unerupted molar teeth

Dentition rules:

1. for every 6 months of life, approximately 4 teeth will erupt.
2. Girls generally precede boys
3. Lower teeth usually erupt before upper teeth
4. erupt in pairs
5. Primary teeth are called milk teeth small and white.
6. By to 3 years of age, all primary teeth should have erupted
7. Canines will always erupt second last.
8. Primary teeth erupt in 6-7-8-9 month formula while secondary teeth by respective years.
9. dentition can be delayed due to many causes like rickets.
10. Causes of delayed tooth eruption
    Endocrine disorders
    Hypothyroidism
    Calcium/phosphorus metabolism problems
    Hypopituitarism
    Genetic disorders and bone disorders
    Ectodermal dysplasias
    Down syndrome
    Cleidocranial dysplasia
    Gaucher disease
    Osteoporosis
    Local factors
    Tooth in path of erupting tooth, insufficient space, impacted teeth
    Dental infection
    Radiation therapy

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