Back to results
US 8,906,076 B2Granted
Angulated locking plate and screw
AssigneeOsteoMed LLC
InventorsViorel Mocanu, Joel Bales
Life of this patent
Estimating the term…
Abstract
An improved fixation plate using at least a double helix screw as disclosed. The double helix screw may include alternate embodiments comprising three, four, or more threads. The helix thread screw intertwines with double helix thread in the screw hole of the fixation plate providing enhanced fixation to a fractured bone.
Claims17
A system for lockably engaging bone screws into a fixation plate, comprising:
- a locking fixation plate including a threaded screw hole defined by an inner surface surrounding the threaded screw hole, the inner surface comprising an upper countersink and a threaded portion, the threaded portion comprising a pair of threads arranged in a double helix configuration, wherein an end of a first thread of the pair of threads, proximate the upper countersink, is approximately 180° from an end of a second thread of the pair of threads;
- and
- a screw comprising a generally conical head tapering into a generally cylindrical shaft that ends at a tip and at least two threads arranged in a helix configuration beginning near the tip and extending along the generally cylindrical shaft and onto the generally conical head, a thread height of each thread being generally constant over a majority of the generally cylindrical shaft and tapering as the thread extends onto the head,
- wherein the portion of the threads disposed on the generally conical head is configured to interfere with the pair of threads disposed on the inner surface of the screw hole once the screw is screwed into the screw hole to lock the screw into the screw hole.
1 more element
A system for lockably engaging bone screws into a fixation plate, comprising:
- a locking fixation plate including a threaded screw hole defined by an inner surface surrounding the threaded screw hole, the inner surface comprising an upper countersink and a threaded portion, the threaded portion comprising a pair of threads arranged in a double helix configuration, wherein at least a portion of the double helix configuration is cylindrical;
- and
- a screw comprising a generally conical head tapering into a generally cylindrical shaft that ends at a tip and at least two thread arranged in a helix configuration beginning near the tip and extending along the generally cylindrical shaft and onto the generally conical head, a height of each thread being generally constant over a majority of the generally cylindrical shaft and tapering as each such thread extends onto the head,
- wherein the portion of the threads disposed on the generally conical head is configured to interfere with the pair of threads disposed on the inner surface of the screw hole once the screw is screwed into the screw hole to lock the screw into the screw hole.
1 more element
A system for lockably engaging bone screws into a fixation plate, comprising:
- a locking fixation plate including a threaded screw hole defined by an inner surface surrounding the threaded screw hole, the inner surface comprising an upper countersink and a threaded portion, the threaded portion comprising a pair of threads arranged in a double helix configuration, wherein at least a portion of the double helix configuration is cylindrical;
- and
- a screw comprising a generally conical head tapering into a generally cylindrical shaft that ends at a tip and at least two thread arranged in a helix configuration beginning near the tip and extending along the generally cylindrical shaft and onto the generally conical head, a height of each thread being generally constant over a majority of the generally cylindrical shaft and tapering as each such thread extends onto the head,
- wherein the portion of the threads disposed on the generally conical head is configured to interfere with the pair of threads disposed on the inner surface of the screw hole once the screw is screwed into the screw hole to lock the screw into the screw hole,
- wherein each thread of the screw comprises a thread root and the thread height of a portion of each thread disposed on the head is shallow enough to enable the portion of the root of that same thread disposed on the head to contact the pair of threads disposed on the inner surface of the screw hole when the screw is screwed into the screw hole.
2 more elements
Dependencies are inferred from the claim text.