Rod group, arcuate rod, s-shaped rod, spine stabilization system, and rod manufacturing method

Abstract

A rod group includes a plurality of first rods that has an arcuate first curve, the first rods having mutually different lengths; and a plurality of second rods that has an S-shaped second curve, the second rods having mutually different lengths. The first rods and the second rods have shapes for treatment of scoliosis by (i) guiding the postoperative apex of the thoracic kyphosis to be located at the thoracic vertebrae T6 to T8, and (ii) guiding a postoperative apex of the thoracic kyphosis to be located at a position different from a preoperative apex of the thoracic kyphosis and the second rod each have a shape extending along an anatomically normal spinal column arrangement.

1 - 18 . (canceled) 
     
     
         19 . A rod group comprising:
 a plurality of first rods having mutually different lengths, each of the plurality of first rods having a shape configured to extend along thoracic kyphosis of an anatomically normal spinal column arrangement with a curved section and a straight section configured to be attached to thoracic vertebrae, or a curved section and reverse curved section configured to be attached to the thoracic vertebrae, and   a plurality of second rods having mutually different lengths, each of the plurality of second rods having a shape configured to extend along thoracic kyphosis and a lumbar lordosis of an anatomically normal spinal column arrangement with a first curved section configured to be attached to the thoracic vertebrae, and a second curved section configured to be attached to lumbar vertebrae,   each of the first plurality of rods and each of the second plurality of rods being configured for treatment of scoliosis by (i) guiding the postoperative apex of the thoracic kyphosis to be located at the thoracic vertebrae T6 to T8, and (ii) guiding a postoperative apex of the thoracic kyphosis to be located at a position different from a preoperative apex of the thoracic kyphosis.   
     
     
         20 . An arcuate rod for treatment of scoliosis comprising a shape configured to extend along thoracic kyphosis of an anatomically normal spinal column arrangement with a curved section and a straight section configured to be attached to thoracic vertebrae, or a curved section and reverse curved section configured to be attached to the thoracic vertebrae,
 the arcuate rod being configured for treatment of scoliosis by (i) guiding a postoperative apex of the thoracic kyphosis to be located at the thoracic vertebrae T6 to T8, and (ii) guiding the postoperative apex of the thoracic kyphosis to be located at a position different from a preoperative apex of the thoracic kyphosis.   
     
     
         21 . The arcuate rod according to  claim 20 , comprising:
 a curved section and a straight section,   wherein a length of the straight section is one quarter to one half a length of the arcuate rod, inclusive.   
     
     
         22 . The arcuate rod according to  claim 20 , comprising:
 a curved section and a reverse curved section that curves in an opposite direction to the curved section,   wherein a length of the reverse curved section is less than or equal to a fifth of a length of the arcuate rod.   
     
     
         23 . An S-shaped rod for treatment of scoliosis comprising:
 a first curved section; and   a second curved section that curves in an opposite direction to the first curved section,   the first curved section having a shape configured to extend along thoracic kyphosis of an anatomically normal spinal column arrangement, the first curved section being configured to be attached to thoracic vertebrae,   the second curved section having a shape configured to extend along lumbar lordosis of an anatomically normal spinal column arrangement, the second curved section being configured to be attached to lumbar vertebrae,   the S-shaped rod having a shape for (i) guiding the postoperative apex of the thoracic kyphosis to be located at the thoracic vertebrae T6 to T8, and (ii) guiding the postoperative apex of the thoracic kyphosis to be located at a position different from a preoperative apex of the thoracic kyphosis.