Bone fixation screw system
First Claim
1. A bone screw comprising:
- a first part of a resorbable material for threaded connection of the bone screw within a bone, said first part having a first mating surface; and
a second part made from a stronger non-resorbable material, said second part having a second mating surface, said first mating surface and said second mating surface each having mating contoured surfaces, said first mating surface is torsionally locked with said second mating surface and said first mating surface is axially locked with said second mating surface in a first axial direction and a second axial direction, whereby torsional and axial movement of said first part relative said second part is inhibited.
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Accused Products
Abstract
A bone fixation screw system and method of utilization thereof is provided for a bone having first and second sections with a fracture interface there between. A preferred embodiment of the bone fixation screw system includes a side plate having a first part for placement adjacent the bone second section and a second part angled from the first part providing a barrel. The barrel is adapted for insertion into a transsectionally extending bore into the bone in at least the second section of the bone. A lag screw is also provided for positional retention of the first section of the bone with respect to the second section of the bone. The lag screw also has a first part of a resorbable material for threaded connection of the lag screw within the bore of the bone in at least the first section of the bone, the lag screw having a second part connected with the first part made from a stronger nonresorbable material. The present invention also provides a bone screw having a resorbable material for a threaded first part. The bone screw first part is connected to a nonresorbable bone screw second part.
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Citations
20 Claims
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1. A bone screw comprising:
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a first part of a resorbable material for threaded connection of the bone screw within a bone, said first part having a first mating surface; and a second part made from a stronger non-resorbable material, said second part having a second mating surface, said first mating surface and said second mating surface each having mating contoured surfaces, said first mating surface is torsionally locked with said second mating surface and said first mating surface is axially locked with said second mating surface in a first axial direction and a second axial direction, whereby torsional and axial movement of said first part relative said second part is inhibited. - 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. A method of treating a bone with first and second sections separated by an interface there between with a bone screw comprising:
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drilling a transsectionally extending bore through the bone penetrating into the first and second sections; threadingly connecting within the transsectionally extending bore of the first bone section, a bone screw with a first part having a male thread of resorbable material and a bone screw second part connected with the first part of a second stronger nonresorbable material having a head at a rear end urging against the second bone section; and at least allowing the resorbable first part of the bone screw first part to partially dissolve before removing the bone screw.
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20. A method of treating a bone with an affixed plate with a bone screw comprising:
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drilling a bore through the bone penetrating into the bone; threadingly connecting within the bore of the bone, a bone screw with a first part having a male thread of resorbable material and a bone screw second part connected with the first part of a second stronger nonresorbable material, the second part having a head at a rear end urging against the plate; and at least allowing the resorbable first part of the bone screw first part to partially dissolve before removing the bone screw.
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Specification