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US 8,764,808 B2Granted
Bone fixation system
OwnerEduardo Gonzalez-Hernandezinventor
Life of this patent
Estimating the term…
Abstract
The invention provides embodiments of a bone fixation system having a bone plate and a specialized screws system. The bone plate includes one or more bi-directional combination holes that can accommodate two bone screws in the same hole, the screws being oriented in non-parallel direction. In accommodating two screws in the same hole, one of the screws has a by-pass head.
Claims29
A bone fixation system adapted to stabilize at least two bone portions of a fractured bone, the bone fixation system comprising:
- a plate having a mid-longitudinal axis, a first end, a second end, a length between said first and second ends, and a width less than and perpendicular to said length, said length being sufficient to overlap the at least two bone portions, said plate having an upper surface, a lower surface, and a thickness between said upper and lower surfaces, said lower surface being opposite said upper surface, the mid-longitudinal axis extending through said first and second ends and along said length of said plate;
- at least one bi-directional hole extending through said plate from said upper surface to said lower surface, said at least one bi-directional hole having a first bone fastener receiving portion, a second bone fastener receiving portion, and a connecting portion between said first and second bone fastener receiving portions, said first bone fastener receiving portion including a central longitudinal axis extending between said upper and lower surfaces, and said second bone fastener receiving portion including a central longitudinal axis extending between said upper and lower surfaces, the central longitudinal axes of said first and second bone fastener receiving portions diverging from one another below said lower surface of said plate, the central longitudinal axes of said first and second bone fastener receiving portions being transverse to a first plane extending along the mid-longitudinal axis of said plate and the first plane being perpendicular to said upper surface of said plate, and the central longitudinal axes of said first and second bone fastener receiving portions extending in second and third planes, respectively, said second and third planes being parallel to one another and crossing the mid-longitudinal axis at different points along said length of said plate, said first and second bone fastener receiving portions being threaded;
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- at least two bone fasteners, each of said at least two bone fasteners including a head portion adapted to engage said plate and a shaft portion adapted to engage the fractured bone, a first bone fastener of said at least two bone fasteners being received and seated in said first bone fastener receiving portion and a second bone fastener of said at least two bone fasteners being received and seated in said second bone fastener receiving portion, said head portions having threads formed thereon, said threads of said head portions of said first and second bone fasteners being adapted to engage said threads of said first and second bone fastener receiving portions, respectively, one of said first and second bone fasteners including a cut-out portion formed on said head portion thereof, said cut-out portion interrupting said threads formed on said head portion of said one of said first and second bone fasteners, said first and second bone fasteners, when received in said first and second bone fastener receiving portions, respectively, being oriented at angles aligned with the central longitudinal axes of said respective first and second bone fastener receiving portions, and diverging from one another below said lower surface of said plate, wherein, when said one of said first and second bone fasteners is seated in one of said first and second bone fastener receiving portions, and said cut-out portion is oriented toward said connecting portion between said first and second bone fastener receiving portions, said cut-out portion allowing passage of said head portion of the other of said first and second bone fasteners into the other of said first and second bone fastener receiving portions, said head of said one of said first and second bone fasteners including said cut-out portion having a cross sectional configuration through said head such that if said cut-out portion is oriented away from said connecting portion between said first and second bone fastener receiving portions when seated in said one of said first and second bone fastener receiving portions, said cross sectional configuration of said head prevents passage of said head portion of the other of said first and second bone fasteners into the other of said first and second bone fastener receiving portions, said head portion of the other of said first and second bone fasteners directly abutting said cut-out portion of said one of said first and second bone fasteners.
