10 Questions
What is one of the reasons for using base and lining materials?
Insulation against temperature changes and electrical stimuli under metallic restorations
What property should an ideal lining material have to prevent injuries to the pulp-dentin from restorative materials?
Being insoluble in oral fluids
What is one of the functions of a liner or base material?
Prevention of the risk of long-term damage to the pulp-dentin organ from operative treatment
What is a desirable property of an ideal lining material during insertion of the restoration?
Possessing sufficient physical strength during insertion of the restoration
What effect should an ideal lining material have to improve the marginal seal and have sealing ability?
Bacteriostatic effect
Which material is used to reduce marginal leakage around most filling materials and thus reduce post-operative sensitivity?
Varnish
What is the function of a cement base in dental restorations?
Provide thermal insulation
Why is the need for liners greatest with metallic restorations that are not well bonded to tooth structure?
To reduce inflammatory reaction and post-operative sensitivity caused by marginal leakage
Which component serves to slow down the setting reaction in zinc phosphate cement?
Magnesium oxide
What is the main component of the liquid in zinc phosphate cement?
Ortho-phosphoric acid (40%) with metallic salts
Study Notes
Base and Lining Materials
- One of the reasons for using base and lining materials is to prevent injuries to the pulp-dentin from restorative materials.
- An ideal lining material should have the property of being impermeable to prevent injuries to the pulp-dentin from restorative materials.
- One of the functions of a liner or base material is to protect the pulp-dentin from restorative materials.
Desirable Properties of Lining Materials
- A desirable property of an ideal lining material during insertion of the restoration is that it should be flowable and adaptable to the cavity contours.
- An ideal lining material should have a sealing ability to improve the marginal seal and reduce marginal leakage around the restoration.
Functions of Cement Base
- The function of a cement base in dental restorations is to reduce marginal leakage around most filling materials and thus reduce post-operative sensitivity.
- A cement base is used to reduce marginal leakage around most filling materials.
Liners and Metallic Restorations
- The need for liners is greatest with metallic restorations that are not well bonded to tooth structure.
- This is because metallic restorations that are not well bonded to tooth structure have a higher risk of pulp-dentin injuries.
Zinc Phosphate Cement
- The component that serves to slow down the setting reaction in zinc phosphate cement is phosphoric acid.
- The main component of the liquid in zinc phosphate cement is phosphoric acid.
Test your knowledge about liners and bases materials used in dentistry for pulp protection. This quiz covers the reasons for using base and lining materials, including their roles in providing chemical, electrical, thermal, and mechanical protection.
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