This document discusses the classification of malocclusion according to Edward H. Angle. It describes normal occlusion and defines malocclusion as a deviation from normal dentofacial and skeletal aspects. The main classifications of malocclusion are Class I, Class II, and Class III. Class I is considered neutroclusion and is the most common. Class II is distoclusion and involves a retrognathic mandible. Class III is mesiocclusion and involves a prognathic mandible. Pseudo Class III malocclusion is also discussed.

1. CLASSIFICATION OF MALOCCLUSION
GLO ARBY D. ARGUELLES, DMD

2. CLASSIFICATION OF MALOCCLUSION
 Edward H. Angle
 Relationship of the MESIOBUCCAL CUSP of the MAXILLARY
FIRST MOLAR and the BUCCAL GROOVE of the
MANDIBULAR FIRST MOLAR.

3. NORMAL OCCLUSION
The normal occlusion passes through:
• Central Fossa and along the cingula of Maxillary Teeth
• The buccal cusps and incisal edges of the mandibular teeth.

4. MALOCCLUSION
Deviation from normal dentofacial and skeletal
aspect which causes esthetic, function, and psychological
problem.

5. CLASSIFICATION OF MALOCCLUSION
CLASS I
NEUTROOCCLUSION
• 70% of population.
• The mesiobuccal cusp of the maxillary first molar lines up with the buccal groove
• of the mandibular first molar.
• The maxillary central incisors overlap the mandibular incisors.
• The maxillary canine lies between the mandibular canine and first premolar.

6. CLASSIFICATION OF MALOCCLUSION
CLASS II
DISTOOCCLUSION
• Can also be referred to as retrognathism, or overbite.
• 25% of population.
• The mesiobuccal cusp of the maxillary first molar falls between the mandibular first molar
and the second premolar.
• The lower jaw and chin may also appear small and withdrawn.
• Maxillary canine is mesial to mandibular canine.

7. Class II malocclusion types
• Class II division 1 malocclusion
• Distocclusion
• Overbite and overjet are excessive.
• Upper dental arch assumes a “V” shape w/c is responsible for the protrusion
or labioversion of incisors.
• Associated with abnormal muscle function of the lip.

8. Class II malocclusion types
• Class 2 division 2
• Exaggerated curve of spee.
• Supraversion of the mandibular incisors.
• Excessive lingual inclination of the max. central incisors.
• Excessive labioversion of the max. lateral incisors.

9. CLASSIFICATION OF MALOCCLUSION
CLASS III
MESIOOCCLUSION
• Less than 5% of the population.
• The mesiobuccal cusp of the maxillary first molar falls between the mandibular first molar and
the second molar.
• The chin may be in a protrusive position.
• The maxillary canine is distal to the mandibular canine.
• Can also be referred to as a mesioclusion, prognathism, or underbite.

10. CLASSIFICATION OF MALOCCLUSION
CLASS III
• Class III malocclusions are those in which the body of the mandible and its superimposed dental arch
are in a mesial relationship to the skull base and maxilla.
• The overjet in a class I occlusion is 1–2 mm. In a class III malocclusion, the overjet is 0 mm (edge-to-
edge bite) or negative. (The mandibular incisors are forward relative to the maxillary incisors.)

11. CLASSIFICATION OF MALOCCLUSION
Pseudo Class III malocclusion:
• Describes a situation in which the patient adopts a jaw position upon closure which is forward to
normal.
• Typically, the pseudo class III patient presents with an edge-to-edge bite.
• In order to avoid interference and achieve maximal intercuspation, the patient slides his/her jaw
forward.
• This patient has the ability to bring the mandible back without strain so that the mandibular
incisors touch the maxillary incisors.
• This type is therefore a milder form of the class III malocclusion and more amenable to
conservative orthodontic treatment than the “true” class III malocclusion which often requires
surgical correction.

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