Category Archives: Supernumerary Teeth Facts

White Spots on Teeth

Sometimes the patients complain of white spots on their front teeth. Such condition may be hereditary but most of the times are due to some other factors that we will discuss in this article.

The white spots on the teeth are mainly a cosmetic issue but should be taken under serious consideration because it may be an early sign of initial tooth decay. The white spots are usually a result of enamel demineralization. This is how the caries begins – the acids from the bacteria that reside in the mouth and the acids from the food cause this loss of minerals. If the ph stays lower than 5.5 there is no balance between the demineralization and remineralization and loss of minerals is at place. This process can be seen on the tooth as opaque areas.  These opaque areas have a white color and people complain of “white spots on their teeth”.

Having such hypocalcified spots does not mean that the patient’s hygiene is bad, sometimes can be caused by other factors like wearing braces for a long time. In these cases the hygiene is hard to be improved due to this plaque retention factor.  The mineral loss can be caused by consuming too much acidic foods (citric fruits, drinking juices with low ph). People do not realize how acidic some foods may be. Let’s take for example Coca Cola. While drinking it you feel the sweet taste but that does not mean that it does not contain acidic components. As a matter of fact such juices and drinks are the most dangerous for the enamel, you feel they are sweet but they contain a huge amount of acids and sugar at the same time. Keep in mind that the cariogenic bacteria in the mouth use simple sugars for living and their final metabolic product are acids. In this way acids are delivered by the juice itself and from the bacterial terminal products of metabolism. These demineralized areas can be restored if the ph is raised over 6.5 ph.

The white spots can also be a result of hereditary conditions such as enamel and dentine hypoplasia. The mineralization of the tooth tissue is lower than usual but that is not a consequence of acidic foods or poor hygiene but other factors we will discuss later on.

Baby Born with Teeth

Sometimes babies have teeth that are present in their mouth at the time of their birth. They are called natal teeth and their presence is very uncommon. According to National Institute of Health studies they appear in one of 2000-3000 babies. Usually this is the set of the lower central incisors. The babies born with teeth have to be monitored because this condition could cause some problems.

What to do with the natal teeth?

The doctors should decide what to do with the natal teeth. They can be extracted before the mother has started nursing. The natal tooth can hurt the mother’s breasts and also cause choking if the tooth is loose and at some point it falls in the baby’s throat. Don’t worry if your child has lost his natal tooth because he will still have his decidous and adult teeth and won’t affect their development and eruption. If the babies are born with a loose tooth it is better to be extracted.

Another decision the dentist can take is to keep the natal tooth. If it doesn’t have pointy and sharp edges and doesn’t bother the breastfeeding the tooth can be kept. Keep in mind that it is a retention factor and should be cleaned often. That can happen by rinsing or rubbing the gums with cloth soaked in hydrogen hydroxide. If the tooth is sharp it can be polished with a bur and other polishing brushes and disks. The baby can hurt the mother’s breast and even himself when sucking his own teeth.

Baby Teeth Chart

It is very important for the clinician to be aware of the teeth eruption dates. Not only for the primary but also for the permanent teeth. In this way the diagnosis of the supernumerary tooth will be easier to place. The eruption dates can vary and depend on hereditary factors but there are certain periods in which the tooth eruption is considered as premature or delayed eruption. The baby teeth chart will help you orientate about the normal eruption dates. The presence of these conditions should alert the dentist to a potential problem.

Assessment of the oral soft tissues and dental check-up must be executed. After the assessment the dentist should write down all the information received during the intra-oral examination. The following factors should be included in the dental charting

Black Gums

Sometimes the patients complain about a weird change in the color of their gums. They come to us complaining about their bad outlook and want to solve this problem as soon as possible. This situation may happen very often in the regular dental practice since most of the patients are concerned only about the esthetic point of view. On the other hand the clinicians have a different way of evaluating these conditions and are mostly concerned about the function and anatomical health of the surrounding tissues. As a matter of fact both points of view meet in the right clinical decision when it comes to gum diseases.

The best way to evaluate the importance of the clinical case is by obtaining the medical history information- what the complaints are, the history of the complaint, past dental issues, social and family dental and medical history. The patients have noticed a significant change in the gingiva margin which is close to the tooth crown. They say “Doctor, my gums turned black and look awful. Is there an explanation for this color change and what can I do to restore their previous color?” When we observe a healthy gingiva its normal color is pink. Actually this pink color comes from the small arteries and capillaries in the gums.

Dens invaginatus a.k.a Dens in dente

Dens invaginatus is also known as dens in dente. This condition appears when the enamel epithelium invaginates into the dental papilla. This leads to the invagination in the tooth crown. Sometimes this invagination can extend in the root of the tooth. On the x-rays this abnormality can be seen as a enamel line in the crown or the root of the tooth. Other names for dens in dente are gestant composite odontome and dilated composite odontome (they are rarely used).

The most commonly affected tooth is the maxillary lateral incisor. Clinically the dentist can spot a lateral incisor with a deep cingulum pit on the palatal side of the tooth. In the extreme version of dens in dente the tooth root and crown may have abnormal shape. For example it can be spotted as a tuberculate tooth with invaginations on the cusp of the tooth. The pulp is displaced and the enamel line is very thin surrounding the pulp. In some cases the enamel line is even missing. This invagination can change the shape of the root. It is easy to differentiate dense in dente if you have taken x-rays of the abnormal tooth.

