Just found out i have my very first cavities and i need a root canal! why is that?

Not painful: Cavities are usually asymptomatic unless provoked by high sugar intake. Once the cavity gets to the dentin, the layer between the enamel and the pulp (nerve of the tooth), the cavity can grow very large and deep very quickly and invade the pulp, and kill it , requiring either a root canal or an extraction.

Need a root canal: Dental decay is the most prevalent chronic disease in the world. The root canal treatment is needed for two reasons: infection or damage to the pulp that can't be fixed. Although cavities and root canals can be fixed by the dentist the prevention is the best strategy for your oral health. Good luck.