What is underbite?

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Learn about Temporomandibular Disorder with our interactive test. Explore flashcards and multiple choice questions with hints and explanations to boost your understanding. Ace the TMD exam with confidence!

Multiple Choice

What is underbite?

Explanation:
Underbite is when the lower jaw projects forward so the mandibular teeth sit in front of the maxillary teeth when the mouth is closed. This anterior position of the lower teeth defines a Class III malocclusion and often results in a negative overjet, meaning the lower front teeth bite ahead of the upper front teeth. The description where the mandibular teeth are ahead of the maxillary teeth best captures underbite. If the upper teeth were ahead, that would describe the opposite relationship (a different malocclusion). A bite with no occlusion or just teeth out of alignment describes other issues, not the specific forward-positioning of the lower teeth.

Underbite is when the lower jaw projects forward so the mandibular teeth sit in front of the maxillary teeth when the mouth is closed. This anterior position of the lower teeth defines a Class III malocclusion and often results in a negative overjet, meaning the lower front teeth bite ahead of the upper front teeth. The description where the mandibular teeth are ahead of the maxillary teeth best captures underbite. If the upper teeth were ahead, that would describe the opposite relationship (a different malocclusion). A bite with no occlusion or just teeth out of alignment describes other issues, not the specific forward-positioning of the lower teeth.

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