Dental Endodontic Materials and Sealer Quiz
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Questions and Answers

What are the prerequisites for the formation of a monoblock?

  • The core material should bond weakly with the cement.
  • The primary monoblock should have two interfaces.
  • The MOE of the monoblock and the MOE of the medium should be dissimilar.
  • The medium and the dentin wall should bond strongly. (correct)

Which type of sealer is commonly associated with a primary monoblock?

  • Resin sealer
  • Silicone sealer
  • Bioceramic sealer (correct)
  • None of the above

What is the precise definition of 'monoblock'?

  • A multi-interface bonded structure
  • A single cohesive unit (correct)
  • A mechanically heterogeneous unit with root dentin
  • A solid, bonded, continuous material with no dentin wall involvement

Which of the following is NOT a cause of microleakage in root canal obturation?

<p>Enhanced adhesion and wetting (B)</p> Signup and view all the answers

What distinguishes secondary monoblock from primary monoblock?

<p>Two interfaces between core material and cement (D)</p> Signup and view all the answers

Why is gutta percha considered too plastic to strengthen the roots?

<p>It has a modulus of elasticity much lower than dentin (B)</p> Signup and view all the answers

What type of root canal obturation system is known for creating a single cohesive unit with the dentin wall?

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

What is the primary reason for conventional gutta-percha's failure mentioned in the text?

<p>It does not bond to canal walls (A)</p> Signup and view all the answers

Which system is composed of a core material containing gutta-percha impregnated and coated with glass ionomer on its external surface?

<p>Activ GP (A)</p> Signup and view all the answers

What type of bond does the glass ionomer in Activ GP create with the dentin?

<p>Ionic bond (D)</p> Signup and view all the answers

Which obturation system forms a solid and optimal seal, creating a true monoblock in the canal space?

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

What unique property of EndoREZ sealer allows it to penetrate dentinal tubules?

<p>Hydrophilic properties (A)</p> Signup and view all the answers

Why is improvisation for enhanced adaptability of GP attempted by surface modification?

<p>To achieve chemical and micromechanical adhesion (D)</p> Signup and view all the answers

What makes bioceramic coated materials beneficial for sealing canals according to the text?

<p>They enhance the quality of obturation using specific hydrophilic bioceramic sealers (C)</p> Signup and view all the answers

What is the primary reason for considering root canal obturations as secondary monoblock systems despite poor bonding between sealers and dentin?

<p>The homogenous single unit formation by gutta percha cones and sealers (D)</p> Signup and view all the answers

What differentiates Tertiary monoblocks from secondary monoblocks according to the text?

<p>The formation of third interface between abutment material and bonding substrate (C)</p> Signup and view all the answers

Flashcards

Primary Monoblock

A strong bond between the sealer and dentin forms a single, cohesive unit with the root filling material.

Monoblock

A cohesive unit formed between the sealer, dentin walls, and the root filling material, creating a solid and optimal seal in the canal space.

Secondary Monoblock

A weak bond between the sealer and dentin, although a solid seal in the canal space is still achieved.

Flow and Film Thickness

The ability of the sealer to penetrate dentinal tubules and create a thin, uniform layer.

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Tertiary Monoblock

A strong bond between the sealer and dentin is achieved, forming a cohesive unit with the root filling material.',

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Gutta-Percha and Root Strength

The lack of rigidity in gutta-percha makes it unsuitable for strengthening roots, as it cannot effectively resist forces that may cause root fracture.

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Gutta-Percha and Dentin Bonding

Gutta-percha's inability to bond with dentin makes it prone to leakage and failure.

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Activ GP

A root canal obturation material containing gutta-percha, coated in glass ionomer to enhance bonding with dentin.

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EndoREZ sealer

This sealer is known for its ability to penetrate dentinal tubules due to its unique properties.

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Surface Modification of Gutta Percha

The process of changing the gutta-percha surface to increase its adaptability in the root canal.

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Bioceramic Coated Materials

Coatings made of bioceramic materials enhance sealing by providing a strong bond with dentin.

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Monoblock Formation

The prerequisites for a monoblock include a bond between the sealer and dentin, as well as adaptation of the sealer to the canal walls and the root filling material.

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Flow and Film Thickness

A material's ability to flow and create a thin layer that can create a solid seal.,

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Primary vs. Secondary Monoblock

The inability to bond between the sealer and dentin.

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Monoblock

A cohesive unit formed between the sealer, dentin walls, and the root filling material, creating a solid and optimal seal in the canal space.

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Tertiary Monoblock

The ability of a sealer to bond with dentin and create a cohesive unit with the root filling material.

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Study Notes

Formation of a Monoblock

  • The prerequisites for the formation of a monoblock include a bond between the sealer and dentin, and adaptation of the sealer to the canal walls and root filling material.

Primary Monoblock

  • A primary monoblock is associated with epoxy resin-based sealers, such as AH Plus.
  • In a primary monoblock, the sealer forms a strong bond with the dentin and the root filling material, creating a single cohesive unit.

Definition of Monoblock

  • A monoblock refers to the creation of a single cohesive unit with the dentin wall, resulting in a solid and optimal seal in the canal space.

Causes of Microleakage

  • The options that are NOT causes of microleakage in root canal obturation are not listed in the text.

Primary vs. Secondary Monoblock

  • Secondary monoblocks are distinguished from primary monoblocks by their poor bonding between sealers and dentin.

Gutta Percha

  • Gutta percha is considered too plastic to strengthen the roots because it lacks the rigidity to resist forces that can cause root fracture.
  • Conventional gutta-percha fails primarily due to its inability to bond with dentin.

Obturation Systems

  • Activ GP is an obturation system composed of a core material containing gutta-percha impregnated and coated with glass ionomer on its external surface.
  • The glass ionomer in Activ GP creates a chemical bond with the dentin.

EndoREZ Sealer

  • EndoREZ sealer is known for its ability to penetrate dentinal tubules due to its unique property of flow and film thickness.

Surface Modification of Gutta Percha

  • Surface modification of gutta percha is attempted to enhance its adaptability through improvisation.

Bioceramic Coated Materials

  • Bioceramic coated materials are beneficial for sealing canals due to their ability to form a strong bond with dentin.

Secondary Monoblocks

  • Root canal obturations are considered secondary monoblock systems despite poor bonding between sealers and dentin because they still provide a solid seal in the canal space.

Tertiary Monoblocks

  • Tertiary monoblocks are differentiated from secondary monoblocks by their ability to form a strong bond between the sealer and dentin, as well as the root filling material.

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Description

Test your knowledge about dental endodontic materials such as surface modified gutta percha, medicated gutta percha, water expandable root canal obturation system, MTA, resin sealer, silicone sealer, and bioceramic sealer. Explore causes of microleakage including thermal stresses, occlusal loading, water sorption, poor adhesion and wetting, and polymerization shrinkage. Understand the monoblock concept in endodontics.

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