Trauma to your tooth or teeth can lead to the need for root canal treatment. Not all teeth fractured as a result of trauma will need a root canal treatment. Occasionally where a tooth is fractured as a result of trauma, the adjacent tooth will have received much the same force and will subsequently die and need a root canal treatment, whereas the tooth that fractured may remain vital, as the act of fracturing dissipates the force on the tooth.
Trauma cases need to be monitored carefully and often no treatment is required. Where necessary, there are specific treatments based on the extent of the damage to the tooth and/or jaw, the age of the patient, whether the tooth remains alive or not.
If the tooth was avulsed, (knocked out completely) treatment and prognosis would depend on how long the tooth was out of the mouth and whether or not the tooth was kept moist (milk is the commonest readily available solution).
Wear and tear on teeth, from clenching or grinding can cause hairline cracks to occur in teeth. Over time these cracks can allow sufficient bacteria to contact the pulp, leading to reversible or irreversible inflammation. In the case of irreversible inflammation, a root canal treatment would be indicated. (in the case of reversible inflammation, a crown or occasionally a large filling can resolve the symptoms).
Dental procedures can exert an effect on your tooth. Over time, a tooth that has had significant treatment, maybe several fillings, possibly a crown, combined with wear and tear, is more likely to need a root canal treatment.
Remember, there is nothing as good as your own tooth. After root canal treatment, most back teeth will require a crown , to prevent chewing and grinding forces being transmitted directly to the root, which could cause the root to fracture vertically, leading to the loss of the tooth. Many front teeth can be restored with a large restoration (filling) after root canal treatment, as these teeth are less likely to fracture, being used for biting rather than chewing.