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There are 32 permanent teeth and those of the maxillae (on the top) erupt in a different order from permanent mandibular (on the bottom) teeth. Maxillary teeth typically erupt in the following order: (1) first molar (2) central incisor, (3) lateral incisor, (4) first premolar, (5) second premolar, (6) canine, (7) second molar, and (8) third molar.
[vague] [6] Talon cusp tends to occur on permanent teeth only, [5] being very rare in deciduous teeth. [5] In most cases, the involved teeth are the permanent maxillary lateral incisors (55%), followed by maxillary central incisors (33%), mandibular incisors (6%), and maxillary canines (4%).
Talon cusps range from less than 1% to 6% of the population, and 33% of cases occur on the permanent maxillary central incisor. [19] Deciduous teeth are unlikely to have talon cusps. Also, the permanent maxillary incisors are the most likely teeth to have a dilaceration, which is a sharp curve on a tooth. [20]
The mandibular anterior teeth must be stabilized to prevent excessive lingual tipping. A fixed mandibular arch from the left first permanent molar to the right first permanent molar may be required. Judicious reproximation disking of primary teeth with no tooth extraction is an occasional option.
Such tooth avulsion was the intentional removal of one or more teeth, which was done for ritual or aesthetic reasons. It was also used to denote group affiliation. Typically, the maxillary incisors were the teeth most often selected for removal. This practice is still common in parts of Africa. [48]
During the developmental stages, the permanent tooth germ, specifically of the maxillary incisor lies superior to the apex of the primary incisor. [5] If there is damage to the primary incisor, this will cause an impact on the permanent incisor as well as there is only about a 3mm space of thickness between the primary and permanent teeth. [5]
The overall length of the deciduous maxillary central incisor is 16 mm on average, with the crown being 6 mm and the root being 10 mm. [17] In comparison to the permanent maxillary central incisor, the ratio of the root length to the crown length is greater in the deciduous tooth. The diameter of the crown mesiodistally is greater than the ...
As growth of the alveolar bone continues and the adjacent permanent teeth erupt, the ankylosed deciduous tooth appears to submerge into the bone, although in reality it has not changed position. Treatment is by extraction of the involved tooth, to prevent malocclusion, periodontal disturbance or dental caries. [3]