FISSURE SEALANTS

FISSURE SEALANTS

1. Hard insoluable resin material

   • Used in liquid form - flowable resin

2. Fills pits and fissures with cutting enamel

3. FUNCTIONS

   • Eradicate fissures
   • Aid cleaning
     • Prevents caries

4. CLINICAL TECHNIQUE

   • Mechanical cleansing, isolate and dry the tooth.
   • Etch, rinse, isolate, dry
   • Apply resin, polymerise and check occlusion

5. EVALUATION

   • Smooth and check occ
   • No air bubbles
   • under/over extensions

6. THE ACID ETCH TECHNIQUE

   • 30-50% PHOSPHORIC ACID
   • approx 8ym enamel dissolved
   • creates porosities 50ym deep

7. TYPE 1 ETCH PATTERN

   • Prism core removed, peripheral material left
   • Most common etching pattern

8. TYPE 2 ETCH PATTERN

   • Prism core remains intact
   • peripheral regions removed

9. TYPE 3 ETCH PATTERN

   • Haphazard effect
   • Not related to prism morphology

10. SELF POLYMERISED (SELF CURE)

    • 2 solutions mixed
    • Self setting - limited working time
    • ULTRA VIOLET POLYMERISED
      • Not so common
    • Longer application time
    • may cause retinal damage
    • WHITE LIGHT POLYMERISED
      • Longer application time
      • No retinal damage

11. COLOURED FS'S

    • Clear - to see underneath
    • Tinted or Opaque - see loss of sealant

12. FILLED OR NON FILLED

    • Filled with Lithium alumina silicate
    • Increased resistance to abrasion
    • Increased wear on opposing teeth

13. INDICATIONS FOR USE

    • High caries risk, limited manual dexterity
    • Medically comprimised - physical probs/age
      • Cardiac probs, immunosuppressed
        • bleeding disorders, metabolic/endocrine probs
    • Tooth can be isolated
    • Deep Fissures

14. CONTRAINDICATIONS

    • Poor pt co operation
    • Caries present
    • Previously restored tooth

15. Should be reviewed 6/12 and take bw's if poss caries