A decrease in the Tweed angle indicates which anomaly?

A decrease in the Tweed angle indicates which anomaly?

• A. deep occlusion
• B. open occlusion
• C. inferior retroalveoli
• D. mandibular retrognation

Answer: (A)

The Tweed angle represents how inclined the lower incisors are to the mandibular plane: a smaller value means the lower incisors are more retroclined relative to that plane. When the lower incisors tilt back, the front teeth tend to overlap the uppers more vertically, increasing the overbite and producing a deeper bite. So a decrease in this angle points toward deep occlusion rather than an open bite, a retroalveolar bone issue, or mandibular retrusion, which would show up with different measurements or findings.

The Tweed angle represents how inclined the lower incisors are to the mandibular plane: a smaller value means the lower incisors are more retroclined relative to that plane. When the lower incisors tilt back, the front teeth tend to overlap the uppers more vertically, increasing the overbite and producing a deeper bite. So a decrease in this angle points toward deep occlusion rather than an open bite, a retroalveolar bone issue, or mandibular retrusion, which would show up with different measurements or findings.