Luting Agents (Cements)

Question 1

What materials are used as a luting agent?

Answer 1

DENTAL CEMENTS

• Zinc phosphate
• Zinc carboxylate

GIC

• Conventional
• RM

COMP RESIN LUTING AGENT

• Total etch for use with DBA
• Self etch
• Requires etch but DBA incorporated

Question 2

What is the difference in GIC luting agent and GIC restorative material?

Answer 2

Particle size of glass

SAME chemistry

Question 3

What is the contra-indications for using RMGIC?

Answer 3

• Cementing porcelain crowns; HEMA swells in wet environment –> crack
• Cementing posts; splits roots

Question 4

What material is recommended for bonding to an indirect composite inlay?

Answer 4

• Composite luting resin
  
  • -> comp bonds with comp
• Use a dual curing system as light penetration of inlay will be poor

Tooth | DBA | CLR | Inlay

Question 5

What material is recommended for bonding to porcelain?

Answer 5

• Composite luting resin BUT requires surface wetting agent = Silane Coupling Agent
  
  • -> Dual curing system, light cure if porcelain is thin
• Treat porcelain with hydrofluoric acid to roughen surface (increases retention)
• Apply SCA to etched surface

Tooth | DBA | CLR | Silane | Porcelain

Question 6

What material is recommended for bonding to non-precious metal?

Answer 6

• Composite luting resin BUT requires metal coupling agent
  
  • -> Dual curing system only

SELF-ADHESIVE = Panavia21 has metal bonding agent (MDP) incorporated in resin

Tooth | DBA | CLR | MBA | Non-precious metal

Question 7

What is the type of retention needed for a temporary cement?

Answer 7

Physical

Question 8

What are the two types of temporary cements?

Answer 8

With eugenol

Without eugenol

Question 9

What is the contraindication of using a temporary cement containing eugenol?

Answer 9

Where a RESIN cement will be used in the definitive restoration

(interferes with setting)