National Dental Assisting Examining Board (NDAEB) Practice Exam

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Prepare for the National Dental Assisting Exam with comprehensive quiz questions, including multiple choice and detailed explanations. Equip yourself for success!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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Which number corresponds to the mandibular left second premolar in the Universal Numbering System?

The correct answer is: 20

In the Universal Numbering System, the mandibular left second premolar is designated as number 20. This numbering system starts with the maxillary right third molar, assigned the number 1, and continues sequentially through the maxillary arch to the maxillary left third molar, which is number 16. The numbering then continues with the mandibular left third molar as 17 and proceeds through the mandibular arch to the mandibular right third molar, which is number 32. The second premolar is positioned towards the back of the mouth, following the first premolar. Therefore, after the first premolar (which is number 21), the second premolar on the mandibular left side is correctly identified as number 20. This distinction is crucial for dental professionals to communicate effectively about specific teeth during procedures and examinations.