Which deep occlusion type is characterized by a 'box lid' occlusion?

Which deep occlusion type is characterized by a 'box lid' occlusion?

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

Answer: (B)

In a deep bite, how the upper and lower front teeth overlap vertically is key. The “box lid” view describes a situation where the upper front teeth completely cover the lower front teeth when the jaws meet—like a lid closing over a box. That visual matches the term “Covered,” since the lower incisors are being fully covered by the upper incisors in centric occlusion. The other descriptors don’t fit this specific vertical containment: “on the roof” would imply a different spatial arrangement not describing the lower incisors being hidden, “collapsed” refers to a reduced vertical dimension rather than the front teeth covering each other, and “lateral” denotes side-to-side positioning rather than a front-to-back vertical overlap.

In a deep bite, how the upper and lower front teeth overlap vertically is key. The “box lid” view describes a situation where the upper front teeth completely cover the lower front teeth when the jaws meet—like a lid closing over a box. That visual matches the term “Covered,” since the lower incisors are being fully covered by the upper incisors in centric occlusion.

The other descriptors don’t fit this specific vertical containment: “on the roof” would imply a different spatial arrangement not describing the lower incisors being hidden, “collapsed” refers to a reduced vertical dimension rather than the front teeth covering each other, and “lateral” denotes side-to-side positioning rather than a front-to-back vertical overlap.