Which of the following type of GIC is used as a base?: (A) Type I, (B) Type IIa, (C) Type IIb, (D) Type III
Answer is D. Type I: Luting crowns, bridges and orthodontic brackets.
Type IIa: Esthetic restorative cements.
Type IIb: Reinforced restorative cements.
Type III: Lining cements, base.
Ref: Phillip’s Science of Dental Materials ed 12 pg 320