Step 1: Cavity Preparation
- A thin layer of affected dentin is intentionally left over the pulp horn to prevent potential pulp exposure.
Step 2: Enamel Etching
- Selectively etch enamel margins with 37% phosphoric acid gel for 15 seconds, then rinse thoroughly.
Step 3: Dentin Conditioning
- Apply GC CAVITY CONDITIONER (20% polyacrylic acid, 3% aluminum chloride) to dentin for 10 seconds, rinse, and gently air dry.
Step 4: Base Placement
- Inject Fuji IXGP EXTRA onto the conditioned dentin to form the foundation for the sandwich technique.
- This material chemically bonds and seals the dentin surface and promotes remineralization of affected areas.
Step 5: Adhesive Application
- Apply G-BOND to all prepared surfaces for 5–10 seconds, air-thin vigorously, and light cure for 10 seconds.
- G-BOND ensures a chemical bond to glass ionomer, etched enamel, and any exposed dentin.
Step 6: Optional Step – Flowable Layer
- Apply a thin layer of radiopaque flowable composite over all internal surfaces to enhance adaptation between the composite resin and bonded layers.
Step 7: Composite Placement
- Place SOLARE X in incremental layers to minimize polymerization shrinkage stress.
Step 8: Layering and Shade Selection
- Complete the build-up using SOLARE X shade A2, finished with an overlay of shade A1 for optimal aesthetics.
Step 9: Finishing and Polishing
- Proper matrix selection and precise placement allow for minimal finishing and polishing.
Step 10: Final Restoration
- The completed restoration demonstrates a successful closed sandwich technique, ensuring durability and a natural aesthetic outcome.
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