This is how teeth look like. The portion of teeth that we see in the mouth is just part of the whole teeth. The roots of teeth which are usually longer are within our bone and gums. Extraction is to remove the whole tooth itself, without leaving any roots.
Reasons for tooth extraction
When tooth cannot be saved from infection.
If tooth decay or damage extends to the pulp, bacteria can enter into the pulp, leading to infection. Can be corrected by root canal treatment but if can’t cure it, extraction may be needed.
A crowded teeth
Sometimes dentist pull teeth to prepare the mouth for braces
Periodontal (gum) disease
Severe gum disease will cause loosening of teeth, which might cause pain, leading to extraction
Disadvantages of tooth extraction
The long term cost of replacing the tooth if you choose to do so. Tooth replacement is usually needed with dentures, implant or bridge, which will be more costly long term. Surrounding teeth may shift or move into the space where the tooth is missing. This can cause issues with your bite and oral hygiene. Missing teeth can affect speech, confidence and your ability to bite and chew.