Class I is also known as which occlusal relationship?

Class I is also known as which occlusal relationship?

• A. Mesioclusion
• B. End-occlusion
• C. Neutroclusion
• D. Distoclusion

Answer: (C)

In this concept, Class I neutroclusion describes a normal anteroposterior relationship between the arches. The defining feature is the molar alignment: the mesiobuccal cusp of the upper first molar sits in the buccal groove of the lower first molar. That neutral relationship is what neutroclusion conveys. You can have crowding or other misalignments, but the molar AP relationship itself is considered normal. Distoclusion corresponds to Class II (mandible positioned posteriorly relative to the maxilla), mesioclusion to Class III (mandible positioned anteriorly), and end-occlusion is a different sometimes-used term for certain edge-to-edge contacts, not the standard Class I description.

In this concept, Class I neutroclusion describes a normal anteroposterior relationship between the arches. The defining feature is the molar alignment: the mesiobuccal cusp of the upper first molar sits in the buccal groove of the lower first molar. That neutral relationship is what neutroclusion conveys. You can have crowding or other misalignments, but the molar AP relationship itself is considered normal.

Distoclusion corresponds to Class II (mandible positioned posteriorly relative to the maxilla), mesioclusion to Class III (mandible positioned anteriorly), and end-occlusion is a different sometimes-used term for certain edge-to-edge contacts, not the standard Class I description.