Miller classification (Tooth mobility)

Tooth mobility can be:

  • Class I
    • Tooth can be moved less than 1mm in the buccolingual or mesiodistal direction

  • Class II
    • Tooth can be moved 1mm or more in the buccolingual or mesiodistal direction
    • No mobility in the occlusoapical direction (vertical mobility)

  • Class III
    • Tooth can be moved 1mm or more in the buccolingual or mesiodistal direction
    • Mobility in the occlusoapical direction is also present
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