Striking by an Extra Tooth
If the dreamer sees that an extra tooth is striking them or their other teeth, it may indicate that they or their family will be harmed by a person represented by this tooth. If they see themselves benefiting from this extra tooth without their family, it may suggest that they will gain a benefit that is exclusive to them, without the rest of their family.
Per Ibn Sirin's Muntakhab al-Kalam fi Tafsir al-Ahlam