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Class I
Normal Bite Top and bottom teeth fit well with cusps fitting into grooves created by cusps in opposite arch
Associated Problems: Likely to include crowding, spacing, crossbites, openbite, missing teeth, irregular alignment, periodontal problems and many more.
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Class II, Division 1
Buck or Protruded Teeth Top teeth ahead of bottom teeth, with front teeth flaring
Associated Problems: Likely to include lower lip trap, thumb habit, crowding, spacing, crossbites, openbite, retrusive profile, irregular alignment, and many more.
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Class II, Division 2
Deep Overbite Top teeth ahead of bottom teeth, with top front tipped inward
Associated Problems: likely to include lower lip trap, thumb habit, crowding, spacing, crossbites, openbite, retrusive profile, irregular alignment, and many more.
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Class III – Underjet
Top teeth behind bottom teeth
Associated Problems: likely to include under developed (small) upper jaw, overly large lower jaw, crowding, crossbites, prominent chin, and many more.
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Miscellaneous Issues
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Congenital Defects
Teeth, jaws or other structures that don’t develop normally
Associated Problems: likely to include teeth that don’t form, cleft lip and palate and others.
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