Molar Relationships

Question 1

What is a Class I molar relationship defined as?

Answer 1

The mesiobuccal cusp of the maxillary first molar occluding in line with the buccal groove of the mandibular first molar
I.e. The maxillary first molar is slightly posteriorly positioned relative to the mandibular first molar

Question 2

What is a Class II molar relationship defined as?

Answer 2

The mesiobuccal cusp of the maxillary first molar occluding to the buccal groove of the mandibular first molar
I.e. The maxillary first molar is inline with or anteriorly positioned relative to the mandibular first molar

Question 3

What is a Class III molar relationship defined as?

Answer 3

The mesiobuccal cusp of the maxillary first molar occluding posterior to the buccal groove of the mandibular first molar
I.e. The maxillary first molar is severely posteriorly positioned relative to the mandibular first molar

Question 4

What is a half unit Class II relationship?

Answer 4

Where the mesiobuccal cusp of the maxillary first molar occludes with the mesiobuccal cusp of the maxillary first molar occludes with the mesiobuccal cusp of the mandibular first molar
Edge-to-Edge