1 more element
A bone fixation system adapted to stabilize at least two bone portions of a fractured bone, the bone fixation system comprising:
- a plate having a mid-longitudinal axis, said plate having a first end, a second end, a length between said first and second ends, and a width less than and perpendicular to said length, said length being sufficient to overlap the at least two bone portions, said plate having an upper surface, a lower surface, and a thickness between said upper and lower surfaces, said lower surface being opposite said upper surface, the mid-longitudinal axis extending through said first and second ends and along said length of said plate;
- at least one bi-directional hole extending through said plate from said upper surface to said lower surface, said at least one bi-directional hole having a first bone fastener receiving portion, a second bone fastener receiving portion, and a connecting portion between said first and second bone fastener receiving portions, said first bone fastener receiving portion including a central longitudinal axis extending between said upper and lower surfaces, and said second bone fastener receiving portion including a central longitudinal axis extending between said upper and lower surfaces, the central longitudinal axes of said first and second bone fastener receiving portions diverging from one another below said lower surface of said plate, the central longitudinal axes of said first and second bone fastener receiving portions being offset from one another along said length of said plate, and the central longitudinal axes of said first and second bone fastener receiving portions extending through said upper surface of said plate on opposite sides of the mid-longitudinal axis of said plate, said first and second bone fastener receiving portions being threaded;
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- at least two bone fasteners, each of said at least two bone fasteners including a head portion adapted to engage said plate and a shaft portion adapted to engage the fractured bone, a first bone fastener of said at least two bone fasteners being received and seated in said first bone fastener receiving portion and a second bone fastener of said at least two bone fasteners being received and seated in said second bone fastener receiving portion, said head portions having threads formed thereon, said threads of said head portions of said first and second bone fasteners being adapted to engage said threads of said first and second bone fastener receiving portions, respectively, one of said first and second bone fasteners includes a cut-out portion formed on said head portion thereof, said cut-out portion interrupting said threads formed on said head portion of said one of said first and second bone fasteners, said first and second bone fasteners, when received in said first and second bone fastener receiving portions, respectively, being oriented at angles aligned with the central longitudinal axes of said respective first and second bone fastener receiving portions, and diverging from one another below said lower surface of said plate, wherein, when said one of said first and second bone fasteners is seated in one of said first and second bone fastener receiving portions, and said cut-out portion is oriented toward said connecting portion between said first and second bone fastener receiving portions, said cut-out portion allowing passage of said head portion of the other of said first and second bone fasteners into the other of said first and second bone fastener receiving portions, said head of said one of said first and second bone fasteners including said cut-out portion having a cross sectional configuration through said head such that if said cut-out portion is oriented away from said connecting portion between said first and second bone fastener receiving portions when seated in said one of said first and second bone fastener receiving portions, said cross sectional configuration of said head prevents passage of said head portion of the other of said first and second bone fasteners into the other of said first and second bone fastener receiving portions, said head portion of the other of said first and second bone fasteners directly abutting said cut-out portion of said one of said first and second bone fasteners.
1 more element
A bone fixation system adapted to stabilize at least two bone portions of a fractured bone, the bone fixation system comprising:
- a plate having a mid-longitudinal axis delineating a first side and a second side of said plate, said plate having a first end, a second end, a length between said first and second ends, and a width less than and perpendicular to said length, said length being sufficient to overlap the at least two bone portions, said plate having an upper surface, a lower surface, and a thickness between said upper and lower surfaces, said lower surface being opposite said upper surface, the mid-longitudinal axis extending through said first and second ends and along said length of said plate;
- at least one bi-directional hole extending through said plate from said upper surface to said lower surface, said at least one bi-directional hole having a first bone fastener receiving portion being threaded, a second bone fastener receiving portion being threaded, and a connecting portion between said first and second bone fastener receiving portions, said first bone fastener receiving portion including a first central longitudinal axis extending between said upper and lower surfaces and a first radius measured from the first central longitudinal axis to a first side wall proximate said upper surface, and said second bone fastener receiving portion including a second central longitudinal axis extending between said upper and lower surfaces and a second radius measured from the second central longitudinal axis to a second side wall proximate said upper surface, said first bone fastener receiving portion including a first arcuate portion having a first arc of radius at said upper surface extending continuously around at least 180 degrees on said first side of the mid-longitudinal axis of said plate, said first arcuate portion of said first bone fastener receiving portion beginning on said second side of the mid-longitudinal axis, and said second bone fastener receiving portion including a second arcuate portion having a second arc of radius at said upper surface extending continuously around at least 180 degrees on said second side of the mid-longitudinal axis of said plate, said arcuate portion of said second bone fastener receiving portion beginning on said first side of the mid-longitudinal axis, the first arc of radius of said first arcuate portion intersecting the second arc of radius of said second arcuate portion, said first central longitudinal axis proximate said upper surface being spaced from said second central longitudinal axis proximate said upper surface a distance less than a combination of the first arc of radius and of the second arc of radius;
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- at least two bone fasteners, each of said at least two bone fasteners including a head portion adapted to engage said plate and a shaft portion adapted to engage the fractured bone, a first bone fastener of said at least two bone fasteners being received and seated in said first bone fastener receiving portion and a second bone fastener of said at least two bone fasteners being received and seated in said second bone fastener receiving portion, said head portions having threads formed thereon, said threads of said head portions of said first and second bone fasteners being adapted to engage said threads of said first and second bone fastener receiving portions, respectively, a majority portion of said head of said first bone fastener being provided on said first side of the mid-longitudinal axis of said plate and another portion of said head of said first bone fastener being provided on said second side of said plate and said shaft portion of said first bone fastener being angled toward said second side of the mid-longitudinal axis of said plate, a majority portion of said second bone fastener being provided on said second side of said plate and another portion of said head of said second bone fastener being provided on said first side of said plate and said shaft portion of said second bone fastener being angled toward said first side of said plate, one of said first and second bone fasteners includes a cut-out portion formed on said head portion thereof, said cut-out portion interrupting said threads formed on said head portion of said one of said first and second bone fasteners, said first and second bone-fasteners, when received in said first and second bone fastener receiving portions, respectively, being oriented at angles aligned with the central longitudinal axis of said respective first and second bone fastener receiving portions, and diverging from one another below said lower surface of said plate, wherein, when said one of said first and second bone fasteners is seated in one of said first and second bone fastener receiving portions, and said cut-out portion is oriented toward said connecting portion between said first and second bone fastener receiving portions, said cut-out portion allowing passage of said head portion of the other of said first and second bone fasteners into the other of said first and second bone fastener receiving portions, said head portion of the other of said first and second bone fasteners directly abutting said cut-out portion of said one of said first and second bone fasteners so that said head portion of the other of said first and second bone fasteners blocks rotation of said one of said first and second bone fasteners including said cut-out portion.
