DEA-105 Mod 3

Unit 3TISSUES OF THETOOTH

TISSUES OF THE TOOTH Four Primary tissues of tooth:

1. 2. 3. 4.

Tissue: Enamel

Characteristics of enamel: Hardest Covers Inorganic ____% Minerals: calcium & phosphorus Composed of enamel rods No ability to repair Color ranges:

Enamel: Thicker at Nutritional disturbances may cause:

Weakened surface of enamel would be more:

Enamel Clinical considerations:

FLUORIDE – can aid in:

Fluoride can be

Enamel:

Primary function:

Helps tooth withstand:

Dentin tissue Characteristics:

Makes up: Harder than:

Inorganic _____% Covered by _______ on crown and Covered by ____________on root

Dentin Characteristics:

Color is: Dentinal tubules form __-shape pattern ___________form dentin

Has ability to:

Dentin: Antibiotic therapy during formation

can cause permanent staining Dental caries progress ____rapidly

through dentin than enamel Dental hypersensitivity if exposed

Dentin Structural changes in development:

Dentin is _____________when formed prior to eruption

________________dentin is formed later in life, in response to trauma

Dentin tissue Sensitivity of dentin:

Dentin reacts to: Sensitivity is not uniform Exposed areas are Patients complain Air-water syringe can

Dentin Functions:

Protection of• NOTE: THE THICKER THE ________

the more ____________for the _______

During cavity preparation, a protective layer of insulation is placed

Dentin Repairs itself in response to trauma

Pulp tissue Characteristics:

Contains: Sensitivity to: Pulp identifies __________ and__________changes, virbrations and___________invasion

Pulp Only soft tissue Pulp tissue in crown ___________ Pulp horns Pulp canal located in ___________

Pulp tissue Functions:

Assist in production of dentin ***Provide sensitivity Act as a defense mechanism by

reacting to injury Provide nourishment to the tooth

Pulp tissue Clinical considerations:

Injury to tooth causes _________ Pressure inside tooth causes______

may require _____________

Cementum Characteristics:

Covers _________ of tooth Bone-like tissue Inorganic ________ Color:

Function: