What is the correct order of steps when cementing veneers using resin cement?

What is the correct order of steps when cementing veneers using resin cement?

• A. Hydrofluoric acid etch veneer; Silane; Etch and bond the tooth; Cement
• B. Silane; Hydrofluoric acid etch veneer; Etch and bond the tooth; Cement
• C. Etch and bond the tooth; Hydrofluoric acid etch veneer; Silane; Cement
• D. Cement; Hydrofluoric acid etch veneer; Silane; Etch and bond the tooth

Answer: (A)

For bonding veneers with resin cement, you must maximize both the porcelain–cement and tooth–cement interfaces. Start by etching the veneer with hydrofluoric acid to create microroughness and increase surface area. After that, apply a silane coupling agent to form chemical bonds between the silica in the ceramic and the resin, improving durability at the porcelain–resin interface. Next, prepare the tooth surface by etching the enamel with phosphoric acid and applying the bonding agent to establish a strong micromechanical and chemical bond on the tooth side. Finally, apply the resin cement and seat the veneer, then remove excess cement and cure. This order is important because etching the veneer first creates the proper surface texture for silane to bond effectively; applying silane after ensures a strong porcelain–resin linkage. Bonding the tooth is done after the veneer surface is prepared so the tooth surface can form a robust interface with the cement. Cement is placed last to secure seating and allow proper polymerization.

For bonding veneers with resin cement, you must maximize both the porcelain–cement and tooth–cement interfaces. Start by etching the veneer with hydrofluoric acid to create microroughness and increase surface area. After that, apply a silane coupling agent to form chemical bonds between the silica in the ceramic and the resin, improving durability at the porcelain–resin interface. Next, prepare the tooth surface by etching the enamel with phosphoric acid and applying the bonding agent to establish a strong micromechanical and chemical bond on the tooth side. Finally, apply the resin cement and seat the veneer, then remove excess cement and cure.

This order is important because etching the veneer first creates the proper surface texture for silane to bond effectively; applying silane after ensures a strong porcelain–resin linkage. Bonding the tooth is done after the veneer surface is prepared so the tooth surface can form a robust interface with the cement. Cement is placed last to secure seating and allow proper polymerization.