1. Lack of space – When the jaws are too small for the size of the teeth, when one permanent tooth erupts it causes the loss of two primary teeth. Crowded teeth tend to erupt on top of each other of behind the primary teeth giving rise to “shark teeth”.

2. Obstructions in the path of the emerging tooth – Some times “extra” teeth or supernumerary teeth develop on top of the regular ones.  These teeth are common in the area where the upper central incisors should erupt and create a barrier.

3. Abnormal tooth position or angulation – As a result of trauma to the teeth or wrongly shaped teeth the position of the teeth and their eruption path changes. This can lead the teeth to erupt into other  teeth or get stuck after loosing their way.

In addition to these common reasons, there genetic and systemic reasons. Children with ectodermal dysplasia, cleidocranial dysplasia or Down syndrome may have missing teeth. Children which had suffered from lack of nutrition, chronic illnesses, hypothyroidism, hypopituitarism, or rickets can have missing teeth or display delayed eruption.

If a tooth is missing or a permanent tooth had not erupted after 6 months of the primary tooth being shed, it is not normal. It requires an examination to determine what is the reason the permanent tooth is not erupting, please ask Dr. Kaufman or schedule an appointment for a consultation.