Sandwich Technique — NDEB AFK MCQ
Instant feedback + full explanation. One question, done properly.
Educational content. Not a substitute for clinical judgement or local policy.
Reveal the answer and explanation
Correct answer: D — Placement of a glass ionomer base covered by composite resin
The sandwich technique (McLean & Wilson, 1977) involves placing a glass ionomer cement (GIC) liner/base in the deepest part of the cavity (replacing dentin) covered by a composite resin restoration (replacing enamel). This combines GIC's advantages (fluoride release, chemical bond to dentin, biocompatibility, thermal insulation) with composite's advantages (aesthetics, strength, polishability, enamel bonding). Resin-modified GIC (RMGIC) is now preferred for the base layer as it bonds to both dentin and composite.
Reference: Heymann – Sturdevant's Art and Science of Operative Dentistry, 7th ed., 2019