If all efforts to save a tooth have failed the tooth has to be extracted. Teeth cracked deep under the gum line, teeth with a big degree of mobility due to severe gum disease (Periodontitis), back molars which despite several treatments developed abscesses, extremely decayed teeth, or teeth with large perforated roots during root canal treatment have to be extracted.
Wisdom teeth will be extracted only if they need to, it is not usual to extract wisdom teeth unless orthodontic treatment requires to do so or they repetitively become infected because of their awkward position which makes them very difficult to reach and clean. Wisdom teeth covered partially by gum are most likely to develop an infection. To keep them a consistent compliance from the patient is required. If patients neglect cleaning partially impacted wisdom teeth they can develop an infection around the crown (pericoronitis) which without professional cleaning will quickly spread into the surrounding tissue creating big discomfort consisting of pain, difficulties to open the mouth and chewing discomfort. Those teeth can also develop an abscess which if untreated will spread by blood and lymph into the brain or go down into the chest and develop into life threatening infections.