When a tooth is cracked or severely decayed, it can lead to an exposed root or pulp, which can lead to infection and inflammation and cause quite a bit of pain and sensitivity to a tooth. When this happens, a root canal treatment is often recommended. This treatment is the best way to relieve pain and prevent losing the tooth as well. The procedure’s aim is to remove any inflamed or infected pulp from the tooth, prevent further infection, and protect the tooth from further damage. Root canal treatment is highly successful when it comes to preserving natural teeth at a rate of 95% or more. A root canal treatment, when needed, can restore your smile to its normal look and feel and prevent the need for a dental implant.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2819000/#R17