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  Concentric interior insert ball and dual socket jointRelated Patent Categories: Prosthesis (i.e., Artificial Body Members), Parts Thereof, Or Aids And Accessories Therefor, Implantable Prosthesis, Bone, Spine BoneThe Patent Description & Claims data below is from USPTO Patent Application 20070162133. Brief Patent Description - Full Patent Description - Patent Application Claims
RELATED APPLICATIONS [0001] This application is continuation in part of U.S patent application Ser. No. 11/207,683 filed Aug. 18, 2005 which is a continuation in part of U.S. patent application Ser. No. 11/060,206 filed Feb. 15, 2005 which is a continuation-in-part of a U.S. patent application Ser. No. 11/025,656, filed Dec. 28, 2004 which is a continuation-in-part of U.S. application Ser. No. 10/793,433 now 7,083,651 which is a continuation-in-part of U.S. application Ser. No. 10/792,399 now U.S. Pat. No. 7,115,144; the contents of which is incorporated herein by reference. FIELD OF THE INVENTION [0002] This invention relates to orthopedic surgery and, in particular, constrained spinal implants for replacement of ruptured or excised spinal disks. BACKGROUND OF THE INVENTION [0003] Several attempts have been made to design a spinal prosthesis for replacement of missing or excised disk material that replicates the functions of the missing tissue. U.S. Pat. No. 4,759,769 to Hedman et al discloses an artificial disk device in which two plates are attached to the adjacent vertebrae by bone screws inserted through flanges on the plates. A spring biasing mechanism is captured between the plates to simulate the actions of the natural disk material. U.S. Pat. No. 5,246,458 to Graham and U.S. Pat. No. 6,228,118 to Gordon disclose other intervertebral implants with spherical flanges used to connect the device to adjacent vertebra. Graham also teaches a resilient structure. [0004] The patents to Marnay, U.S. Pat. No. 5,314,477, Buttner-Janz et al, U.S. Pat. No. 5,401,269, Yuan et al, U.S. Pat. No. 5,676,701, and Shelokov, U.S. Pat. No. 6,039,763, all are directed to the design of the opposing faces of the adjacent plates of an implant to provide a limited universal joint to simulate the natural movement of the spine. [0005] U.S. Pat. No. 5,683,465 to Shinn et al teaches two plates with bow shaped skirts which are interlocked. SUMMARY OF THE PRESENT INVENTION [0006] The invention is directed to a constrained spinal implant for insertion between adjacent vertebrae to function as a disk prosthesis. The prosthesis is formed from two plates fastened to adjacent vertebrae facing each other. The facing sides of the plates have an interacting, depending skirt. The skirts are range limiting wherein the skirt on a superior endplate can be shaped to limit lateral, flexion and extension motion. [0007] A depression is centrally located between the arcs of both plates. A sphere or ball is placed in the central depression of one of the plates. The plates are oriented to each other at 90 degrees and the ball is engaged in the depression of the other plate. The plates are then rotated about 90 degrees and the skirt of one plate interlocks with an opposed arcs of the other plate to prevent separation in the axial direction. [0008] Therefore, it is an objective of this invention to provide a constrained spinal implant for axial support of the spinal column which replicates the dimensions and function of an intervertebral disk. [0009] It is another objective of this invention to provide a kit including all the components for assembly and surgical placement of an artificial spinal disk. [0010] It is a further objective of this invention to provide a method of assembly of the components of the kit which results in an axially interlocked constrained spinal implant. Specifically, one plate forms a receptacle for a dynamic socket to be inserted and fixed in place internally. [0011] It is yet another objective of this invention to provide a ball and socket joint between two plates attached to adjacent vertebrae permitting axial rotation, lateral bending, vertical tilting and axial compression. [0012] It is a still further objective of this invention to provide shaped interrupted skirts on two plates which act as stop limits for tilting and bending. [0013] It is another objective of this invention is to provide an axially resilient ball and socket joint, compressive load bearing poly-axial motion joint. [0014] It is another objective of this invention is to provide use of a true roller-ball bearing which reduces radial friction forces and the entire spherical ball surface area can be utilized for low wear characteristics. [0015] Still another objective of this invention is to provide the use of an endplate that can be shaped to limit lateral, flexion and extension motion. [0016] Still another objective of this invention is to provide a constrained construct implant. [0017] Still another objective of this invention is to provide an inserter instrument. [0018] Other objectives and advantages of this invention will become apparent from the following description taken in conjunction with the accompanying drawings wherein are set forth, by way of illustration and example, certain embodiments of this invention. The drawings constitute a part of this specification and include exemplary embodiments of the present invention and illustrate various objects and features thereof. BRIEF DESCRIPTION OF THE DRAWINGS [0019] FIG. 1 is a perspective view of the concentric spinal disc of this invention; Continue reading... Full patent description for Concentric interior insert ball and dual socket joint Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Concentric interior insert ball and dual socket joint patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Concentric interior insert ball and dual socket joint or other areas of interest. ### Previous Patent Application: Adjustable insertion device for a vertebral implant Next Patent Application: End device for a vertebral implant Industry Class: Prosthesis (i.e., artificial body members), parts thereof, or aids and accessories therefor ### FreshPatents.com Support Thank you for viewing the Concentric interior insert ball and dual socket joint patent info. IP-related news and info Results in 0.29393 seconds Other interesting Feshpatents.com categories: Daimler Chrysler , DirecTV , Exxonmobil Chemical Company , Goodyear , Intel , Kyocera Wireless , |
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