1 more element
A bone fixation system adapted to stabilize at least two bone portions of a fractured bone, the bone fixation system comprising:
- a plate having a mid-longitudinal axis delineating a first side and a second side of said plate, said plate having a first end, a second end, a length between said first and second ends, and a width less than and perpendicular to said length, said length being sufficient to overlap the at least two bone portions, said plate having an upper surface, a lower surface, and a thickness between said upper and lower surfaces, said lower surface being opposite said upper surface, the mid-longitudinal axis extending through said first and second ends and along said length of said plate;
- at least one bi-directional hole extending through said plate from said upper surface to said lower surface, said at least one bi-directional hole having a first bone fastener receiving portion being threaded, a second bone fastener receiving portion being threaded, and a connecting portion between said first and second bone fastener receiving portions, said first bone fastener receiving portion including a first central longitudinal axis extending between said upper and lower surfaces and a first radius measured from the first central longitudinal axis to a first side wall proximate said upper surface, and said second bone fastener receiving portion including a second central longitudinal axis extending between said upper and lower surfaces and a second radius measured from the second central longitudinal axis to a second side wall proximate said upper surface, a majority portion of said first bone fastener receiving portion being provided on said first side of said plate and another portion of said first bone fastener receiving portion being provided on said second side of said plate, a majority portion of said second bone fastener receiving portion being provided on said second side of said plate and another portion of said second bone fastener receiving portion being provided on said first side of said plate, said first and second bone fastener receiving portions communicating via said connecting portion, said connecting portion extending across the mid-longitudinal axis of said plate, and said connecting portion adapted to receive portions of at least two bone fasteners;
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- at least two bone fasteners, each of said at least two bone fasteners including a head portion adapted to engage said plate and a shaft portion adapted to engage the fractured bone, a first bone fastener of said at least two bone fastener being received and seated in said first bone fastener receiving portion and a second bone fastener of said at least two bone fasteners being received and seated in said second bone fastener receiving portion, said head portions having threads formed thereon, said threads of said head portions of said first and second bone fasteners being adapted to engage said threads of said first and second bone fastener receiving portions, respectively, a majority portion of said head of said first bone fastener being provided on said first side of the mid-longitudinal axis of said plate and another portion of said head of said first bone fastener being provided on said second side of said plate and said shaft portion of said first bone fastener being angled toward said second side of the mid-longitudinal axis of said plate, a majority portion of said second bone fastener being provided on said second side of said plate and another portion of said head of said second bone fastener being provided on said first side of said plate and said shaft portion of said second bone fastener being angled toward said first side of said plate, one of said first and second bone fasteners includes a cut-out portion formed on said head portion thereof, said cut-out portion interrupting said threads formed on said head portion of said one of said first and second bone fasteners, said first and second bone-fasteners, when received in said first and second bone fastener receiving portions, respectively, being oriented at angles aligned with the central longitudinal axes of said respective first and second bone fastener receiving portions, and diverging from one another below said lower surface of said plate, wherein, when said one of said first and second bone fasteners is seated in one of said first and second bone fastener receiving portions, and said cut-out portion is oriented toward said connecting portion between said first and second bone fastener receiving portions, said cut-out portion allowing passage of said head portion of the other of said first and second bone fasteners into the other of said first and second bone fastener receiving portions, said head portion of the other of said first and second bone fasteners directly abutting said cut-out portion of said one of said first and second bone fasteners so that said head portion of the other of said first and second bone fasteners blocks rotation of said one of said first and second bone fasteners including said cut-out portion.
1 more element
Dependencies are inferred from the claim text.