Wisdom teeth (Third molars)
In the late teenage years, third molars erupt and the lower front teeth gradually increase in irregularity.
In the past, it was thought that pressure exerted by the third molars caused the increase in irregularity. However recent studies suggest the two events are unrelated.
In fact, it is normal for your front teeth to become more irregular as you grow older - whether you have third molars or not!
Now days, third molars are not removed as a matter of routine.
Your orthodontist can advise you about the status of your third molars. Usually an x-ray is required for a full evaluation of your particular case.