A trauma to your tooth may result in a horizontal root fracture and, in such cases, the likelihood of success depends on the location of the fracture in the root. The closer the fracture to the tip of the root, the greater the chances of success. Fractures close to the gum line are least successful.
Root canal treatment is usually but not always necessary following a root fracture. Also, stabilisation with a splint may be required to help the fracture to heal. This injury is not common.