Rod reducer apparatus for spinal corrective surgery

A technology of spinal rod and reducer, applied in the direction of fixator, internal fixator, fastening device, etc., can solve the problem of high implantation cost and so on
CN102256558AInactive Publication Date: 2011-11-23SYNTHES GMBH
2 Cites 3 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SYNTHES GMBH
Publication Date
2011-11-23
Estimated Expiration
Not applicable Β· inactive patent

Smart Images

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

Abstract

Spinal rod reduction apparatuses, systems, and methods are provided. In various examples, a rod reduction apparatus includes a first threaded member (130, 210, 330) including an engagement feature (138A, 138B, 220, 332, 334) configured to selectively anchor the first threaded member to the implantable screw assembly. A second threaded member (110, 230, 310) is configured to threadably engage with the first threaded member. The second threaded member is axially movable with respect to the first threaded member with rotation of the second threaded member. A spinal rod urging member (120, 240, 320) is axially movable with the second threaded member. The urging member includes a bearing surface (126, 242, 320) that is configured to selectively abut the spinal rod and selectively urge the spinal rod toward the implantable screw assembly with rotation of the second threaded member in a first rotational direction.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] This patent document relates generally to the field of orthopedic surgery. More specifically (but not limitingly), this patent document relates to an apparatus and method for correction of spinal deformities. Background technique

[0002] In the field of spinal surgery, several techniques exist for reducing the spinal rod into posterior pedicle screws. The most basic technique uses a separate rod-resetting instrument (such as a rocker fork or a pawl-type device designed to reset the rod one stage at a time) after insertion. The screw and placement rod are then coupled to the head of the screw, ie to each pedicle screw respectively. Such a segmental reduction technique will generate a large axial load on the pedicle screw.

[0003] Alternatively, the rod can yield to a particular deformity and then seat within an implanted pedicle screw. Once seated, the deformity can be corrected by bending the rod in place. This technique can be time consuming an...

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