1. Dental Anomalies
Definition of anomaly- Noticeably different or deviates from norm.

2. Results from: Heredity Tooth Development Defeat
Physical, chemical trauma
Nutritional deficiencies
Stress, habits, environmental

3. Hereditary- occurs because of individual genetic makeup
Congenital- occurs at or before birth
Developmental anomaly- during formation and development of dental structure.

4. VARIATION IN SIZE
Macrodontia- too large
Microdontia- too small

5. VARIATION IN NUMBER Anodontia or Hypodontia- too few
Hyperdontia or Supernumerary- extra teeth

6. VARIATION IN FORM Peg-shaped teeth- max. lateral area
Odontoma- tumorous calcified dental tissues

7. Dents in dente- tooth within a tooth
Gemination- attempt of a tooth bud to divide

8. Fusion- 2 adjacent tooth germs unite.
Dilaceration- severe bend in the root or tooth; usually found in 3rd molars

9. DISTURBANCES IN TOOTH FORMATION
Enamel dysplasia- abnormal enamel development
Enamel hypoplasia- may leave small pits or grooves at different levels in the crown; formed by a systemic interference (fever).

10. Amelogenesis Imperfecta- hereditary, hypocalcification, is very thin, stained various shades of yellow and brown, easily fractured.
Enamel fluorosis- excessive fluoride, opaque white patches in enamel, may be mottled, striated, or pitted.

11. Dentinogenesis imperfecta- hereditary; effects the dentin
Dentinogenesis imperfecta- hereditary; effects the dentin. Causes gray, brown or yellow, but tooth exhibits unusual translucent hue; pulp chambers and canals are filled with dentin.

12. Hypercementosis- excessive cementum formation around the apical third of root after the tooth had erupted.
Tetracycline Staining- when expectant mother takes antibotic called tetracycline; teeth discolor

13. ERUPTION Natal teeth- present at birth; usually no root; shed soon
Neo-natal teeth- erupt within the first 30 days of life; shed soon because of lack of adequate roots

14. Impaction- any tooth that remains unerupted in the jaw beyond the time it would normally erupt.
Ankylosis- fusion of cementum or dentin with alveolar bone.

15. Attrition- gradual and regular loss of tooth substance
Attrition- gradual and regular loss of tooth substance. Caused by bruxism (clenching), chewing tobacco, other oral habits (grinding).
Abrasion- wearing away for dental hard tissue by friction of foreign body. Opening hair pins, excessive pipe smoking, ill fitting partial dentures.

16. Erosion- superficial loss of hard dental tissue by chemical process
Erosion- superficial loss of hard dental tissue by chemical process. Sucking lemons, excessive grape juice, excessive cola
Abnormal resorption- diagnosed by radiographs; rarely causes symptoms. Results from trauma. Impacted teeth, replanted avulsed teeth.