What is the 'Angle Class I molar relationship'?
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A
Mesiobuccal cusp of upper first molar occludes in the buccal groove of the lower first molar
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B
Mesiobuccal cusp of upper molar occludes distal to the lower molar buccal groove
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C
Lower first molar is positioned mesial to upper first molar
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D
No specific cusp relationship — based on incisor position only