Rod system for gradual dynamic spinal fixation

摘要

A rod system includes two rods each with a head and a shaft, two elastic members each fitted around one shaft against one head, and a case defining a first inner portion, a second inner portion, and a third inner portion in communication with the first and the second inner portions. A first rod with a first elastic member is seated in the first inner portion so the first elastic member abuts the bottom of first inner portion and the first head protrudes into the third inner portion. A second rod and a second elastic member is seated in the second portion so the second elastic member abuts the bottom of the second inner portion and the second head protrudes into the third inner portion and abuts the first head.

主权项

1. A rod system, comprising:
a first rod having a first head and a first shaft; a first elastic member fitted around the first shaft and against the first head; a second rod having a second head and a second shaft; a second elastic member fitted around the second shaft and against the second head; an absorbable material that can be decomposed by bodily fluid; and a case defining:
a first inner portion with a first outer opening;a second inner portion with a second outer opening; anda third inner portion in communication with the first and the second inner portions; wherein:
the first rod with the first elastic member is seated in the first inner portion so the first elastic member abuts the bottom of the first inner portion and the first head protrudes into the third inner portion; andthe second rod with the second elastic member is seated in the second portion so the second elastic member abuts the bottom of the second inner portion and the second head protrudes into the third inner portion and abuts the first head.