In other embodiments, other cross-sectional shapes may be used, such as square, oval, curved, or a curved rectangle that approximates the cross-sectional shape of the plate. The sliding element 3 with a threaded through hole 14 resides in the recess 5.
In certain embodiments the elastic suspension of two or more receiving holes and the plate is practiced on one side of a fracture, while the corresponding bone segment is attached to static receiving holes. More recently, locking plates have been introduced, which typically have threaded receiving holes for positive, angle-stable fixation of locking screws that have a correspondingly threaded screw head.
The device ofwherein the receiving hole in the sliding element is cylindrical.
In addition to preventing metal-on-metal contract and abrasive wear, this elastic confinement of the sliding element facilitates engagement of threaded screw heads into the sliding element, especially in the case where a screw is inserted not exactly parallel to the axis of the screw hole in the sliding element.
Elastic fixation furthermore reduces bone resorption and porosis caused by stress-shielding due to overly rigid fixation constructs. See for example FIGS.
This difference in longitudinal dimension determines the permissible axial motion Elastic plate osteosynthesis sliding element 3 relative to plate 1. The device of claim 3wherein the spring elements are comprised of integrated springs that are part of a plate segment adjacent to the sliding element.
However, precise reduction and absolute stable fixation has its biological price. A method of claim 1where Elastic plate osteosynthesis receiving holes are suspended to preferentially permit translation relative to the bone plate along the longitudinal axis of the plate while substantially constraining motion of the one or more receiving holes in a direction that is perpendicular to the upper or bone-facing surface of the bone plate.
Embodiments are illustrated by way of example and not by way of limitation in the figures of the accompanying drawings.
In another embodiment, the threaded receiving hole in the sliding element is conical. The elastomer lumen 26 is shown surrounding the sliding element 3. The bone screws with threaded heads can be rigidly fixed to the threaded receiving holes in the sliding elements without compressing the bone plate onto the bone surface.
The sliding element is generally bar-shaped and of rectangular cross-section. In other words, in certain embodiments, the sliding element is assembled into the plate and the silicone is molded to bond them together. In certain embodiments 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 relative motion between the plate and the bone surface.
Hence, based on the stiffness and pre-load of the spring elements, external compressive force in excess of a predetermined threshold of between N, preferably N will not yield additional motion of sliding elements 3 inside the plate.
U-shaped nails like the Kuentscher nail, nails of triangulated shape , of square shape , or nails with distal and proximal interlocking , were invented. The amount of fracture site motion is controlled by the maximal extent of slider translation inside recess 5 of plate 1.
The inclusion criterion was displaced diaphyseal fracture of humerus between 21 and 75 years and who consented to participate in the study. In the last decade the demand for care at the clinic for small animals has multiplied.
The through-holes 4 may be oriented substantially perpendicular to the upper surface of bone plate 1. This arrangement allows for a larger core diameter in screw head 13 compared to screw shaft 12, making the thread appear denser.
In another embodiment the spring elements may be separate from the sliding element.
Sliding elements 3 reside below the surface of bone plate 1 in a manner that the threaded through-hole 4 of the sliding element coincides with the elongated plate hole 2 of bone plate 1.
Ensuring that the screw head readily engages into the threaded hole of the sliding element also prevents pre-loading of the sliding element inside the bone plate. The mean age was 39 years range: Ensuring that the screw head readily engages into the threaded hole of the sliding element also prevents pre-loading of the sliding element inside the bone plate.
Upon load removal, the sliding element returns to its defined resting position. The surgery time, radiation exposure, and time for union was noted. In other embodiments the elastomer has voids which can further reduce the effective stiffness of the system by increasing the compressibility of the elastomer.
For example, if the sensor measures displacement, then one would expect as the bone healed, the displacement of the parts would decrease with time. In certain embodiments the spring elements are comprised of integrated springs formed by an elastic structure or material that is part of the sliding element.
The mean age was 39 years range:Aug 08, · 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 i. 1. Unfallchirurg.
Nov;99(11) [Elastic plate osteosynthesis]. [Article in German] Tscherne H, Krettek C. PMID: [PubMed - indexed for MEDLINE]. ) Inventor Michael Bottlang Steven M. Madey Kyle Wirtz Stanley Tsai Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes n.
Results of internal elastic plate osteosynthesis of simple femoral shaft fractures in polytraumatized patients. An alternative procedure. EPO stands for Elastic Plate Osteosynthesis.
EPO is defined as Elastic Plate Osteosynthesis rarely. EPO stands for Elastic Plate Osteosynthesis. Find. Examples: NFL, NASA, PSP, HIPAA.
Tweet. What does EPO stand for? EPO stands for Elastic Plate Osteosynthesis. Advertisement: This definition appears rarely. See. The Elastic Bridge Plating of the Forearm Fracture: A Prospective Study. et al. Elastic Bridge Plating of the Forearm Fracture.
the biologic elastic plate osteosynthesis .Download