Typically, all baby teeth will be present by the age of three. As for all adult teeth, they erupt between the ages 6 to 14, with the exception of the third molar, also known as the wisdom teeth which normally erupt between 17 and 25 years of age. If the tooth has yet to erupt by an appropriate age, panoramic x-rays are taken. Dental features Microdontia may be present in one or more of the other teeth. This means that the teeth appear smaller than normal, may be observed in both the primary and permanent dentition. This condition can be genetically-linked and in severe cases, may present themselves in the form of ectodermal dysplasia, cleft lip or palate or Down Syndrome. A delay in tooth development may also serve as an indication, whereby the absence of an adult successor slows down the normal resorption of the roots of the baby teeth, which is the progressive loss of parts of the tooth. Misplaced (ectopic) positioning of the adult teeth may be discovered upon examination or a radiograph. One of the consequences may be an adult tooth intercepting with a baby tooth, causing premature loss or wrong positioning. This can be due to either the absence of neighboring teeth acting as a guide during eruption or the lack of space in the jaw for them to erupt into because of malocclusion. Skeletal features Several studies have discovered that anteriorly missing teeth can accompany retrognathic maxilla, also known as an underbite, prognathic mandible, where the lower jaw protrudes out more than normal, and smaller posterior cranial base length. Occurrence of<unk>  can be associated with reduced anterior lower facial height and lip protrusion. This can be linked to lower maxillary to mandibular plane angles. A more acute mandibular angle and flatter chin may develop as a result. These characteristics become more prominent as the condition becomes progressively severe, particularly when more than one tooth is missing. Other dental and radiographic features Data derived from principal component analysis of radiographic images show that children with mild<unk>  may display significant increase of the interincisal angle and decrease in the maxillary and mandibular incisor angles. Cephalometric tracing is commonly used to study a patient's dentofacial proportions in the craniofacial complex. This can aid in predicting growth changes, allowing dentists, especially orthodontists, to develop a suitable treatment plan. Coupled with that, findings consistent among individuals include: 1) anterior<unk>  associated with hyper divergent craniofacial pattern, 2) a tendency toward a class III malocclusion identified in maxillary<unk>  and 3) reduced lower posterior facial height in children with posterior and mandibular<unk> . Associated anomalies Illustration of cleft lip and palate # Reduction in coronal or radical dimensions # Retained primary teeth # Ectopic canine eruption # Abnormal morphology such as peg-shaped maxillary lateral incisors and taurodontism, characterized by an enlarged tooth body and roots that are reduced in size # Extracted teeth
Hypodontia
Hyperdontia
Anodontia
Maxillary hypoplasia
Micrognathism
Hemifacial microsomia
Iniencephaly
Elfin facies