled displacement parallel to the longitudinal axis of the plate but are substantially constrained against displacement perpendicular to the longitudinal axis of the plate. The bone screws with threaded heads may be rigidly fixed to the threaded receiving holes in the sliding elements without compressing the bone plate onto the bone surface. Sliding elements are elastically suspended inside the bone plate and undergo dynamic motion.
144 Citations
23 Claims
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1. A device, comprising:
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a bone fracture fixation plate having an outer surface, a bone-facing surface, a first end, a second end, and a longitudinal axis extending between the first and second ends, wherein the bone plate comprises one or more sliding elements elastically suspended relative to the bone plate, the elastic suspension of each sliding element in the plate being achieved by an elastic material disposed between the sliding element and the plate, each sliding element containing one or more threaded receiving holes for bone screws that have a correspondingly threaded head lockable at a fixed angle into the receiving holes; wherein the one or more sliding elements undergo controlled displacement parallel to the longitudinal axis of the plate but are substantially constrained against displacement perpendicular to the longitudinal axis of the plate, and wherein the one or more sliding elements are configured for rigid fixation to the bone screws without compressing the bone plate or sliding elements onto a bone surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A device, comprising:
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a bone fracture fixation plate having an outer surface and a bone-facing surface, wherein the bone plate comprises one or more sliding elements elastically suspended relative to the bone plate, wherein each sliding element contains one or more threaded receiving holes for bone screws that have a correspondingly threaded head lockable at a fixed angle into the receiving holes; wherein the elastic suspension of the sliding element in the plate is achieved by two or more spring elements formed by an elastic material applied between the sliding element and the plate, wherein the spring elements effect an amount of bi-directional translation of the sliding element relative to the plate in response to an applied force in a longitudinal direction of the plate; wherein the one or more sliding elements undergo controlled displacement parallel to a longitudinal axis of the plate but are substantially constrained against displacement perpendicular to the longitudinal axis of the plate; and wherein the one or more sliding elements are configured for rigid fixation to the bone screws without compressing the bone plate or sliding elements onto a bone surface.
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23. A device, comprising:
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a bone fracture fixation plate having an outer surface and a bone-facing surface, wherein the bone plate comprises one or more sliding elements elastically suspended relative to the bone plate, wherein each sliding element contains one or more threaded receiving holes for bone screws that have a correspondingly threaded head lockable at a fixed angle into the receiving holes; wherein the one or more sliding elements undergo controlled displacement parallel to a longitudinal axis of the plate but are substantially constrained against displacement perpendicular to the longitudinal axis of the plate; wherein the one or more sliding elements are configured for rigid fixation to the bone screws without compressing the bone plate or sliding elements onto a bone surface; and wherein the one or more sliding elements extend past the bone-facing surface of the plate to elevate the plate body over the bone surface when the receiving hole is being compressed onto the bone surface with a non-locking bone screw, which, in conjunction with the elastic suspension of the sliding element, enables controlled motion between the plate and the bone surface.
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Specification