In prognathism of the lower jaw, which statement about the SNB angle is true?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $9.99Unlock all

Prepare for the Orthodontics 5th Year SC Exam. Use flashcards, multiple choice questions, and detailed explanations for each question. Increase your confidence and readiness for the test with targeted study tools and resources!

Multiple Choice

In prognathism of the lower jaw, which statement about the SNB angle is true?

Explanation:
The SNB angle tells us how far forward the mandible sits relative to the cranial base. A larger SNB means the mandible is more prognathic. Normal SNB values are around 78–80 degrees, so when the mandible projects forward as in prognathism, the SNB increases beyond that normal range. Therefore, the correct statement is that SNB is more than normal. This increase helps distinguish a skeletal Class III pattern due to mandibular prognathism from other jaw relationships.

The SNB angle tells us how far forward the mandible sits relative to the cranial base. A larger SNB means the mandible is more prognathic. Normal SNB values are around 78–80 degrees, so when the mandible projects forward as in prognathism, the SNB increases beyond that normal range. Therefore, the correct statement is that SNB is more than normal. This increase helps distinguish a skeletal Class III pattern due to mandibular prognathism from other jaw relationships.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy