During the time that the tooth had a toothache, the pulp (nerve) inside the tooth was severely inflamed and infected causing the death and necrosis of the pulp. It no longer hurts because following an inflammatory challenge, the pulp may have died and become chronically inflamed showing little or no symptoms. However, the infection remains … Continue reading I had a toothache in the past, but my tooth doesn’t hurt anymore-why do I need a Root Canal Treatment?