Dr. Vinita Tekchandani Masters Degree In Oral & Maxillofacial Pathology
Finding an extra tooth in the mouth can be surprising. These additional teeth, known as supernumerary teeth, can affect tooth alignment, chewing, and smile appearance. While some people never notice them, others may experience crowding, delayed tooth eruption, or discomfort. This guide explains the causes, types, symptoms, and treatment options for supernumerary teeth.
Supernumerary teeth are extra teeth that develop in addition to the normal set of teeth. They may cause crowding, delayed tooth eruption, or bite problems and often require evaluation by a dentist or oral surgeon.
In normal adult dentition, 32 teeth are composed of 8 incisors, 4 canines, 8 premolars, and 12 molars (including 4 wisdom teeth) and an extra tooth that is not in line with the typical dental formula is supernumerary teeth. These extra teeth may appear anywhere in the oral cavity and can be of different sizes, shapes, or locations.
Apart from the regular teeth, they may also appear in places that are not usually filled with teeth. Supernumerary teeth are more common in the front of the mouth (anterior region) than in the back (posterior region), and they are often classified based on their location and shape.
Hyperdontia is a dental condition that occurs because of supernumerary teeth. This condition will affect your normal teeth growth, trying to push the teeth out of their position and attempting to damage root tissues in other teeth. Hyperdontia is most likely to be detected during childhood and adolescence. In this stage, the eruption of the main teeth and root teeth increases the likelihood that additional teeth can be identified.
They’re extra teeth that look like regular teeth usually found at the end of a series of teeth.
These are small, cone-shaped extra teeth that will grow behind your front teeth
These are more complex extra teeth with multiple points and bumps, like mini molars or premolars
These are extra teeth that form in dental growths called odontomas, resulting in the formation of clusters of crooked teeth.
Yes, genetic factors and genetic abnormalities can sometimes cause supernumerary teeth. Although it is not entirely clear what causes the supernumerary teeth, there are indications that genetic mutations and variations may be involved in their development. Conditions like cleidocranial dysplasia and Gardner syndrome, which have a genetic basis, are examples of disorders where supernumerary teeth can be a characteristic feature. However, it is important to note that not all cases of supernumerary teeth are directly related to genetic disorders, as environmental factors may also contribute to their occurrence.
The removal of the additional teeth is the primary therapy for hyperdontia. In the case where the supernumerary teeth are partially or fully erupted, local or general anesthesia will be given to extract a supernumerary tooth, a dental instrument known as an elevator is used to wiggle the tooth, once it is done the tooth is carefully taken out with dental forceps. If the supernumerary tooth is impacted, oral surgery will be conducted to remove the tooth. In this method, an incision is made into the gum, then the impacted tooth will be broken into pieces and removed.
Hyperdontia will lead to certain complications to the teeth and their formations such as
Treatment depends on the location, number, and impact of the extra teeth.
A dentist may recommend treatment if the extra tooth causes:
If the tooth is not causing problems, regular observation may be enough.
Removal is often recommended when the extra tooth interferes with normal dental development.
For impacted supernumerary teeth, a minor oral surgical procedure may be required to remove the tooth safely.
| Feature | Normal Teeth | Supernumerary Teeth |
|---|---|---|
| Number | 32 permanent teeth | More than 32 teeth |
| Position | Expected locations | May appear anywhere |
| Shape | Standard tooth anatomy | Variable shapes and sizes |
| Effect on Alignment | Normal alignment | May cause crowding |
| Treatment Required | Usually none | May require monitoring or removal |
Supernumerary teeth are extra teeth that develop beyond the normal number of permanent teeth. While some remain harmless, others can affect tooth alignment, chewing function, and overall oral health. Early diagnosis and appropriate treatment can help prevent complications and support healthy dental development. If you suspect an extra tooth or notice delayed tooth eruption, a dental examination can provide clarity and the right treatment plan.
Yes, if they are not causing any problems. However, regular dental monitoring is important to ensure they do not affect surrounding teeth.
No. They are relatively uncommon and occur in a small percentage of the population.
Yes. Extra teeth can push neighbouring teeth out of position and contribute to crowding or bite issues.
Dentists usually diagnose them through clinical examinations and dental X-rays or 3D scans.
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