The 'box lid' occlusion is a feature of which deep occlusion type?

The 'box lid' occlusion is a feature of which deep occlusion type?

• A. On the roof
• B. Covered
• C. Collapsed
• D. Lateral

Answer: (B)

Box lid occlusion describes a deep vertical bite pattern where the anterior teeth sit over and effectively close down on the posterior teeth, like a lid closing over a box. In this scenario the upper incisors project over the lowers so the “lid” covers the “box” formed by the posterior occlusion, which is why this feature is classified as a deep bite with the anterior teeth covering the posterior teeth. The other descriptions don’t fit this image: it’s not about contacting the roof of the mouth, nor about a collapsed vertical dimension or a purely lateral relationship.

Box lid occlusion describes a deep vertical bite pattern where the anterior teeth sit over and effectively close down on the posterior teeth, like a lid closing over a box. In this scenario the upper incisors project over the lowers so the “lid” covers the “box” formed by the posterior occlusion, which is why this feature is classified as a deep bite with the anterior teeth covering the posterior teeth. The other descriptions don’t fit this image: it’s not about contacting the roof of the mouth, nor about a collapsed vertical dimension or a purely lateral relationship.