1. Anodontia, hypodontia and
oligodontia

2. General information
Several terms are
used to discuss
number of missing
teeth.
It is congenital
absence of teeth

3. Classification
True – it is congenital absence of
teeth
false – it occurs due to extraction of
teeth
pseudo – it occurs due to multiple
unerupted teeth in the jaw

4. Aetiology
Genetic
Evolutionary
trends
X-ray
radiation

5. Clinical features
More common in Mongoloid than whites
Associated features include microdontia, reduced alveolar
development, increased freeway space and retained
primary teeth
Absence may be unilateral or bilateral
commonly missing are third molar, maxillary lateral incisor,
maxillary and mandibular second premolar

6. Management
Orthodontic treatment should be
carried out as many patient may
develop malocclusion
traditional fixed prosthesis and resin
bonded bridges should be given