National Dental Assisting Examining Board (NDAEB) Practice Exam

What term describes the horizontal distance between the anterior maxillary teeth and the mandibular teeth when occluded?

1. Overbite

2. Overjet

3. Mesiodistal Angulation

4. Incisal Edge Relation

The correct answer is: Overjet

The term that describes the horizontal distance between the anterior maxillary teeth and the mandibular teeth when occluded is overjet. This measurement is crucial in dentistry as it helps in assessing the relationship between the upper and lower teeth in the anterior region. Overjet is typically measured in millimeters and is significant in determining proper dental alignment and function. When evaluating occlusion, overjet provides insight into potential issues such as bite misalignment, which can affect a patient’s chewing function and may contribute to jaw discomfort or dental wear. A healthy overjet measurement indicates a proper alignment of teeth, while excessive or inadequate overjet could signal developmental concerns or orthodontic issues that may need to be addressed. In contrast, the other terms refer to different aspects of dental occlusion. For example, overbite pertains to the vertical overlap of the upper teeth over the lower teeth, mesiodistal angulation relates to the angulation of the teeth along the mesial and distal planes, and incisal edge relation speaks to the relationship of the incisal edges of opposing teeth during occlusion. Each of these plays a role in overall dental health, but they do not specifically describe the horizontal distance that overjet does.