Spine correction apparatus

A spine correction apparatus, comprising:

• a first rod having a first zone;
• a second rod having a second zone that is configured to contact the first zone;
• a first ring member having a first through-hole;
• and
• a second ring member having a second through-hole,
• wherein, the first rod and the second rod pass through the first through-hole of the first ring member and through the second through-hole of the second ring member, in which the first ring member is fixed to the first rod, and the second ring member is fixed to the second rod;
• the first zone has a plurality of first raised teeth, and the second zone has a plurality of second raised teeth, in which the first raised teeth and the second raised teeth are configured to engage with each other;
• each of the first raised teeth is consist of a first top edge, a first lateral, and a second lateral, in which the first lateral is connected to the second lateral by means of the first top edge, and a first included angle formed between the first lateral and a major axis direction of the first rod ranges between 85 and 95 degrees;
• each of the second raised teeth is consist of a second top edge, a third lateral, and a fourth lateral, in which the third lateral is connected to the fourth lateral by means of the second top edge, and a second included angle formed between the third lateral and a major axis direction of the second rod ranges between 85 and 95 degrees;
• and the second lateral and the fourth lateral are inclines configured to allow relative movement between the first rod and the second rod after the first raised teeth and the second raised teeth engage with each other.