Which measurement indicates the inclination of the maxillary incisors with a range of 110-114?

Prepare for the American Board of Pediatric Dentistry Oral Boards. Utilize flashcards and multiple-choice questions with hints and explanations to ace your exam!

Multiple Choice

Which measurement indicates the inclination of the maxillary incisors with a range of 110-114?

The measurement that indicates how the upper incisors are inclined is the maxillary incisor angle. This value is obtained on a lateral cephalometric radiograph by measuring the angle between the long axis of the maxillary incisor and a cranial base reference line (often the SN line). A normal range of about 110–114 degrees reflects typical incisor inclination relative to the cranial base. This specific angle directly reflects the forward tilting (proclination) or tipping of the upper incisors. The other options describe different aspects: the subnasal angle relates to nasal and upper lip area aesthetics, the mandibular plane angle assesses vertical skeletal pattern, and SNB indicates the position of the mandible relative to the cranial base. None of these measure upper incisor inclination.

The measurement that indicates how the upper incisors are inclined is the maxillary incisor angle. This value is obtained on a lateral cephalometric radiograph by measuring the angle between the long axis of the maxillary incisor and a cranial base reference line (often the SN line). A normal range of about 110–114 degrees reflects typical incisor inclination relative to the cranial base. This specific angle directly reflects the forward tilting (proclination) or tipping of the upper incisors.

The other options describe different aspects: the subnasal angle relates to nasal and upper lip area aesthetics, the mandibular plane angle assesses vertical skeletal pattern, and SNB indicates the position of the mandible relative to the cranial base. None of these measure upper incisor inclination.

More practice questions