Medos International Sarl

Depuy Synthes Products, Inc.

Depuy Spine, Inc.

Depuy Spine Sarl

Simon Siu

Nam T Chao

Randal R Betz

James Donahue

Ronald Sacher

Peter O Newton

James R Donahue

Dennis Hubbard

Jerold P Gurley

Chris Rybicki

Christopher Rybicki

Ronald L Sacher

Newton Peter

Betz Randal

A bone screw assembly includes an anchor portion and a head portion, such as a rod-receiving portion, movably mounted to the anchor portion to allow for controlled angulation between the anchor portion and the head portion. The anchor portion is pivotable in one or more selected directions about an axis relative to the head portion. A restriction member, which may be a rod seat, prevents the anchor portion from pivoting in one or more different directions about another axis relative to the head portion and/or a spinal fixation element received in the head portion. The restriction member may be inserted in the head portion to control direction that the anchor portion pivots relative to the head portion. The restriction member may also serve as a compression member and/or rod seat for seating a spinal rod coupled to the bone screw assembly.

Constrained motion bone screw assembly

A method for manipulating a vertebra includes connecting a first bone anchor to a first vertebra, connecting a second bone anchor to a second bone anchor, positioning a spinal rod in a receiving member of the first bone anchor and in a receiving member of the second bone anchor, connecting a first instrument to the receiving member of the first bone anchor, and manipulating the first instrument to rotate first bone anchor and the first vertebra relative to the second vertebra.

Instruments and methods for manipulating vertebra

Instruments and methods for manipulating a vertebra

Growing community of inventors

Quincy, MA, United States of America

Simon Siu