The condition is thought to be caused by a combination of side effects of the drug (clenching and grinding of teeth, dry mouth) and lifestyle factors (infrequent oral hygiene, frequent consumption of sugary drinks), which may be present in long term users.
An Interior Angle is an angle inside a shape. Note: When we add up the Interior Angle and Exterior Angle we get a straight line, 180Â°. (See Supplementary Angles).
1. an angle formed outside parallel lines by a third line that intersects them. 2. an angle formed outside a polygon by one side and an extension of an adjacent side; the supplement of an interior angle of the polygon. [1885â90]. (Ä­k-stirâ²stÃ®r-Ä). Ér exterior. Angles angles, 1, 2, 7 and 8 are exterior. angles