In class I occlusion the mesiobuccal cusp of the maxillary first molar occludes with the buccal groove of the mandibular first molar.

Question

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In a class I molar relationship the mesiobuccal cusp of the maxillary first molar is directly in line with the buccal groove of the mandibular first molar. The full name of this relationship is called class I occlusal relationship, or neutroclusion.

In Class I Occlusion the Mesiobuccal Cusp of the Maxillary