California Registered Dental Assistant (RDA) Written Practice Exam

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When a person occludes and mandibular anterior teeth cannot be seen, the diagnosis is

Underbite
Crossbite
Overbite
Misalignment

The correct answer is: Overbite

An occlusion is the way your teeth come together. Therefore, when a person occludes and mandibular anterior teeth cannot be seen, it means that the upper teeth are overlapping too much over the lower teeth, making it impossible to see the lower front teeth. This is known as an overbite. An underbite refers to when the lower teeth overlap the upper teeth. A crossbite refers to when the upper teeth overlap the lower teeth on one side. Misalignment could refer to any issue with the alignment of the teeth, including overbite, underbite, or crossbite.