Dental Pulp (Quiz 1)

The pulp is a ______ connective tissue.

soft

The pulp occupies the ______ of the tooth.

central portion

The pulp cavity is divided into ______ and ______.

pulp chamber, root canal

The pulp chamber is in the ______ region.

coronal

The root canal is in the ______ region.

radicular

Pulp horns extend toward the ______.

cusps

The pulp terminates at the ______.

apical foramen

The apical foramen diameter is ______ mm.

0.3-0.6

Which part contains pulp horns?

pulp chamber

Which region contains the root canal?

radicular

Lateral canals connect pulp to ______.

periodontal tissues

Lateral canals allow spread of ______.

infection

What is the clinical significance of lateral canals?

pathway for infection spread

The pulp is ______ connective tissue supporting dentin.

soft

The four zones are ______, ______, ______, ______.

odontoblastic, cell-free zone of Weil, cell-rich, pulp core

The odontogenic zone is also called ______.

odontoblastic zone

Which zone has few cells?

cell-free zone of Weil

Which zone is near odontoblasts?

odontoblastic zone

Pulp contains ______, ______, ______, ______, ______, ______.

odontoblasts, fibroblasts, ectomesenchymal cells, macrophages, T-lymphocytes, dendritic cells

Odontoblasts line the ______.

periphery of pulp

Odontoblast processes extend into ______.

dentinal tubules

Odontoblast number matches ______.

dentinal tubules

Odontoblasts move ______.

centripetally

Crown odontoblasts are ______ than root.

larger and more numerous

Odontoblast processes are found in ______.

dentinal tubules

Active odontoblasts are ______ shaped.

columnar

Active odontoblasts contain abundant ______ and ______.

RER, mitochondria

They have a prominent ______.

Golgi apparatus

Resting odontoblasts have ______ cytoplasm.

scant

Which indicates active odontoblast?

prominent Golgi

Fibroblasts are the ______ abundant pulp cells.

most

They are concentrated in the ______ zone.

cell-rich zone

Fibroblasts produce ______ and ______.

collagen, ground substance

Ectomesenchymal cells are ______.

undifferentiated

They differentiate into ______ and ______.

odontoblasts, fibroblasts

They are found in ______ and ______.

cell-rich zone, pulp core

Their number ______ with age.

decreases

Which pulp cells are stem-like?

ectomesenchymal cells

Macrophages ______.

remove dead cells

T-lymphocytes are ______.

present

B cells are ______.

scarce

Dendritic cells are ______ presenting cells.

antigen

They are similar to ______ cells.

Langerhans

They are more abundant in ______ teeth.

carious

They make up about ______% of pulp cells.

8

They are near ______ and ______.

vascular, neural structures

Function of dendritic cells?

antigen presentation

Collagen types are ______ and ______.

I, III

Collagen is densest near the ______.

apex

Ground substance contains ______, ______, ______.

GAGs, glycoproteins, water

Function of ground substance?

nutrient exchange and support

Blood comes from ______ arteries.

superior and inferior alveolar

Blood enters via ______ and ______.

apical accessory foramina

Central vessels are ______ than peripheral.

larger

Capillaries are in ______ region.

subodontoblastic

Some vessels extend into ______.

predentin

Lymphatics exit via ______.

apical foramen

Where are capillary beds?

subodontoblastic region

Pulp nerves come from ______ nerves.

superior and inferior alveolar

Large nerves are ______, smaller are ______.

central peripheral

Plexus of Raschkow is in ______ zone.

cell-free zone

It is only found in ______.

crown

Nerve fibers enter ______.

dentinal tubules

They run alongside ______.

odontoblast processes

Where is Raschkow plexus?

cell-free zone

Pulp nerves include ______ fibers from CN V.

afferent

They also include ______ fibers.

sympathetic

Pulp detects ______, ______, ______.

mechanical thermal tactile

Pain is hard to localize due to ______.

convergence

Pain stimuli include ______, ______, ______.

temperature mechanical dehydration

Why is pulp pain diffuse?

convergence

Most accepted theory is ______.

hydrodynamic theory

It involves movement of ______.

fluid in tubules

Pain is detected by ______.

plexus of Raschkow

Direct innervation theory is weak because ______.

few nerves in dentin

Odontoblast theory lacks ______.

synaptic evidence

Which theory is correct clinically?

hydrodynamic

Pulp stones are ______ masses.

calcified

They may be ______ or ______.

single multiple

True pulp stones contain ______.

dentinal tubules

False pulp stones contain ______.

no cells

Attached stones are ______ to dentin.

fused

Free stones are in ______.

pulp tissue

Embedded stones are in ______.

dentin

Pulp stones reduce ______ in pulp.

cell number

They interfere with ______.

endodontic treatment

Pulp volume ______ with age.

decreases

Cell number ______.

decreases

Cell activity ______.

decreases

Axons ______.

decrease

Sensitivity ______.

decreases

Sclerotic dentin ______.

increases

Tubule diameter ______.

decreases

Which dentin increases with age?

sclerotic dentin

Caries causes ______ dentin formation.

secondary dentin

Environmental stimuli ______ aging changes.

accelerate

Young teeth have ______ repair ability.

greater

Aging ______ repair ability.

decreases

Which teeth repair faster?

young teeth