Reasons for Extracting Teeth
A crowded mouth
Sometimes dentists extract teeth to prepare the mouth for orthodontics. The goal of orthodontics is to properly align the teeth, which may not be possible if your teeth are too big for your mouth. Likewise, if a tooth cannot break through the gum (erupt) because there is no room in the mouth for it, your dentist may recommend extraction.
Risk of infection
If your immune system is compromised (for example, if you are receiving chemotherapy or are having an organ transplant) even the risk of possible infection in a particular tooth may be reason to remove the tooth.
Infection
If tooth decay or damage extends to the pulp — the centre of the tooth containing nerves and blood vessels — bacteria in the mouth can enter the pulp, leading to infection.
Gum Disease
If periodontal disease — an infection of the tissues and bones that surround and support the teeth — have caused loosening of the teeth, it may be necessary to extract the tooth or teeth.