Source: https://patents.justia.com/patent/20080091198
Timestamp: 2020-03-28 15:54:09
Document Index: 340011868

Matched Legal Cases: ['Art 577', 'Art 510', 'Art 438', 'Art 419', 'Art 468', 'Art 312']

US Patent Application for Bone Fusion Plate Patent Application (Application #20080091198 issued April 17, 2008) - Justia Patents Search
Justia Patents US Patent Application for Bone Fusion Plate Patent Application (Application #20080091198)
Dec 6, 2007 - MAYO Foundation for Medical Research and Education
FIG. 19a is a detailed view of the thread structure of the bone screw of FIG. 19;
FIG. 19b is a detailed view of the head of the bone screw of FIG. 19;
Threaded portion 116 includes threads 122. As best seen in FIG. 19a, threads 122 include distal face 124 on a side distal to head 104, and proximal face 126. As can be seen in FIG. 19a, distal face 124 is angled more steeply than proximal face 126. Desirably distal face 124 is angled about twenty-five degrees to a normal from shaft 106, and proximal face 126 is angled about three degrees. Threads 122 also define radiused edge 128. If shaft 106 is smaller in diameter than conventional bone screws as discussed above threads 122 may be deeper thus increasing holding power of bone screws 102.
In one embodiment of the invention one or more of fusion plates 30 is supplied as art of a surgical bone fusion kit 130 depicted in FIGS. 21-26. Bone fusion kit 130 includes one or more fusion plates 30, burr 86, bone screws 102, housing 132, K-wire dispenser 134, depth gauge 136, screw selector/dispenser 138; K-wires 140, and slider 142. Referring to FIGS. 21 and 22, fusion plates 30 of various sizes are secured to slider 142. Fusion plates 30 may be secured to slider by an interference snap fitting 144. Fusion plates 30 may be removed from snap fitting 144 by lifting to overcome the interference tension of snap fitting 144.
Prior Prior Trial Invention Art Location Invention Art Ratio 1 715.6 577.0 1 715.6 419.9 1.70 2 559.0 510.9 2 707.3 577.0 1.23 3 497.4 438.9 3 559.0 468.0 1.19 4 707.3 419.9 4 443.8 510.9 0.87 5 443.8 468.0 5 497.4 312.3 1.59 6 395.0 312.3 6 395.0 438.9 0.90 Average 553.0 454.5 Average 1.25 Std Dev 134.4 89.5 Std Dev 0.35 T-test 95% Cl 0.362
p = 0.1658 Cl [0.89, 1.61]
Specimen Location* Screw Max Force (N) 1 1 Invention 715.6 1 2 Prior Art 577.0 1 3 Invention 559.0 1 4 Prior Art 510.9 1 5 Invention 497.4 1 6 Prior Art 438.9 2 1 Prior Art 419.9 2 2 Invention 707.3 2 3 Prior Art 468.0 2 4 Invention 443.8 2 5 Prior Art 312.3 2 6 Invention 395.0
placing a shallow curved plate into the depression, the plate having a top face and a bottom face, the bottom face being convex, the plate defining at least one round screw hole therethrough and at least one elongate slotted aperture there through, the at least one elongate slotted aperture having a long axis and being oriented such that the long axis extends from peripherally to centrally relative to the plate and the slotted aperture further being shaped such that it receives the head of the bone screw more deeply therein at a central end thereof than at a peripheral end thereof thereby causing the bone screw t transit centrally as the head of the bone screw is more deeply received;
Publication number: 20080091198
Inventors: David Leibel (Princeton, MN), William Cooney (Rochester, MN), Ronald Linscheid (Rochester, MN), Richard Berger (Rochester, MN)
Application Number: 11/951,730
Current U.S. Class: 606/60.000; 606/73.000; 606/85.000
International Classification: A61B 17/58 (20060101); A61B 17/00 (20060101); A61B 17/56 (20060101);