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Mineral Trioxide Aggregate (MTA) in Endodontics

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Mineral Trioxide Aggregate (MTA) in Endodontics

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Questions and Answers

What is the composition of Mineral Trioxide Aggregate (MTA)?

Tricalcium silicate, tricalcium aluminate, tricalcium oxide, silicate oxide, and other mineral oxides.

What is a characteristic of MTA that allows it to set in the presence of blood and moisture?

Its ability to be set in the presence of blood and moisture.

What is formed when MTA cures in the presence of calcium ions and tissue fluids?

A reactionary layer at the dentin interface resembling hydroxyapatite in structure.

What is a potential reason why MTA prevents further microbial growth of residual microorganisms after caries excavation?

The high alkalinity of MTA and its calcium release and sustained pH at 12.5. Signup and view all the answers

What is thought to be responsible for promoting dentinal bridging?

The growth factors extracted from adjacent dentin. Signup and view all the answers

What is MTA shown to stimulate, according to studies?

Cytokine release. Signup and view all the answers

Study Notes

MTA Introduction

Introduced to endodontics by Lee et al. in the early 1990s
A bioactive silicate cement composed of: • Tricalcium silicate • Tricalcium aluminate • Tricalcium oxide • Silicate oxide • Other mineral oxides

MTA Characteristics

Can be set in the presence of blood and moisture
Exhibits superior marginal adaptation
Non-absorbable
Forms a reactionary layer at the dentin interface resembling hydroxyapatite in structure when it cures in the presence of calcium ions and tissue fluids

Biocompatible Properties

Sustained alkaline pH after curing
Small particle size
Slow release of calcium ions

Biological Effects

Stimulates cytokine release
Induces pulpal cell proliferation
Promotes hard tissue formation
Inhibits microbial growth due to high alkalinity and calcium release
Extracts growth factors from adjacent dentin, promoting dentinal bridging

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Description

Test your knowledge on Mineral Trioxide Aggregate (MTA), a bioactive silicate cement used in endodontics. Learn about its composition, characteristics, and applications in dental procedures. Assess your understanding of MTA as a direct pulp capping material and its use in partial or complete pulpotomy.