Calcium Hydroxide Liners Review
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Questions and Answers

What is the primary purpose of cavity liners according to Marzouk et al?

  • To enhance the aesthetic appearance of the tooth
  • To promote faster healing of the tooth structure
  • To provide a base for restorative materials
  • To protect the pulp from irritants (correct)

What materials are commonly included in cavity liners as mentioned in the content?

  • Amalgam and resin-bonded agents
  • Silicates and zinc oxide eugenol
  • Glass ionomer cements and resin composites
  • Calcium hydroxide and mineral trioxide aggregate (MTA) (correct)

What is a significant distinction made between liners and suspension liners?

  • Liners have a thicker application than suspension liners
  • Suspension liners are applied in a single layer
  • Liners are only used for posterior teeth
  • The terms should not be used synonymously (correct)

What is the maximum film thickness of cavity liners as described?

<p>25 µm (C)</p> Signup and view all the answers

What is the purpose of applying a liner in a cavity preparation?

<p>To seal the dentine and prevent bacterial influx (D)</p> Signup and view all the answers

What is the primary objective of the review on calcium hydroxide liners?

<p>To integrate literature on cavity liners and pulp protection (B)</p> Signup and view all the answers

What research databases were searched for articles related to calcium hydroxide liners?

<p>PubMed, MEDLINE, and Ovid (A)</p> Signup and view all the answers

According to the review, under which condition should calcium hydroxide liners be used?

<p>Only in the deepest spots with dentine thickness ≤0.5 mm (D)</p> Signup and view all the answers

What should follow the application of calcium hydroxide liners?

<p>A protective layer of resin-modified glass ionomer (C)</p> Signup and view all the answers

How does this review classify the inclusion criteria for the articles reviewed?

<p>Flexible with no specific criteria (B)</p> Signup and view all the answers

What was the objective of conducting a comprehensive literature review on calcium hydroxide?

<p>To enhance understanding of calcium hydroxide's role as a liner (A)</p> Signup and view all the answers

Which of the following is NOT a focus area of the review on calcium hydroxide liners?

<p>Cavity cleaning techniques (A)</p> Signup and view all the answers

What aspect of calcium hydroxide liners does the review emphasize?

<p>The specific application in extreme cavity depths (D)</p> Signup and view all the answers

What has been reported as the liner of choice for deep cavities in clinical practice?

<p>Calcium hydroxide (C)</p> Signup and view all the answers

According to the literature, why might liners not be used alone in deep cavities?

<p>They lack sufficient strength (B)</p> Signup and view all the answers

Which material is defined as a suspension or dispersion that can be applied as a thin film on a tooth surface?

<p>Calcium hydroxide (A)</p> Signup and view all the answers

What is one of the common issues regarding the definition of 'liners' in dental literature?

<p>It has led to confusion among practitioners (A)</p> Signup and view all the answers

What do Heymann et al. state about liners?

<p>They can be different types of materials (D)</p> Signup and view all the answers

Which of the following best describes the thickness of a cavity liner?

<p>Relatively thin film (D)</p> Signup and view all the answers

What is the primary goal of using liners and bases in operative dentistry?

<p>To preserve pulp vitality in compromised teeth (B)</p> Signup and view all the answers

Which material has long been regarded as the gold standard for pulp protection?

<p>Calcium hydroxide (D)</p> Signup and view all the answers

What should general dentists gain from the review on calcium hydroxide liners?

<p>A comprehensive overview for better clinical application (D)</p> Signup and view all the answers

What is a significant limitation of using liners according to the provided content?

<p>They may not hold up under high stress (C)</p> Signup and view all the answers

What therapeutic effect is promoted by the use of liners under restorations?

<p>Sealing against microorganisms and their by-products (D)</p> Signup and view all the answers

How has the understanding of pulp protection evolved over time?

<p>There is a growing recognition of the importance of pulpal health (A)</p> Signup and view all the answers

What traditional lining materials are commonly used for pulp protection?

<p>Calcium hydroxide, glass ionomer, and resin-modified glass ionomers (A)</p> Signup and view all the answers

What is a significant reason for the continuous recommendation of liners in restorative procedures?

<p>They actively promote the deposition of tertiary dentine (C)</p> Signup and view all the answers

What has been one of the evolving concepts regarding the use of liners?

<p>Their therapeutic effect is just as important as their sealing properties (B)</p> Signup and view all the answers

What is the role of liners beneath restorations in terms of pulp health?

<p>To maintain and protect pulp vitality (A)</p> Signup and view all the answers

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Flashcards

Cavity Liner

A material placed inside a tooth cavity to protect the pulp (the living tissue inside the tooth) from irritation and damage.

Calcium hydroxide

Calcium hydroxide is a chemical that is commonly used as a cavity liner due to its ability to promote the formation of dentin (the hard tissue that makes up the tooth) and protect the pulp.

When to use calcium hydroxide?

When the remaining dentin thickness in a cavity is very thin (less than 0.5 mm), calcium hydroxide should be used as a liner to protect the pulp.

