Teeth removal is not a solution simply for severely decayed or broken teeth. It can be used to correct or prevent poor alignment of teeth especially if your jawbone is not wide enough to accommodate your third molars.

Orthodontic treatment which aims to correct teeth alignment may include extracting teeth before braces are installed or when third molars partially emerge. The removal of extra and non-functional teeth becomes necessary before they compromise the results of prolonged orthodontic treatment.

Third molars tend to be impacted wisdom teeth as most mouths are too small for these additional teeth. Impacted wisdom teeth can cause dental problems including misalignment of teeth. Your dentist may recommend early removal starting from age 15 to prevent these problems.
In children, extracting teeth, usually milk teeth, which block permanent ones from erupting properly becomes necessary.

While the primary aim of dentists is to save the tooth, extracting teeth may become necessary not only for aesthetic reasons but also to prevent joint disorder, poor bite and uneven wearing of teeth. Nowadays, teeth extractions need not be feared as these are conducted safely and with minimum discomfort.