An anomaly characterized by an increased SNA angle is called which?

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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

An anomaly characterized by an increased SNA angle is called which?

Explanation:
The SNA angle measures how far the maxilla sits forward relative to the cranial base. An increased SNA means the maxilla is positioned more anteriorly than normal, which is called maxillary prognathism. Mandibular retrognathia relates to the mandible's position and SNB, not SNA; mandibular prognathism involves the mandible being forward (increased SNB); and bimaxillary retrognathia would show reduced values for both SNA and SNB. So the finding of a larger-than-normal SNA specifically identifies the maxilla as prognathic.

The SNA angle measures how far the maxilla sits forward relative to the cranial base. An increased SNA means the maxilla is positioned more anteriorly than normal, which is called maxillary prognathism.

Mandibular retrognathia relates to the mandible's position and SNB, not SNA; mandibular prognathism involves the mandible being forward (increased SNB); and bimaxillary retrognathia would show reduced values for both SNA and SNB. So the finding of a larger-than-normal SNA specifically identifies the maxilla as prognathic.

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