Dental Amalgam

These flashcards cover key concepts, definitions, advantages, and concerns related to dental amalgam based on the provided lecture notes.

What are the main components of dental amalgam?

composed of silver and tin, with copper and other metals added.

What shapes can dental amalgam alloy particles have?

Irregular, spherical, and admixed shapes.

How does mixing time affect the strength of amalgam?

Affects the strength and manipulation of the material.

What are some advantages of dental amalgam as a restorative material?

Easy to manipulate, durable, and low cost.

What disadvantages are associated with dental amalgam?

Not esthetic and safety has been questioned.

What is the function of a matrix band in dental procedures?

It helps to hold the amalgam in place during the setting process.

What is the difference between high-copper and low-copper amalgam?

High-copper amalgam is stronger, corrode less, and has better marginal integrity.

What is creep in relation to dental amalgam?

The gradual deformation of amalgam under stress over time.

What is the significance of tarnish and corrosion in dental amalgam?

Tarnish affects aesthetic while corrosion can weaken the material.

Why is proper handling of amalgam important?

It minimizes risk of mercury exposure and ensures effective material properties.

What measures are taken for recycling amalgam scrap?

Collect and process amalgam scrap to minimize environmental impact.

What should be done before chewing hard food on a new amalgam restoration?

Wait approximately 24 hours.

What does the ADA state about the safety of dental amalgam?

The ADA reaffirms that dental amalgam is a durable, safe, and effective cavity-filling option.

What are best practices for reducing mercury exposure in dental offices?

Use of rubber dams, high-volume evacuation, and proper containment of amalgam waste.

What were restrictions placed on amalgam use in the 1980s in Japan?

Prohibited use on children and pregnant females.

What are the main components of dental amalgam?

composed of silver and tin, with copper and other metals added.

What shapes can dental amalgam alloy particles have?

Irregular, spherical, and admixed shapes.

How does mixing time affect the strength of amalgam?

Affects the strength and manipulation of the material.

What are some advantages of dental amalgam as a restorative material?

Easy to manipulate, durable, and low cost.

What disadvantages are associated with dental amalgam?

Not esthetic and safety has been questioned.

What is the function of a matrix band in dental procedures?

It helps to hold the amalgam in place during the setting process.

What is the difference between high-copper and low-copper amalgam?

High-copper amalgam is stronger, corrode less, and has better marginal integrity.

What is creep in relation to dental amalgam?

The gradual deformation of amalgam under stress over time.

What is the significance of tarnish and corrosion in dental amalgam?

Tarnish affects aesthetic while corrosion can weaken the material.

Why is proper handling of amalgam important?

It minimizes risk of mercury exposure and ensures effective material properties.

What measures are taken for recycling amalgam scrap?

Collect and process amalgam scrap to minimize environmental impact.

What should be done before chewing hard food on a new amalgam restoration?

Wait approximately 24 hours.

What does the ADA state about the safety of dental amalgam?

The ADA reaffirms that dental amalgam is a durable, safe, and effective cavity-filling option.

What are best practices for reducing mercury exposure in dental offices?

Use of rubber dams, high-volume evacuation, and proper containment of amalgam waste.

What were restrictions placed on amalgam use in the 1980s in Japan?

Prohibited use on children and pregnant females.

What is the role of copper in high-copper amalgam?

Copper reacts with tin to eliminate the undesirable Gamma-2 phase, improving strength and corrosion resistance.

What is the Gamma-2 phase in amalgam and why is it undesirable?

The Gamma-2 phase ($\text{Sn}_8 ext{Hg}$) is a tin-mercury phase found in low-copper amalgam that contributes to corrosion and creep, reducing the material's longevity.

What is trituration in the context of dental amalgam?

It is the mechanical mixing of the amalgam alloy with liquid mercury, typically done in an amalgamator, to initiate the setting reaction.

What is the primary risk associated with mercury from dental amalgam in a dental office?

Inhalation of mercury vapor, which can be released during placement, removal, or from improper handling of amalgam waste.

What is the purpose of condensation during amalgam placement?

Condensation compacts the amalgam into the cavity preparation, eliminating voids and adapting it to the cavity walls to achieve maximum density and strength.