Dens in dente frequency

Dense in dente is more common in males than in females. This ratio varies in different groups but we can summarize it to 2:1. Dens invaginatus differs in racial groups – the Chinese ethnicity is more commonly affected.

The presence of one invaginated tooth is a reason for the dentist to take a look at the other surrounding teeth with the idea of having additional abnormalities. Dens in dente can cause dental caries due to its abnormal shape (which is the reason for more plaque retention) and poor mineralization.

Dens in dente can be spotted in a single tooth but very often there is an abnormality in the contralateral and adjacent teeth. An experienced dentist should take this fact under consideration. At the x-rays he can spot a incomplete root formation and periapical artefacts. When a dens in dente is diagnosed it is very common for the patient to have supernumerary teeth as well. Some of the supernumerary teeth have abnormal shape (conical, tuberculate e.t.c.) but that doesn’t mean that they are invaginated teeth.

Treatment of dens in dente

If a dens invaginatus is diagnosed at an early stage it can be covered with sealant in order to protect the deep fissures. They are a retention factor for plaque and cariogenic bacteria. Antibiotic therapy has to be prescribed if a cellulitis is at present. Other inflammatory conditions call for drainage and incision (i.e abscess). If there is a periapical changes an endodontic treatment should be executed. If the tooth apex is not formed yet the endodontic treatment should be executed after the apex fixation (using calcium hydroxide root filling materials).

Dens in dente. Dens invaginatus


Extra teeth also known as supernumerary teeth occur in 0.2 – 0.8% of Caucasians in the primary dentition and 1.5 – 3% in the permanent teeth. The presence of supernumerary is twice more often in males than in females. Usually this condition is hereditary. If the parents have extra teeth there is a 30-50% chance for the child to have supernumerary as well.
In most of the cases the supernumerary tooth is located in the anterior maxilla, in the midline or adjacent to the midline. This condition is known as mesiodens. Basically the mesiodens is a supernumerary tooth but because of its specific location it has a different name. When such is found in the midline in the anterior mandibular section it is not called mesiodens. The mesiodens has a specific location and typical shape, often reduced and described as conical or tuberculate.
When the extra teeth are located in the posterior regions they are known as paramolars and distomolars. The paramolars are when then supernumerary is adjacent to the normal tooth in the dentition and the distomolars are the extra teeth that have a distal position compared to the normal sequence of the teeth.

What is the male:female ratio in supernumerary teeth and mesiodens?

Supernumerary teeth found in the maxilla : Supernumerary teeth found in the mandible = 5:1

Tooth Mesiodens

They may be present symmetrically or bilaterally. One of the problems then can cause is the delayed eruption of the permanent tooth that are developing under it in the jaw. That condition is normally presented in the case of mesiodens.

Diseases in which mesiodens and supernumerary teeth occur.

Supernumerary teeth are presented in a number of syndromes and disorders – Cleidocranial dysplasia (Cleidocranial dysostosis), Oral-facial-digital syndrome Type 1 and Gardner syndrome.
The presence of malocclusion should be taken for consideration. The orthodontic problems can be a consequence of a supernumerary teeth that delay the eruption of the permanent teeth and cause tooth crowding. A single panoramic radiograph of the dentition gives us the information about the presence or sometimes the absence of teeth (hypodontia).
Before the treatment of supernumerary teeth there are some procedures that we have to remember. When we plan the orthodontic treatment we need a good quality study models, radiographs (a single panoramic radiograph is enough), and full face and profile photographs. The pictures are very important for the dentist because after the treatment the patient cannot remember his initial outlook. With the full face and profile photographs the dentist should make a before-after picture that objectively shows the change not only in the teeth but in the soft tissues profile and the lips morphology.



Impacted teeth and Extra teeth in the Orthodontic Treatment

Sometimes some of the permanent teeth remain impacted in the bone, resulting in a delay of their eruption. This is often a cause for orthodontic problems. The delayed eruption can be a result of many factors (local and general) – endocrine problems like hypothyroidism, extra teeth, odontoma, crowding of teeth, sclerosis of the soft tissues that cover the teeth and many more. In order to facilitate eruption the dentist should use orthodontic and surgical techniques. That may include creating a flap and removing the bone over the tooth in order to expose the impacted or supernumerary tooth. In this way it will be easy for the dentist to execute the dental procedure.

If there are extra teeth, deciduous teeth or odontoma they need to be removed. When a big part of the crown is exposed orthodontic brackets can be bonded to the crown, and thetooth can be gradually aligned in its correct position in the dental arch. When the teeth are not erupted and are covered by soft tissue scalpel or electrosurgical blade is used for exposing the crown. This “window” helps it to erupt naturally. If that does not happen soon orthodontic treatment is needed.


Impacted Teeth


Sometimes people believe they have supernumerary teeth but the problem actually consists of late eruption of the permanent teeth. In order to help the permanent teeth to erupt a palatal flap is created and a round bur is used to remove the bone covering the impacted teeth. Brackets are placed – they will help the traction of the teeth in their right position in the dental arch.

The presence of ectopic impacted teeth is not often observed. They can be at several places – near the mandibular angle, under the permanent teeth, in the mandibular ramus, in the coronoid process, in the maxillary tuberosity, in the walls of the maxillary sinus, nasal cavity and orbit. The treatment of these teeth is often complicated, especially when it comes to extraction and orthodontic treatment of supernumerary wisdom teeth. They are usually spotted on the x-rays but sometimes can cause a slight protuberance on the vestibular, lingual or palatal surface.

Impacted Teeth Treatment

Impacted Teeth Symptoms