1. Malocclusion: Classification based on intra-arch problem
Intra-arch problems: malpositions of individual or group of teeth in the same arch
 i. Sagittal problems
Labioversion
Linguoversion
Mesioversion
Distoversion
ii. Transverse problems
Crowding
Spacing
Buccoversion
iii. Vertical problems
Supraversion
Infraversion
iv. Rotated teeth
v. Transposition of teeth

2. Intra-arch problems
Labioversion :A tooth that has assumed a position labial to normal
Lingoversion: Position lingual to normal

3. Palatoversion: Position palatal to normal
Buccoversion: Position buccal to normal

4. Supraversion : Over-erupted beyond the level of occlusion
Infraversion: Depressed below the line of occlusion, for example, primary tooth that is submerged or ankylosed

5. Torsiversion: rotated on its long axis