An Adult Tooth Is Coming In Behind a Baby Tooth
A second row of lower front teeth can appear during tooth changes. Learn what to report, why an examination helps and why pulling is not the answer.
Your child opens wide and there is a new tooth behind a baby incisor that has not fallen out. People sometimes call this 'shark teeth.' A permanent lower front tooth can emerge on the tongue side of the baby tooth. The nickname describes the appearance; it does not tell you whether anything needs to be done.[1]
Notice what is actually happening
Tell the dentist which tooth you noticed, when it appeared and whether the baby tooth is loose or firm. Mention pain, swelling or a problem eating. A loosening baby tooth and a firmly retained one may need different plans. The position of the permanent tooth and the available space also matter.[1][2]
You can say, 'The new lower front tooth is behind the old one, and the old one does not seem loose.' That is enough to ask how soon it should be examined. Avoid turning the evening into repeated tests of how far the tooth can be pushed; the child does not need to demonstrate it for every relative.
Do not pull a firm tooth at home
Do not force the baby tooth out or push the permanent tooth towards the gap. Let the dentist determine whether observation or treatment is appropriate. Keep tools and string out of the plan.[1]
Sometimes the baby tooth sheds and the new tooth's position improves. That possibility is not a guarantee of final alignment. If the dentist recommends monitoring, ask what change they expect and when they want to review it. If removal is recommended, ask what makes it useful in this child's case.[1]
Keep the follow-up specific
Write down the review date and what should prompt an earlier call. Continue helping with cleaning around both teeth, asking for a demonstration if the overlap makes it awkward. You do not need to decide tonight whether braces will eventually be needed. The immediate question is what this tooth and its neighbour need now.
