COMPOSITE RESIN

COMPOSITE RESIN

1. resin matrix, filler, silane coupling agent

2. Non adhesive material - requires bonding agent

3. Hydrophobic, photophillic

4. polymerisation shrinkage

5. place in small increments - only cures at 2mm

   • pts can be hypersenitive to products

6. ADVANTAGES

   • Wear and compressive resistance matches tooth substance
   • command set - light cure
   • good aesthetics
   • more conservative of tooth tissue

7. DISADVANTAGES

   • polymerisation shrinkage
   • moisture control essential
   • technique of placement
     • 2mm increments - time consuming

8. TECHNIQUES TO OVERCOME POLYMERISATION

   • keep field as dry as poss - will shrink away from water
   • ramped output from light source
   • place in oblique increments
   • direct light to gingival floor

9. CLINICAL INDICATIONS

   • Anterior - classIII, IV, V
   • Posterior - Class I, II, V
   • Deciduous restorations

10. ANTERIOR - outline form, access from palatal/lingual aspect

    • keep prep as min as possible - use small round bur
    • Remove caries from ADJ and as much stained dentine - better aesthetics
    • Bevel enamel edges for larger surface area of bonding
    • Apply comp in increments using clear matrix and cure for 30secs

11. CLINICAL HANDLING OF COMP IN ANT TEETH

    • Best aesthetic result when final increment is placed
    • placed under clear matrix removes oxygen layer