1. ETIOLOGY OF PREMALIGNANT
CONDITIONS OF ORAL CAVITY
Amin Abusallamah

2. Etiology:
1. Tobacco chewing, Pipe smokers or smoking
2. Alcohol
3. Local irritations
4. Vitamin deficiency : Vit A and Vit B
5. Endocrine disturbances
6. Candidiasis
7. Syphilis
8. Trauma
9. Dental irritation

3. Relative Risk factors for Oral
Cancers
Habit Relative Risk %
 None  1%
 Bettle nut Chewing  4%
 Smoking only  3-6%
 Bettel chewing+Tobacco  8-15%
chewing  4-25%
 Bettel chewing+Smoking  20%
 Bettel+Tobacco+smoking

4. THANK YOU…..
REVERENCE