Polyaxial bone anchors with pop-on shank, fully constrained friction fit retainer and lock and release insert

a technology of polyaxial bone and pop-on shank, which is applied in the field of spinal surgery, can solve the problems of collective structure and weak respect, and achieve the effects of good rotational stability, easy use and inexpensive production
US20160228153A9Active Publication Date: 2016-08-11JACKSON ROGER P
33 Cites 0 Cited by

Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
JACKSON ROGER P
Publication Date
2016-08-11

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

A polyaxial bone screw assembly includes a threaded shank body having an integral upper portion receivable in an integral receiver, the receiver having an upper channel for receiving a longitudinal connecting member and a lower cavity cooperating with a lower opening. The receiver can have crimp tabs, but is devoid of spring tabs and collet-like flexible structures. A down-loadable compression insert (some with lock and release feature), a down-loadable friction fit split retaining ring having super structure for temporary friction fit with an up-loadable shank upper portion cooperate to provide for pop- or snap-on assembly of the shank with the receiver either prior to or after implantation of the shank into a vertebra. The shank and receiver once assembled cannot be disassembled.
Need to check novelty before this filing date? Find Prior Art

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application is a continuation of U.S. patent application Ser. No. 13 / 317,387, filed Oct. 19, 2011, now U.S. Pat. No. ______, which claims the benefit of U.S. Provisional Patent Application Ser. No. 61 / 455,482 filed Oct. 21, 2010 that are each incorporated by reference herein. This application is also a continuation-in-part of U.S. patent application Ser. No. 12 / 924,802 filed Oct. 5, 2010 that claims the benefit of the following U.S. Provisional Patent Application Ser. Nos. 61 / 278,240, filed Oct. 5, 2009; 61 / 336,911, filed Jan. 28, 2010; 61 / 343,737 filed May 3, 2010; 61 / 395,564 filed May 14, 2010; 61 / 395,752 filed May 17, 2010; 61 / 396,390 filed May 26, 2010; 61 / 398,807 filed Jul. 1, 2010; 61 / 400,504 filed Jul. 29, 2010; 61 / 402,959 filed Sep. 8, 2010; 61 / 403,696 filed Sep. 20, 2010; and 61 / 403,915 filed Sep. 23, 2010, all of which are incorporated by reference herein. This application is also a continuation-in-part of U.S. patent appli...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More