Triadan Numbering System Flashcards
The Triadan Numbering system uses 3 numbers. What is the purpose of each number?
1st identifies the quadrant of the mouth
2nd & 3rd identify the tooth
How are the quadrants identified?
1xx = right maxillary 2xx = left maxillary 3xx = left mandibular 4xx = right mandibular
Where does numbering of the teeth begin?
Front of the mouth
What rule is used for species that have fewer teeth?
Rule of 4 and 9
What does the rule of 4 and 9 state?
the canine tooth is always 04 and the first molar is always 09
How are deciduous teeth identified?
5 = right maxillary (upper) 6 = left maxillary (upper) 7 = left mandibular (lower) 8 = right mandibular (lower)
What is the primary advantage of the Triadan numbering system?
It can be used with nonalphanumeric computers
What is another advantage of the Triadan Numbering System?
The numbering system is convenient
What are disadvantages of the Triadan Numbering System?
Not intuitive
The technician must know the code to understand which tooth is being identified
