Molars

eruption date for 1st Molars

6-7 years old

eruption date for 2nd Molars

11-13 years old

eruption date for 3rd Molars

17-21 years old

which tooth is the first to erupt in the maxillary arch at 6 y/o?

1st molar

Class I Molar Occlusion

MB Cusp of Max 1st molar occludes w/ the MB Groove of Mand 1st molar

Class I: Molar Occlusion Characteristics

• mesognathic profile

• teeh are aligned in smooth arch form

Class I: Malocclusion

molars are in ideal relationship but individual teeth are misalinged

Class II: Malocclusion Characteristic

• retrognathic profile

Class II: Distocclusion; D 1

MB groove of Mand 1st molar is distal to the MB cusp of Max 1st molar by an entire cusp width; over jet + max incisors are protruded

Class II: Distocclusion; D 2

MB groove of Mand 1st molar is distal to the MB cusp of Max 1st molar by an entire cusp width; over jet + max incisors are retruded

Class III: Mesiocclusion

MB groove of Mand 1st molar is mesial to the MB cusp of Max 1st molar by an entire cusp width; underbite/ anterior cross bite

which class can only have tendencies?

Class I

Each side of the mouth can have ___

different classes and malocclusions

what is edge-to-edge called for posterior teeth?

end-to-end malocclusion

eruption date for ALL premolars

10-12 y/o

which teeth can be congenitally missing?

any of the 3rd molars or mand 2nd premolar

eruption date Max Central Incisor

7-8 y/o

eruption date Mand Central Incisor

6-7

eruption date Max Lateral Incisor

8-9 y/o

eruption date Mand Lateral Incisor

7-8 y/o

primary dentition stage

6 months - 6 y/o

Mixed Dentition stage

6 y/o - 12 y/o

when does primary dentition end?

Perm 1st molar and or Mand Central Incisor erupts at 6 y/o

when does permanent dentition begin?

Primary Max Canine is lost

lingually inclined crown is found in ___

all mandibular molars

which cup is the biggest for all Mand molars?

Mesiobuccal cusp

which cup is the smallest for ALL molars?

distolingual cusp

which cusp is the biggest in Max molars?

mesiolingual cusp

Class I: Molar Occlusion

Class II: Distocclusion; D 1

Class II: Distocclusion; D 2

Class III: Mesiocclusion