Root canal treatment is needed when the inside of the tooth is infected. This dental procedure intends to remove the infected tooth pulp to prevent the bacterial infection from spreading. The pulp will be removed from the inside, making this treatment painful. Typically, cold sensitivity after root canal means that the procedure has failed. A patient should not feel any sensitivity after the treatment because the treatment involves the elimination of tooth nerves. A trusted dental clinic in West Ryde can help you resolve your problem right away.