Types
Supernumerary teeth can be classified by shape and by position. The shapes include the following:

Supplemental (where the tooth has a normal shape for the teeth in that series);
Tuberculate (also called barrel shaped);
Conical (also called peg shaped);
Compound odontoma (multiple small tooth-like forms);
Complex odontoma (a disorganized mass of dental tissue)When classified by position, a supernumerary tooth may be referred to as a mesiodens, a paramolar, or a distomolar. Occasionally, these teeth do not erupt into the oral cavity but manifest as a malocclusion.The most common supernumerary tooth is a mesiodens, which is a malformed, peg-like tooth that occurs between the maxillary central incisors. Fourth and fifth molars that form behind the third molars are another kind of supernumerary teeth. Treatment
Although these teeth are usually asymptomatic and pose no threat to the individual, they are often extracted for aesthetic reasons, to allow the eruption of other teeth, orthodontic reasons and/or suspected pathology. This is done particularly if the mesiodens is positioned in the maxillary central incisor region. The traditional method of removal is done by using bone chisels, although a more advanced technique has been found to be more beneficial, especially if surgery is required. Through the use of piezoelectricity, piezoelectric ultrasonic bone surgery may be more time-consuming than the traditional method but it seems to reduce the post-operative bleeding and associated complications quite significantly. Epidemiology
It is evident that hyperdontia is more common in the permanent dentition than in the primary.
In the United States, the DPT vaccine was administered as part of the childhood vaccines recommended by the Centers for Disease Control and Prevention (CDC) until 1996 when the acellular DTaP vaccine was licensed for use. History
In the 20th century, the advancements in vaccinations helped to reduce the incidence of childhood pertussis and had a dramatically positive effect on the health of populations in the United States. However, in the early 21st century, reported instances of the disease increased 20-fold due to a downturn in the number of immunizations received and resulted in numerous fatalities. During the 21st century, many parents declined to vaccinate their children against pertussis for fear of perceived side effects despite scientific evidence showing vaccines to be highly effective and safe. In 2009, the journal Pediatrics concluded the largest risk among unvaccinated children was not the contraction of side effects, but rather the disease that the vaccination aims to protect against.Diphtheria and tetanus toxoids and pertussis (DTP) vaccination was licensed in 1949. Since the introduction of the combination vaccine, there has been an extensive decline in the incidence of pertussis, or whooping cough, the disease which the vaccine protects against. Additionally, the rates of disease have continued to decline as more extensive immunization strategies have been implemented, including booster doses and increased emphasis on increasing health literacy. Vaccination Rates
In 2016, the CDC reported that 80.4% of children in the US have received 4 or more DTaP vaccinations by 2 years of life.