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Pulp (Pulpal rxn to dental procedures (Restorative or prosthetic…

- - - - contact time, amount of pressure, irrigation, rotational speed of the bur, size + shape of cutting instrument (diamonds>carbides)
    - - Insertion pressures
      - Thermal effects
      - Induced stresses
      - Material toxicity
        
        Cytotoxicity
        
        Hypersensitivity/allergic rxn
        
        unbound components of resin, acid, eugenol induce an inflammatory response (reversible in absence of bacteria)
      - Acid etching 2-5µm (removes protective smear layer)
      - Contraction due to thermal ∆s
      - micro leakage
      - shrinkage from physical + chemical ∆s
      - Elastic deformation of tooth structure by masticatory forces
      - Model of irritation associated with composite restorations
        
        Nano leakage occurs in poorly hybridized resin tags
        
        Internal gap is formed resulting in dentin sensitivity
        
        Bacteria enter from an external gap (open margin) and cause pulpal irritation
  - - - Pulp obliteration
      - necrosis
      - Inflammation
  - - - Delay in elimination of inflammatory mediators
        
        Intraosseous anesthesia
        
        Intraligmanetary anesthesia
  - - - biting + thermal sensitivity
- - - - Formed after tooth eruption @ a slower rate
      - linear calcification
    - - Reparative dentin
        
        Formed by a new generation of odontoblasts
      - Reactionary dentin
        
        Formed by odontoblasts following a mild stimulus (attrition)
      - Formed in response to localized stimuli
      - Globular calcification
    - - Laid down during development b/f tooth eruption
        
        Mantle dentin
        
        Circumpulpar dentin