Pulp regeneration, first visit

D3355. The first visit of a treatment that tries to regrow living tissue inside a young tooth.

A young adult tooth whose root has not finished growing cannot get a normal root canal. These multi-visit treatments place medicine inside the root to help it close or keep growing, then finish the root canal later.

In a young adult tooth the tip of the root is still open, so there is nothing for a normal filling to seal against. Medicine is sealed inside the tooth for weeks or months to encourage the root to close or keep growing, with visits in between to change it, and the root canal is finished once there is a wall to seal to. Most plans file this as Major. What they actually pay varies by plan.