Fig. 4 Reverse bite
When your upper teeth bite inside the arch of the lower teeth.

Fig. 5 Open bite
Your front teeth remain open as your back teeth meet, so the tongue is visible between the upper and lower teeth.

Fig. 6 Upper and lower centre lines not aligned.
The centre lines in the upper and lower teeth do not meet, this mismatch is often caused by drifting of teeth or a shift of the lower jaw, resulting in an improper bite.

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