National Dental Assisting Examining Board (NDAEB) Practice Exam

Which numbering system uses numbers 1-31?

1. Universal

2. American Dental Association

3. Specialist Coding System

4. British Dental System

The correct answer is: Universal

The Universal numbering system employs numbers 1 through 32 to identify each tooth in the adult dentition. In this system, teeth are numbered starting from the upper right third molar (tooth 1) and proceeding through each quadrant until reaching the lower right third molar (tooth 32). This systematic approach allows for a straightforward, standardized way of referencing teeth across various dental practices. The correct answer is the Universal numbering system because it is widely recognized and commonly used in North America, making it easier for dental professionals to communicate about patient care and procedures. In contrast, the other options describe different numbering systems that do not utilize a simple consecutive numbering method from 1 to 31. The American Dental Association uses a combination of letters and numbers to categorize teeth, the Specialist Coding System might include additional identifiers or codes for specific procedures, and the British Dental System employs a numbering method that includes a combination of numbers and letters reflecting zones or quadrants of the mouth. Each of these systems serves a unique purpose in dental practice but does not mirror the straightforward numbering of the Universal system.