Dental Assistant Practice Exam

How are deciduous teeth labeled when charting?

1. A-T

2. 1-20

3. AA-TT

4. A-F

The correct answer is: A-T

Deciduous teeth, commonly referred to as primary or baby teeth, are labeled using the letters A through T in the Universal Numbering System. This system designates the first primary tooth in the upper right quadrant as tooth A, continuing across the upper arch to tooth J on the upper left. The numbering then progresses down to the lower left quadrant, starting with tooth K and ending with tooth T in the lower right quadrant. Choosing this labeling method is practical because it creates a standardized way that dental professionals can use to communicate about a child’s dental health. This is particularly important in pediatric dentistry, where clarity in records is crucial for both current and future treatments. The other labeling methods mentioned don’t accurately reflect the systematic approach used for deciduous teeth. Using numbers such as 1-20 is generally reserved for permanent teeth. The combination of letters like AA-TT and A-F does not correspond to any established system for charting primary teeth. This highlights the importance of the A-T labeling method in ensuring effective communication and documentation within dental practices.