Even though our teeth are supposed to last many, many years, there are a variety of reasons why tooth extraction might be necessary. A common reason is because the tooth is damaged, due to injury or decay. Other reasons include: Overcrowding. Sometimes dentists will pull teeth to prepare the mouth for orthodontics. The intention of orthodontics is always to effectively straighten somebody’s teeth, which may not be feasible if teeth are too big or there are too many for your mouth. Additionally, should the teeth be unable to break through the gums (erupt) for the reason that there is not area in the oral cavity to accomodate this, the dentist may support taking such measures. Infection. If the teeth decompose as well as damage the pulp — heart of your teeth containing nerves and blood vessels — bacteria in the mouth may infect the pulp. Generally this can be repaired with root canal therapy, if the infection is so significant that antibiotics are not able to take care of it, tooth extraction might be needed to prevent further infection. Immune system compromised. In case your immune system is going to be significantly sacrificed (for illustration, whenever you will be undergoing chemotherapy or undergoing an organ transplant), risks of infection might be reason enough to extract your teeth. Periodontal Disease an infection of the bones and tissue surrounding the teeth may cause loosening which generally is reason for extraction.