What causes anodontia?

Anodontia is caused by genetics. It's different from missing teeth due to gum disease, a mouth injury, cavities, or tooth decay. Instead, anodontia is inherited (passed down from parent to child) in what's called an autosomal recessive pattern.

What is anodontia?

Anodontia is a genetic disorder defined as the absence of all teeth. It usually occurs as part of a syndrome that includes other abnormalities. Also rare but more common than anodontia are hypodontia and oligodontia. Hypodontia is genetic in origin and usually involves the absence of from 1 to 5 teeth.

What is the etiology of anodontia?

What causes it? Anodontia is an inherited genetic defect. The exact genes involved are unknown. However, Anodontia is usually associated with ectodermal dysplasia.

Which teeth are very common to be diagnosed as anodontia?

Congenital absence of all wisdom teeth, or third molars, is relatively common. Anodontia is the congenital absence of teeth and can occur in some or all teeth; whereas partial anodontia (or hypodontia), involves two dentitions or only teeth of the permanent dentition (Dorland's 1998).

What is the difference between hypodontia and anodontia?

Hypodontia refers to dentitions with fewer teeth than normal due to agenesis of the dental germ or failure of the dental germ to fully develop (Fig. 4.9). Anodontia refers to a congenital absence of all teeth and oligodontia to the absence of most of the teeth (Schuurs, 2013).

developmental disturbances of teeth (part 3) - anodontia

What is false anodontia?

Definition. Absence of teeth as a result of impaction, delayed eruption, exfoliation or extraction. [

What is pseudo anodontia?

Pseudoanodontia is a descriptive term that indicates clinical but not radiographic absence of teeth that should normally be present in the oral cavity for the patient's dental and chronologic age.

Is oligodontia hereditary?

Oligodontia is a dental abnormality in which the patient is missing teeth. It is a hereditary disorder characterized by agenesis of more than 6 pri- mary/permanent teeth, excluding the wisdom teeth.

Is missing teeth a disability?

Therefore, an individual should be considered to have a dental disability if orofacial pain, infection, or pathological condition and/or lack of functional dentition affect nutritional intake, growth and development, or participation in life activities.

Are peg laterals hereditary?

Peg-shaped teeth are a hereditary dental disorder called microdontia, a condition where one or more teeth appear smaller than average (microdontia) [1]. In general, the most common teeth affected are the upper lateral incisors or sometimes third molars.

What causes congenital missing teeth?

Missing teeth are the results of increased maternal age, low birth weight, multiple births and early exposure to certain infections, trauma, or drugs. Hypodontia or CMT (Congenitally Missing Teeth) usually is the result of genetic disorders such as ectodermal dysplasia or Down syndrome.

How common is missing teeth?

It's so common that up to 20% of all adults are missing at least one tooth! The most common congenitally missing teeth are: The wisdom teeth – these often pesky teeth are the ones all the way in the back of the mouth.

Is missing lateral incisors hereditary?

Congenitally missing teeth are teeth that never appear and are not trapped in the gums – they just do not exist in some people! The condition, which usually affects the lateral incisors and the second premolars, is often a harmless genetic trait passed down from parents to their children.

Which teeth are more commonly involved in partial anodontia?

The biggest prevalence of partial anodontia are the third molars either the four or only one of them, in all ethnic groups, with variations between 25 and 35% in frequency.

What causes severe hypodontia?

Hypodontia is usually the result of a problem with the band of tissue under the gums (dental lamina) where the teeth form. The most common cause of these problems is heredity or family history. A mutation of one of the specific genes which help form the dental lamina properly can lead to hypodontia.

When should I worry that my baby has no teeth?

A slight delay is fine, but it may be time to see your dentist if your child has no teeth at 18 months. Delayed tooth eruption usually isn't a major cause for concern, but it never hurts to check.

Is hypodontia genetic?

Hypodontia can either occur with accompanying genetic disease as part of a recognised clinical syndrome, or as a non-syndromic, familial form, which occurs as an isolated trait, affects variable numbers of teeth and appears either sporadically or in a familial fashion within a family pedigree⁷ (Fig. 1).

Is oligodontia a disability?

Conclusions: Oligodontia is a heterogeneous condition. Patients with oligodontia can be classified as having three different types according to the extent of their disability and the complexity of their prosthodontic requirements.

What syndromes are associated with oligodontia?

Oligodontia can occur in association with various genetic syndromes, like ectodermal dysplasia, Van Der Woude syndrome, Down syndrome and Reiger syndrome or as a nonsyndromic isolated familial trait, or as an infrequent finding.

How is oligodontia treated?

Treatment of oligodontia requires a multidisciplinary approach. Prosthetic treatment includes removable partial dentures, fixed partial dentures and over dentures. Osseointegrated dental implants are also possible when there is adequate bone height as they offer a more stable, long-term solution.

What is the most common type of supernumerary tooth?

The conical which is a small peg-shaped tooth is the most common supernumerary found in the permanent dentition and it usually presents between the maxillary central incisors as a mesiodens.

Is supernumerary teeth genetic?

Presence of supernumerary teeth is well-recognized clinical phenomenon. However, it is uncommon to find multiple supernumeraries in individuals with no other associated disease or syndrome. Presence of multiple supernumerary teeth is thought to have genetic component.

What do you do for hyperdontia?

The primary treatment for hyperdontia is extraction. Prior to extraction, X-rays are often taken to assess supernumerary teeth and determine if they are impacted or erupted. If supernumerary teeth are partially or fully erupted, they may easily be extracted.

What is Dentinogenesis imperfecta?

Dentinogenesis imperfecta is a disorder of tooth development. This condition causes the teeth to be discolored (most often a blue-gray or yellow-brown color) and translucent.

Are missing lateral incisors common?

According to epidemiological studies, one or both of the maxillary lateral incisors are congenitally missing in approximately 2% of the population. (1) Maxillary laterals are the third most common missing teeth behind third molars and mandibular second premolars.