If an adult has one retained primary tooth, with the rest being secondary teeth, what type of dentition does that person have? What would have to happen for that person to get a permanent dentition? When identifying a specific tooth, list the dentition, arch, quadrant, and tooth name in that order e.
Therefore permanent mandibular right central incisor is the correct wording over right mandibular permanent central incisor. Each dental team should be familiar with the various systems of naming and coding teeth. Although each office may use only one system, the staff should be familiar with all systems so that communication among dental offices is possible.
Therefore the most popular systems are discussed here. The Universal system uses the Arabic numerals 1 through 32 for permanent teeth and the letters A through T for the primary teeth.
The number 1 is assigned to the most posterior molar on the upper right, the permanent maxillary right third molar. The highest number is given to the permanent mandibular right third molar Fig. Likewise, the letter A is given to the primary maxillary right second molar, and the letter T to the primary mandibular right second molar Fig. Horizontal and vertical lines divide arches into quadrants.
Universal System The Universal system uses the Arabic numerals 1 through 32 for permanent teeth and the letters A through T for the primary teeth. Only gold members can continue reading. Log In or Register to continue. The permanent teeth, outlined in black with yellow centers, are the permanent molars that develop posterior to the primary teeth.
They do not have deciduous predecessors, nor are they succeeded by successional teeth. Three types of teeth constitute the primary dentition: incisors, canines, and molars. Four types of teeth constitute the secondary dentition: incisors, canines, premolars, and molars. The primary teeth are organized in two arches: the maxillary upper arch and the mandibular lower arch. When divided on the mid-line sagittal plane, these teeth are organized into the right and left halves. Incisors and canines can be classified further as "anterior teeth" and molars and premolars as "posterior teeth.
Since primary teeth are shed, as some trees shed their leaves, they are also referred to as deciduous teeth, which are eventually replaced by the adult permanent dentition. Primary teeth are labeled in the following classification system and are designated in a clockwise direction:. Eruption appearance and exfoliation shedding of the primary dentition occur in the following order:. The central incisors of the upper teeth maxillary teeth erupt at 8 to 12 months and exfoliate at 6 to 7 years.
The central incisors of the lower teeth mandibular teeth erupt at 6 to 10 months and exfoliate at 6 to 7 years.
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