Intro to Dental Anatomy

Study Notes

Primary/Deciduous Dentition consists of 20 teeth, with no premolars and two molars in each quadrant, typically present from 0 to 6 years of age.
Permanent Dentition includes 32 teeth, emerging from age 6 to 21 years.

Maxillary Arch has 10 deciduous teeth with 6 anteriors and 4 posteriors, or 16 permanent teeth with 6 anteriors and 10 posteriors.
Mandibular Arch mirrors the maxillary structure with 10 deciduous teeth or 16 permanent teeth.

Each dental arch is divided into 4 quadrants at the midline, containing all teeth on one half of the jaw and including the last molar.

Upper Quadrant includes maxillary right and left sections with 5 deciduous teeth (3 anteriors, 2 posteriors) or 8 permanent teeth (3 anteriors, 5 posteriors).
Lower Quadrant includes mandibular right and left sections with similar tooth distributions.

Median line, also known as midline or midsagittal plane, serves as the division for the dental structure.
Each arch comprises 4 quadrants, with corresponding mirror images across the arches.

Mixed Dentition Period occurs from ages 6 to 12, during which both primary and secondary teeth coexist, beginning with the eruption of the first permanent tooth.
Permanent Dentition Period follows, where only permanent teeth are present, usually after the last primary tooth is lost around age 12.

Deciduous teeth, or baby teeth, amount to 20, with 10 in each arch and 5 in each quadrant.
Nonsuccedaneous teeth do not replace any primary teeth.
Permanent teeth, or adult teeth, total 32, comprising 16 in each arch.

Succedaneous teeth are permanent teeth that replace primary teeth. Permanent molars are nonsuccedaneous as they do not replace any teeth, while premolars replace primary molars.

Universal System starts at the patient's upper right quadrant, designating primary teeth with letters A-T and permanent teeth with numbers 1-32.
Palmer Notation System utilizes symbols for quadrants; numbers/letters are placed above (maxillary) or below (mandibular) lines for tooth identification.
FDI System employs a two-digit numbering scheme for teeth; the first digit indicates the quadrant and the second specifies the tooth position, numbered from the midline.