1.   His lips parted a little, and she rubbed the pad of her index finger over the edge of his bottom teeth.

2.   Buckteeth, also called an overbite or overjet, is a condition that occurs when the top teeth protrude too far over the bottom teeth.

3.   He sips tea through the gap in his bottom teeth, then softly recites their accomplishments.

4.   When he grins at his own mishaps, you notice that his four bottom front teeth are missing.

5.   Her bottom teeth were bleached to match the whiter veneers.