A root canal procedure is done to preserve tooth structure or support a bridge when the nerve has been infected or damaged. When a root canal (endodontic therapy) is done, the nerve and blood vessels are removed from the tooth and the inside chamber and wall space are cleaned out and filled in with a sealant material. Often bacteria remain in microscopic branches (dentinal tubules) off the main space. Their toxic wastes can enter the blood stream and have an adverse effect on distant and unrelated areas of the body. When a root canal is the best of a set of imperfect alternatives, the biological root canal treatment will minimize toxicity with ozone and uses materials that are biocompatible for the patient. Lasers, homeopathic remedies, enzyme therapies, and other alternative treatments help to minimize growth of pathogens.