Periodontal Disease's Predisposing Factors

• poor oral hygiene
• low compliance with the dentist and inadequate recalls
• systemic deseases or other psycological and physical conditions that may reduce the body defense mechanism to fight infections
• malnutrition
• lack of function of opposing teeth (ex. becouse teeth are missing)
• smoking
• tartar
• caries
• inadequate dental restorations
• crowded and malpositioned teeth
• anatomical conditions that can interfere with plaque control

Carie's Predisposing Factors

• poor oral hygiene
• frequent consumption of sugar (liquid or solid) or sour food (ex. orange juice)
• low calcified enamel with superficial defects
• exposure of dental roots (the cementum that covers roots is not as hard as enamel, therefore it is easily attacked by acids)
• crowded and malpositioned teeth
• fixed orthodontic appliance (provide retentive areas)
• inadequate dental restorations
• reduced saliva production (the saliva contains substances able to fight the acidity produced by sugars and remineralize dental surfaces)
• soft diet
• lack of function or use of teeth (eliminates effectiveness of natural cleansing)
  

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