In order to reduce writing and dictating the full name of teeth, doctors often use code names to indicate the position of teeth. At present, the commonly used methods are: position recording, digital marking and general recording.

The position recording method uses 1 ~ 8 to represent the central incisor to the third molar in turn; I ~ V represent the middle deciduous incisor to the second deciduous molar respectively. The upper and lower dental arches are divided into four areas with "+"symbol, and the horizontal line in "+"indicates the occlusal surface to distinguish the upper and lower teeth; The vertical line indicates the center line that distinguishes the left from the right. "┘" represents the upper right area of the patient, which is called area A; "└" represents the upper left area of the patient, which is called area B; "┐" represents the lower right area of the patient, which is called area C; "┌" represents the lower left area of the patient, which is called D area; Therefore, dental arch can be divided into four areas: AC BD.

Digital marking method is a two-digit marking method proposed by the International Dental Federation in 1970, which is used to simplify the oral health questionnaire designed by WHO. Each tooth is represented by two Arabic numerals, the first numeral represents the quadrant where the tooth is located, and the four quadrants of the oral cavity are clockwise: upper right, upper left, lower left and lower right, 1, 2, 3 and 4 for permanent teeth and 5, 6, 7 and 8 for deciduous teeth; The second digit indicates the tooth position, and the numbers from the central incisor to the third molar are 1, 2, 3, 4, 5, 6, 7, 8. As shown in fig. 24, the left maxillary second bicuspid tooth, permanent tooth; 85 denotes the right mandibular second deciduous molar. It should be noted that the upper right central incisor should be pronounced as "1" and "1" instead of "1 1".

The general recording method is also a method of recording the position of teeth with numbers. From the right maxilla to the left maxilla, to the left mandible and then to the right mandible, in the order of teeth. From the right maxillary third molar to the central incisor is * 1, *2, *3, *4, *5, *6, *7, *8, from the left maxillary central incisor to the third molar is *9, * 10, * 165438. From the left mandibular third molar to the central incisor, the order of teeth arrangement is * 17, * 18, * 19, *20, *2 1, *22, * 23 * 24, from the right mandibular central incisor to the third molar. The numbering method of deciduous teeth is the same, except that "D" is added after the numbering, such as "* 1d" for the upper right second deciduous molar and "* 16d" for the lower right central incisor.