Exam 1 Practice Flashcards
which of the following is a factor in poor response due to the pulp having severe injury
- pulp surrounded by hard unyielding walls
- pulp has poor collateral circulation
- pulp is a terminal circulation organ
not a factor: pulp has inflammatory cells present
this pulpal structure can help regulate intra pulpal presure by confining pressure increase to a limited area in the pulp
ground substance
the place where the inner enamel epithelium (IEE) and the outer enamel epithelium (OEE) meet is called
epithelium diaphragm
apical proliferation of this structure will initiate root formation
HERS
exposure of dentin to CT results in deposition of
cementum
according to your text book, lateral canals are located primariily on
apical third of root
a patient complains that when he/she eats anything cold, a sharp transient pain is felt in her front teeth. what nerve fibers are responsible for this sensation?
A-delta fibers
what is the most abundant cell of the dental pulp
fibroblast
the cell free zone of weil is mostly populated by what
capillaries and nerve fibers
NOT large blood vessels
how deep do nerve fibers penetrate into dentin
1/3 of way
proliferation of cell rests of malasezes contributes to what
formation of apical cysts
what does the textbook describe as negative pressure vessles with opening in its basement membrane and vessel walls and also contain lymphocytes but not red blood cells
lymphatic vessels
are propioceptive fibers present in dental pulp
NO
what nerve fibers are unmyleniated, slow conducting and have high threshold of excitability
C-fibers
what hard tissue is most like bone
cementum
what theory explains dentin sensitivity to hot, cold, and sweets
hydrodynamic theory
where is the terminal capillary network (TCN) located
cell free zone
according to textbook, blood vessels are [smaller of larger] than their corresponding arterioles
larger
what layer is not present on a venule
smooth
present: endothelial and outer CT layer (adventitia)
which type of collagen is found predominantly in dentin and is secreted by odontoblast
type I
what did Kakehashi demonstrate in his experiment with gnotobiotic rats
relationship between bacteria and pulpal disease
T/F: the acidity of etchants is what makes this product the most harmful to dental pulp
FALSE
what are dead tracts
an empty dentinal tubule with no odontoblastic process
according to textbook, which teeth are best able to withstand a traumatic injury (e.g., a blow to tooth)
teeth with immature (open) apices
histamine is released by what cells
mast cells
use of high speed handpiece without adequate water cooling will produce what
pulpal inflammation and dentin desiccation
DOES NOT increase pulpal blood flow
what has the potential to produce the most pain (assume there is pulpal inflammation present)
moderate size close carious lesion (no communication)
is tertiary dentin highly mineralized
NO
is cilia found on odontoblast
NO
T/F: according to textbook, most endodontic irrigants and medicaments are toxic and not biocompatible
TRUE
which of the following conditions is visible on a radiograph
a) reversible pulpitis
b) irreversible pulpties
c) pulp necrosis
none of the above
spontaneous pain and lingering pain to cold are symptoms of what condition
irreversible pulpitis
which could help determine if a tooth is vital or necrotic
response to cold
what inflammation cells would you expect to see on a pulp that has irreversible non painful pulpitis
lymphocytes, macrophages, and neutrophils
what is NOT a feature of pain increase of painful irreversible pulpitis
pain is usually localized to offending tooth
according to textbook, pulpal response to stimuli in both healthy and diseased pulps is a result of what
changes in intrapulpal pressure
what could you see if a pulp exposure occurred on a tooth with a nectrotic pulp
dry space and pus
NO BLOOD
T/F: hyperplastic pulpitis is classified as a king of irreversible pulpitis
TRUE
no response to cold on a tooth with visible pulp space is indicative of
pulpal necrosis
Howships lacunae are found in what condition
internal resorption
the pulapl response to cold on a tooth w/ calcific metamorphosis would be similar to that of a tooth with what
pulpal necrosis
according to textbook, what is not see in calcific metamorphosis
complete histologic obliteration
a sharp transient pain senation to cold that quickly disappears is related to
reversible pulpitis
T/F: a normal pulp would be non responsive to hot or cold
FALSE
this condition containts multinucleated giant cells
internal resorption
T/F: clinical symptoms directly correlate w/ histologic changes in the pulp
FALSE
which is not found in hyperplastic pulpitis histology
nerve fibers
increases in intrapulpal pressure will eventually result in
collapse of lymphatic vessels, collapse of venules, and pulpal necrosis
T/F: internal resorption is usually identified by its radiographic appearance
TRUE
debridement of root canal can be [mechanical OR chemical]
BOTH
the dental papilla gives origin to what structures
pulp and dentin
the pulp tissue is considered to be what type of CT
LCT
nervous plexus of Rashkow is most closely associated with what zone
cell rich zone
from center of pulp towards dentin, list the order in which zones of pulp are arranged
core -> cell rich zone -> cell free zone -> odontoblastic layer
the cell rich zone is mostly composed of what
undiferrentiated mesenchymal cells and fibroblasts
is collagen made of polypeptide chains
yes
do odontoblasts produce both type I and III collagen?
NO - just type I
are immature collagen fibers referred to as reticular fibers
YES
what is the matrix for pulp’s ground substance secreted by
fibroblasts
do nerve fibers penetrate all the way into the DEJ?
NO. absent in outer 1/3
is there an increase in cellular components of the pulp in aging pulp?
NO!!!
what is the principal etiology of pulpal disease
microbial
prostaglandins are deriatives of what substance
arachidonic acid
in regards to restorations, which is the most harmful to pulp
microleakage allowed
what precautions should be taken to protect the pulp during operative procedures
- use of water coolant
- light intermittent pressure
- good cavity prep design
what is the minimal dentin thickness that protects the pulp from most irritants
2 mm
what is present only in pulp chamber
pulp stone
what is an incomplete calcification in root canal
diffuse calcification
what is an extensive calcification of pulp space
calcific metamorphosis
what is usually associated with periapical lesions
pulpal necrosis
what is the most abundant cell in the pulp
fibroblast
what replaces damaged odontoblasats
undifferentiated mesenchymal cells
what are tall columnar cells
odontoblast
T/F: the young dental papilla is richly innervated with sensory fibers
FALSE
T/F: odontoblasts do not differentiate until after ameloblasts differentiate
TRUE
T/F: rupture of HERS before dentin is formed results in formation of lateral canal
TRUE
T/F: the apical CDJ is the narrowest part of canal
TRUE
T/F: the pulp does not contain any lymphatic vesseld
FALSE
T/F: arterioles enter the pulp thru apical foramen known as EFFERENT blood vessels
FALSE
T/F: the diameter and density of dentinal tubules increase as depth of preparation increase
TRUE
T/F: scientific evidence shows that bacteria will only grow underneath a restoration in the presence of microleakage
TRUE