Resin-modified Glass Ionomer

A resin-modified glass ionomer is a type of dental material that is often used to seal the cavity and protect the calcium hydroxide liner from being removed.

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Important step after using calcium hydroxide

Calcium hydroxide should always be covered with a resin-modified glass ionomer for optimal protection.

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Deep cavity

A deep cavity is a cavity where the remaining dentin layer is very thin (less than 0.5 mm).

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Pulp

The pulp is the living tissue inside the tooth that contains nerves and blood vessels.

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Dentin

Dentin is the hard tissue that surrounds the pulp and forms the main body of the tooth.

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Pulp Protection

This procedure aims to maintain the health of the pulp and stimulate its repair by forming new dentin.

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Base

A layer of material placed between the pulp and the restorative material to provide a protective barrier.

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Resin-modified glass ionomer (RMGI)

A type of material that combines the properties of glass ionomer and resin, offering both strength and adhesion.

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Liner

A material used as a liner to seal the dentinal tubules, preventing bacteria and their byproducts from reaching the pulp.

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Tertiary Dentin Deposition

The process of forming new dentin by the pulp in response to an irritation or injury.

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What is a cavity liner?

A material placed inside a tooth cavity to protect the pulp (the living tissue inside the tooth) from irritation and damage.

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What is calcium hydroxide used for?

Calcium hydroxide is a common material used as a cavity liner. Its ability to promote dentin formation and protect the pulp makes it a suitable choice.

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What is a deep cavity?

A deep cavity is one where the layer of dentin remaining is very thin (less than 0.5 mm). This makes the pulp vulnerable.

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Why is calcium hydroxide used in deep cavities?

In a deep cavity, calcium hydroxide is often used as a liner to protect the delicate pulp from irritation.

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What is a liner in dentistry?

A thin layer of material placed on the bottom of a cavity to protect the pulp.

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What is RMGI used for?

A resin-modified glass ionomer (RMGI) is frequently used to seal the cavity and protect the calcium hydroxide liner.

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What should be done after applying calcium hydroxide?

Calcium hydroxide should ideally be covered with RMGI to ensure its effectiveness and prevent it from being removed during the filling process.

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What has been a source of confusion in dental literature?

The definition of "liner" in dentistry has sometimes been unclear, leading to confusion in dental literature.

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Cavity Sealer

A material that forms a thin film that seals the dentin and prevents bacteria or irritants from entering the pulp.

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Film-forming Material

A type of material used as a cavity liner, typically containing calcium hydroxide or MTA.

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Suspension Liners

Materials that are placed directly on dentin and form a protective layer, usually containing fluoride or other therapeutic agents.

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Study Notes

Calcium Hydroxide Liners: A Literature Review

  • Calcium hydroxide liners are used in operative dentistry to preserve pulp vitality in compromised teeth
  • Liners are placed on unexposed pulp to maintain health and stimulate dentin deposition
  • Liners have been used traditionally to protect the pulp from harmful materials during restorations
  • Current use is for therapeutic effects and/or sealing dentin tubules to prevent ingress of microorganisms
  • Traditional lining materials include calcium hydroxide, glass ionomer, and resin-modified glass ionomers (RMGIs)
  • Calcium hydroxide is a popular choice, often considered the gold standard for liners in deep cavities

Types of liners

  • Calcium hydroxide:

    • Available as aqueous suspensions, cements, and filled resins
    • High solubility in water, can be problematic under restorations if not properly sealed
    • Often recommended only if remaining dentin thickness is ≤0.5 mm.

  • Resin-modified glass ionomers (RMGIs):

    • Often used as a base to cover calcium hydroxide due to better properties like low solubility
    • Should be used in cavities with RDT’s greater than 0.5mm

  • Zinc oxide eugenol (ZOE):

    • Not commonly used as liners now
    • Considered for some clinical applications

  • Mineral trioxide aggregate (MTA):

    • Not typically recommended as a cavity liner due to relatively low compressive strength and slower-setting properties

Definitions of Liners

  • The definition of liners is sometimes confusing in dental literature
  • Some define liners as film forming materials with therapeutic agents.
  • Others describe them as materials placed in a thin layer to seal dentine during restorative procedures, and for possible therapeutic benefits.

Ideal Properties of Cavity Liners

  • Antibacterial properties are desirable to prevent bacterial growth
  • Calcium hydroxide liners display some antibacterial properties.
  • High adhesion to both dentin and restorative materials is critical to limit leakage and protect the pulp effectively
  • Stability and longevity are required properties for a liner
  • Thermal insulation is desirable, especially in deep cavities

Clinical Use and Recommendations

  • Use of cavity liners depends on the RDT (remaining dentin thickness) (ideally ≤0.5 mm)
  • Current methods advocate that RMGIs should be placed over calcium hydroxide to seal the dentin tubules

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Calcium Hydroxide Liners: A Literature Review PDF

Description

Explore the use of calcium hydroxide liners in operative dentistry, focusing on their role in preserving pulp vitality and stimulating dentin deposition. This quiz covers traditional and modern materials, their therapeutic effects, and sealing capabilities against microorganisms. Test your knowledge on the gold standard materials used in deep cavities.

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