Classification of the Face
It is not sufficient to categorize orthodontic malocclusions on the basis of a classification of the teeth alone. The relationship with other craniofacial structures must also be taken into consideration.
Class I
Facial Profile
Maxillary–Mandibular Dental Protrusion: Teeth
This is an example of a dental malocclusion that may require the removal of teeth for correction.
Facial Profile Characteristics
Maxillary-Mandibular Dental Retrusion: Teeth
This is an example of a dental malocclusion that may be treated with expansion rather than removing teeth.
Class 2
Facial Profile
Maxillary Dental Protrusion: Teeth
This malocclusion may require the removal of teeth.
Facial Profile Characteristics
Mandibular Retrognathism: Jaws
The lower jaw bone has not grown as much as the upper jaw. This example of a Class II malocclusion demonstrates the need for early growth guidance.
Facial Profile
Maxillary Dental Protrusion: Teeth
Mandibular Retrognathism: Jaws
These class malocclusions are more difficult to treat due to the skeletal disharmony and may require orthognathic surgery in conjunction with orthodontic treatment.
Class 3
Facial Profile
Mandibular Dental Protrusion: Teeth
The lower teeth are too far in front of the upper teeth. This malocclusion is treated with orthodontic procedures which may require the extraction of teeth due to the dental protrusion.
Facial Profile Characteristics
Mandibular Prognathism: Jaws
The lower jaw bone has outgrown the upper jaw. This malocclusion is more difficult to treat due to the skeletal disharmony and may require orthognathic surgery in conjunction with orthodontic treatment.
