Root canal treatment is a dental procedure that relieves pain caused by an infected or abscessed tooth. During the root canal process, the inflamed pulp is removed. The surfaces inside the tooth are then cleaned and disinfected, and a filling is placed to seal the space. Root canal therapy is necessary when oral bacteria invade the pulp inside of your tooth.Root canals treatment are safe and effective.A root canal treatment is used to repair the damaged inside of a tooth. A root canal treatment can save a badly infected or damaged tooth. The tooth may have become infected or damaged by decay, repeated dental work, wear and tear, gum disease, cracked fillings or an injury to the tooth. It involves drilling a hole into the tooth and removing the soft centre, known as the dental pulp.