National Board Dental Hygiene Examination (NBDHE) Dental Hygienist Practice Test

What denotes a diastema between teeth #8 and #9 in dental notation?

1. One vertical red line

2. One "v" drawn

3. Two horizontal red lines

4. Two vertical red lines

The correct answer is: Two vertical red lines

In dental notation, a diastema refers to a space or gap between two teeth, commonly seen between the central incisors, which are numbered #8 and #9 in the Universal Numbering System. The convention for denoting a diastema visually involves using specific markings that clearly indicate the presence of this space. The correct way to indicate a diastema is by placing two vertical red lines between the teeth. This representation provides a clear and immediate visual cue that there is a gap present, ensuring that anyone interpreting the notation can easily understand that this particular anatomical characteristic is noted. The use of vertical lines is significant as it helps distinguish the marking from those used for other dental conditions or features, maintaining clarity and consistency in dental records. Understanding this notation is essential for effective communication within the dental team and for patient records, as it contributes to accurate diagnosis and treatment planning.