Tooth Discoloration and Bleaching Quiz

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Questions and Answers

What is responsible for the discoloration induced by intrinsic stains incorporated in tooth structures?

Restorative filling materials

Extrinsic stains

Pulp necrosis (correct)

Intrapulpal hemorrhage

What is tooth discoloration defined as?

A change in the shape of a tooth

Any change in the hue, color, or translucency of a tooth due to any cause (correct)

Only intrinsic stains incorporated in tooth structures

Only extrinsic stains deposited on tooth surfaces

What happens to the color of the crown when pulp has been necrotic for a longer time?

The color remains unchanged

The color becomes more intense and greyish brown (correct)

The color becomes lighter and pink

The color turns blue

What causes the tooth to become orange, then blue, then brown or black after intrapulpal hemorrhage?

Haemolysis of RBC and formation of iron sulphide Signup and view all the answers

What is the procedure that involves lightening the color of a tooth through the application of a chemical agent to oxidize the organic pigmentation in the tooth?

Bleaching Signup and view all the answers

What is the characteristic appearance of enamel hypoplasia?

Defective and porous enamel surface Signup and view all the answers

What is the common appearance of enamel hypocalcification?

Distinct brownish or whitish area on the facial aspect of a crown Signup and view all the answers

What systemic condition causes intrinsic bluish, brown, or green discolorations in teeth?

Sickle cell anemia Signup and view all the answers

What causes the release of large amounts of hemosiderin pigment, leading to green, brown, or blue stains on the dentine?

Erythroblastosis fetalis Signup and view all the answers

What may result from substances incorporated into enamel or dentin during tooth formation?

Enamel hypocalcification and enamel hypoplasia Signup and view all the answers

What may cause brown, yellow, or orange stains in the dentine?

Intracanal medicaments Signup and view all the answers

Which type of discoloration is considered intrinsic and affects the inner structure of the tooth?

Discoloration related to endodontic causes Signup and view all the answers

What is responsible for microleakage around a composite filling that may discolor the tooth?

Composite fillings Signup and view all the answers

Which bleaching compound may act as an oxidizing or reducing agent?

Sodium perborate Signup and view all the answers

What is commonly used as a solution for bleaching compounds?

Hydrogen peroxide Signup and view all the answers

Study Notes

Intrinsic Tooth Discoloration

Discoloration is defined as any change in the color of the tooth.
Intrinsic stains are incorporated into the tooth structure during development or after the tooth has erupted.
Necrotic pulp results in discoloration of the tooth crown, becoming increasingly darker over time.
Intrapulpal hemorrhage causes discoloration progression; initially orange from hemoglobin breakdown, then turning blue from biliverdin formation, and finally brown or black due to hemosiderin accumulation.
Tooth bleaching is a procedure that lightens the color of a tooth by oxidizing organic pigmentation.
Enamel hypoplasia presents with pits, grooves, or thin enamel, leading to intrinsic discoloration.
Enamel hypocalcification appears as white or yellow spots or patches due to insufficient calcium deposition.
Tetracycline is a systemic condition leading to intrinsic bluish, brown, or green discolorations in teeth.
Hemorrhage into the pulp causes the release of large amounts of hemosiderin pigment, resulting in green, brown, or blue stains on the dentine.
Intrinsic stains can be caused by substances incorporated into enamel or dentin during tooth formation.
Dental fluorosis can cause brown, yellow, or orange stains in the dentine.
Intrinsic discoloration affects the inner structure of the tooth, unlike extrinsic stains that are on the surface.
Microleakage around a composite filling may allow bacteria to infiltrate, resulting in discoloration.
Hydrogen peroxide is a bleaching compound that can act as an oxidizing or reducing agent.
Water and carbamide peroxide are commonly used as solutions for bleaching compounds.

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Description

Test your knowledge about tooth discoloration and bleaching with this quiz. Learn about the causes of tooth discoloration, including intrinsic and extrinsic stains, and the procedure of bleaching to lighten tooth color.