8 Pulp Flashcards by K Seymour

Identify.

Pulp cavity

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Which part of the tooth germ becomes the pulp?

Dental papilla

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Left/top: odontoblastic layer (cell bodies) Right/bottom: cell free zone

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Odontoblastic layer Cell free zone Cell rich zone

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Predentin. Odontoblast: cell bodies Cell free zone

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Detnin (mineralized) Odontoblast cell bodies Cell rich zone Core

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Dentinopulpal junction. Cell rich zone.

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Identify the prominent cells.

Odontoblast 2. Fibroblast

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Identify which function is carried out by the vast blood supply of pulp tissue. Formative Sensory Defense Nutritional Lysis

Nutritional only.

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Is the marked site mineralized or unmineralized?

Unmineralized predentin

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Nerve.

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Top: Cell free zone Bottom: Nucleus of odontoblast

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Left:: cell body Middle: odontobalst Right: cell process

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What pulp function is carried out by the marked structures? Formative Nutritional Sensory Defense Lysis

Nerve. Sensory only.

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Is this horizontal section cut through: A. pulp chamber B. mid-root canal C. apical root canal

C. Note large size of blood vessels and nerves in relation to pulp tissue volume.

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Identify.

Pulp stone (denticle, common site)

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Bottom/left: diffuse mineralization Top/right: pulp stone (denticle)

Identify.

Free pulp stone (denticle) 2. Attached denticle

identify branching white structures.

nerve fibers

Which identifies a normal appearing pulp tissue?

A: Injured. Note paucity of cells and lack of layers. B: Normal. Note distinct pulpal zones or layers and cellular density.

What part of a tooth contains nerve, blood vessels, and lymph vessels? A. pulp chamber only B. root canal only C. pulp cavity D. dentin

C. They are found throughout the entire volume of pulp tissue. Pulp cavity = pulp chamber + root canal

Pulp tissue, when compared to enamel, dentin, and cementum, has several different features. Which one of the following is one of the different features? A. Whole cells B. Blood vessels C. Hydroxapatite crystals D. Collagen fibrils

B. Blood vessels are found throughout the pulp volume. It is the only tissue of a tooth that contains blood vessels.

Rashkow’s plexus of the pulp is a network of which of the following? A. blood vessels B. lymph vesels C. blood and lymph vessels D. nerves

D. Nerve plexus int he area of the cell rich zone. Nerve fibers arise from the plexus and pass into the odonotoblastic cell body layer and end as free nerve endings.

Blood vessels and nerves are larger and occupy most of the volume of which of the following sites? A. Upper third of pulp chamber B. Middle third of pulp chamber C. Upper third of root canal D. Apical third of root canal

D. View the horizontal section of the apical third and note the size of the blood vessels and nerves, and that they occupy most of the volume.

The larger pulpal blood and lymph vessels, and nerves are found in which of the listed sites? A. Core area B. Odontoblastic zone C. Cell free zone D. Cell rich zone

A. They decrease in size as they pass toward the dentin.

The predentin layer is formed by which of the following cells? A. fibroblast B. odontocyte C. fibrocyte D. odontoblast

D. Odontoblast

Which of the following is an age change of pulp tissue? A. increased blood supply B. increase nerve supply C. decrease of pulp tissue volume D. decrease of collagen fibers

C. The pulp volume decreases due to the continuous formation of secondary dentin.

Label.

Core area Cell rich zone Cell free zone Odontoblastic layer

The most numerous cell type of pulp tissue.

Fibroblast

Which indicates premineralized site?

1. No, the cell free zone. 2. Yes, predentin.

Which of the following best describes a pulp stone or denticle? A. unmineralized B. within blood vessel C. ectopic mineralization D. growth within nerves

C. It's mineralization occuring in an unusual site.

T/F: Blood vessels and nerves are not found in the odontoblast zone of the pulp.

False. Loops of blood vessels and nerve endings certainly are found in the odontoblastic zone among the cell bodies.

The highest percentage of the pulp's intercellualr substance is comprised of which of the following? A. hydroxyapatite B. glycosaminoglycans C. collagen D. tissue fluid

C. Collagen makes up the highest percentage of pulp's intercellular substance.

T/F: The odontoblastic cell bodies lie within the cell rich zone.

False. They lie within the odontoblastic zone located between the predentin of the dentin and the cell free zone of the pulp.

T/F: The cell free zone of the pulp lies immediatley between the odontoblastic cell bodies and mineralized dentin.

False. The cell free zone lies between the odontoblastic cell bodies and cell rich zone.

Which of the following differentiate into fibroblast? A. odontoblast B. stem cell C. lymphocyte D. macrophage

B. It's a pluopotential cell in the pulp that can become not only a fibroblast (most numerous cell of the pulp) but also an odontoblast (most predominate cell of the pulp).

Name the layers.

Top: odontoblastic Middle: cell free Bottom: cell rich

Stem cells of pulp tissue become which of the following cell types?

Odonotblasts and fibroblasts. Not lymphocytes or macrophages.

Which pulpal cells secrete collagen fibers?

Fibroblasts secrete collagen fibers of the pulp's extracellular matrix.

The pulpal cell that both forms and lysis intercellular substances is which of the following? A. macrophage B. fibroblast C. odontoblast D. stem cell

B. It forms and lysis intercellular substances. During its lysis function it is referred to as a "fibroclast."