Edward Angle introduced a system for classifying malocclusion in 1899 based on the mesiodistal relation of the teeth, dental arch, and jaws. Angle's classification system is widely accepted due to its simplicity. It categorizes malocclusion into three classes based on the position of the lower first molar relative to the upper first molar: Class I is normal relation; Class II is distally positioned lower molar; Class III is mesially positioned lower molar. However, Angle's system does not consider vertical or transverse relationships and cannot be applied when first molars are missing.

1. ANGLE’S CLASSIFICATION OF
MALOCCLUSION
By – Nilesh Patil
BDS - IV yr

2. Introduction
• Edward Angle introduced a system of
classifying malocclusion in the year 1899.
• Angle’s system of classification is undoubtedly
the most widely accepted and used becacuse
of its simplicity in application.

3. Angle’s classification was based on
- mesiodistal relation of the teeth,
- dental arch
- jaws

4. Angle’s assumption when formulation this
classification was that the maxillary 1st
permanent molar is always in correct position
and the variability comes from the mandible.

5. • Thus, he fixed 1st permanent molar as key
point and based on lower 1st molar deviation
in relation to the upper 1st permanent molar
he classified the malocclution.

6. ANGLE’S CLASSIFICATION OF
MALOCCLUSION
• Class i malocclusion
• Class ii malocclusion
• Class iii malocclusion

7. CLASS I MALOCCLUSION
The normal relationship of the molar but line
of occlusion is incorrect because of
malpositioned teeth, rotations or other
causes.
The mesiobuccal cusp of the maxillry first
permanent molar occludes with the
mesiobuccal groove of the mandibular first
molar,

9. CLASS II MALOCLUSION
Lower molar distally position relative to upper
molar, line of occlusion
The mesiobuccal cusp of the lower first
permanent molar occludes distal to the class i
position.

11. CLASS III MALOCCLUSION
lower molar mesially positioned relative to
upper molar, line of occlusion not specified.

13. Limitations of angle’s classification
• The classification can not be applied to the
deciduous dentition.
• Angle considered only anteroposterior
relationship. In this also he had not
mentioned about overjet and canine relation.
• He has not considered vertical plan
relationship and transverse plan relationship.

14. • In angle system upper 1st permanent molar is
a fixed point in the skull but this has not been
found to be so.
• In case of missing 1st molar, this classification
can not be applied.

15. • This system is not differentiating between
skeletal and dental malocclusion.
• This system dose not enlighten about the
etiology of the malocclusions.

16. Thank you