Patent ID: 8979906
Filing Date: 2015-03-17
Classification: A61B

Abstract:
1. A spine rod clamping body for a pedicle screw assembly, comprising: a spine rod mounting; a bone screw connecting portion; and an elastically deformable portion connected between the spine rod mounting portion and the bone screw connecting portion, wherein the elastically deformable portion, the bone screw connecting portion and the spine rod mounting portion are all concentric about a common central axis, wherein the elastically deformable portion includes a plurality of spaced apart ring structures and a circular bridge structure, wherein each one of the spaced apart ring structures has a semi-circular cross sectional profile, wherein the circular bridge structure joins adjacent ones of the spaced apart ring structures such that adjacent ones of the spaced apart ring structures and the circular bridge structure therebetween jointly form a structure that is elastically deformable, wherein each one of the spaced apart ring structures and the circular bridge structure have a u-shaped cross-sectional profile such that the circular bridge structure and each adjacent one of the spaced apart ring structures form a respective S-shaped bellow structure, and wherein a size of the u-shaped cross-sectional profile of the circular bridge structure is substantially less than a size of the u-shaped cross-sectional profile of each adjacent one of the spaced apart ring structures.