Patent EP0266146A2 successfully refreshed from Google Patents.
EP0266146A2
Expired / Lapsed
EP
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Absorbable bone plate
Assignee: Kenvue Brands LLC
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Filing: 1987-10-26
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Granted: —
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Expires: 2007-10-26
Abstract
Abstract An absorbable bone plate resistant to breakage fabricated with such interrelated dimensions that the stresses developed along the length of the plate when the plate is implanted are relatively constant and do not vary by more than 20% and preferably do not vary by more than 10%.
Inventors
- 👤 Deger Tunc
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 13:30
CPC Classifications
A; A61; A61L; A61L31/00; A61L31/14; A61L31/148; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/80; A61L31/04; A61L31/06; C; C08; C08L; C08L67/00; C08L67/04; A61B17/84; A61B17/86; A61B2017/00004
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
312 words
An absorbable bone plate comprising an elongated bar-like body having a lower surface, an upper surface, opposite sides and opposite ends, a plurality of screw holes extending through said plate from the upper surface through the lower surface, the width of the plate being extended around the screw holes as a reinforcement and in which the thickness of the plate is extended on the upper surface of the plate in an arcuate shape around the screw holes as a reinforcement area so that the stresses developed around the screw holes on implantation are not significantly greater than the highest stresses developed in any unreinforced area of the plate, and in which the dimensions of the plate meet the limitations: where: W is one half the width of the unreinforced plate R is the radius of the side reinforcement of the plate measured from the centerline of a screw hole r is the radius of the top reinforcement of the plate measured from a point on the centerline of a screw hole dʹ₂ is the distance from the centerline of the screw hole to the point where the top reinforcement intersects the unreinforced top of the plate d₂ is the distance from the transverse centerline of the screw hole to the point where the side reinforcement intersects the unreinforced side the plate L is the distance between adjacent screw holes measured from the screw hole centerlines R₁ is the radius of the countersink measured from the screw hole centerline r₂ is the radius of curvature of the bottom of the plate k is the minimum unreinforced thickness of the plate measured from the top of the radius of curvature of the bottom of the plate to the unreinforced top of the plate T is the unreinforced plate thickness at the side edge of the plate h if the difference between T and k.
Claim 2
Dependent Claim
312 words
An absorbable bone plate comprising an elongated bar-like body having a lower surface, an upper surface, opposite sides and opposite ends, a plurality of screw holes extending through said plate from the upper surface through the lower surface, the width of the plate being extended around the screw holes as a reinforcement and in which the thickness of the plate is extended on the upper surface of the plate in an arcuate shape around the screw holes as a reinforcement area so that the stresses developed around the screw holes on implantation are not significantly greater than the highest stresses developed in any unreinforced area of the plate, and in which the dimensions of the plate meet the limitations: where: W is one half the width of the unreinforced plate R is the radius of the side reinforcement of the plate measured from the centerline of a screw hole r is the radius of the top reinforcement of the plate measured from a point on the centerline of a screw hole dʹ₂ is the distance from the centerline of the screw hole to the point where the top reinforcement intersects the unreinforced top of the plate d₂ is the distance from the transverse centerline of the screw hole to the point where the side reinforcement intersects the unreinforced side the plate L is the distance between adjacent screw holes measured from the screw hole centerlines R₁ is the radius of the countersink measured from the screw hole centerline r₂ is the radius of curvature of the bottom of the plate k is the minimum unreinforced thickness of the plate measured from the top of the radius of curvature of the bottom of the plate to the unreinforced top of the plate T is the unreinforced plate thickness at the side edge of the plate h if the difference between T and k.
Claim 3
Dependent Claim
29 words
The bone plate of Claim 1 in which the top of the reinforced area of the plate around the screw holes is flattened and countersunk around the screw holes.
Claim 4
Dependent Claim
21 words
The bone plate of Claim 1 or claim 2 in which the top reinforced area is a section of a sphere.
Claim 5
Dependent Claim
33 words
The bone plate of Claim 1 or claim 2 in which the top reinforced area is a section of the right cylinder having an axis along the transverse centerline of the screw hole.
Claim 6
Dependent Claim
58 words
The bone plate of any one of claims 1 to 4 in which the stresses in the plate across a screw hole where the plate is attached to bone is not different by more than 20% from the stresses developed anywhere else in the plate up to the next screw hole when the plate is subjected to force.
Claim 7
Dependent Claim
53 words
The bone plate of claim 5 in which the stresses in the plate across a screw hole where the plate is attached to bone is not different by more than 10% from the stresses developed anywhere else in the plate up to the next screw hole when the plate is subjected to force.
References Cited (Backward Citations)
No citation records indexed.
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