TEST BANK OF ENDODONTICS PRINCIPLES AND
PRACTICE 6th EDITION by Mahmoud Torabinejad and
Ashraf F. Fouad
,TEST BANK OF ENDODONTICS PRINCIPLES AND PRACTICE
6th EDITION
1. Which of the following is a condition that can be described as irreversible pathosis of
the pulp:
a. Dentin hypersensitivity
b. Pulp canal obliteration (total calcification)
c. Internal resorption
d. Sharp, brief pain with thermal changes
2. The following inflammatory mediator(s) is/are not elevated in the pulp, in cases with
symptomatic irreversible pulpitis:
a. Prostaglandins
b. Leukotrienes
c. Bradykinin
d. Neuropeptides
e. Matrix metalloproteinases
Explain:
● Symptomatic irreversible pulpitis is a condition where the pulp tissue in
the tooth is inflamed and cannot heal, resulting in persistent pain and
sensitivity. Several inflammatory mediators are involved in thisprocess,
including prostaglandins (option a), bradykinin (option c), neuropeptides
(option d), and matrix metalloproteinases (option e). These mediators can
cause pain, swelling, and tissue damage.
● Leukotrienes are lipid mediators involved in the inflammatory response,
but they are not typically elevated in cases of symptomatic irreversible
pulpitis. Instead, they are more commonly associated with other
inflammatory conditions, such as asthma and allergies.
3. The following cytokine acts to control the expansion of periapical lesions:
a. IL-1
b. IL-8
c. IL-10
d. TNF-alpha
e. IL-17
, Explain:
● Periapical lesions are areas of bone destruction around the apex of a
tooth, often resulting from an infection or inflammation of the dental pulp.
These lesions can expand and cause significant damage to the surrounding
bone and tissue.
● IL-10 is an anti-inflammatory cytokine that helps to regulate the
immune response and prevent excessive inflammation. Studies have shown
that IL-10 can play a key role in controlling the expansion of periapical
lesions by inhibiting the production of pro-inflammatory cytokines and
reducing tissue damage.
● IL-1 (option a) and TNF-alpha (option d) are pro-inflammatory cytokines
that can contribute to the development and progression of periapical lesions.
IL-8 (option b) is a chemokine that attracts immune cells to the site of
infection or inflammation. IL-17 (option e) is a pro-inflammatory cytokine that
plays a role in the immune response to bacterial and fungal infection
4. Root canal infections are best described as:
a. Single-species biofilms, predominantly microorganisms
b. Single-species biofilms, predominantly extracellular matrix
c. Multispecies biofilms, within an extracellular matrix, predominantly
microorganisms
d. Multispecies biofilms, within an extracellular matrix, predominantly Matrix
Explain:
● Biofilms are complex communities of microorganisms that adhere to
surfaces and are embedded in an extracellular matrix. Dental biofilms can
form in various oral niches, including the surface of teeth, the gingival
sulcus, and the root canal system.
● Root canal infections are typically caused by bacteria that enter the
pulp chamber through caries, fractures, or other sources of infection. Once
inside, the bacteria form multispecies biofilms that adhere to the root canal
walls and are embedded in an extracellular matrix composed of host-
derived components and bacterial exopolysaccharides.
● The bacteria in root canal biofilms are predominantly microorganisms, but
the extracellular matrix also plays an important role in the formation
and persistence of the biofilm. The extracellular matrix can protect the
bacteria
PRACTICE 6th EDITION by Mahmoud Torabinejad and
Ashraf F. Fouad
,TEST BANK OF ENDODONTICS PRINCIPLES AND PRACTICE
6th EDITION
1. Which of the following is a condition that can be described as irreversible pathosis of
the pulp:
a. Dentin hypersensitivity
b. Pulp canal obliteration (total calcification)
c. Internal resorption
d. Sharp, brief pain with thermal changes
2. The following inflammatory mediator(s) is/are not elevated in the pulp, in cases with
symptomatic irreversible pulpitis:
a. Prostaglandins
b. Leukotrienes
c. Bradykinin
d. Neuropeptides
e. Matrix metalloproteinases
Explain:
● Symptomatic irreversible pulpitis is a condition where the pulp tissue in
the tooth is inflamed and cannot heal, resulting in persistent pain and
sensitivity. Several inflammatory mediators are involved in thisprocess,
including prostaglandins (option a), bradykinin (option c), neuropeptides
(option d), and matrix metalloproteinases (option e). These mediators can
cause pain, swelling, and tissue damage.
● Leukotrienes are lipid mediators involved in the inflammatory response,
but they are not typically elevated in cases of symptomatic irreversible
pulpitis. Instead, they are more commonly associated with other
inflammatory conditions, such as asthma and allergies.
3. The following cytokine acts to control the expansion of periapical lesions:
a. IL-1
b. IL-8
c. IL-10
d. TNF-alpha
e. IL-17
, Explain:
● Periapical lesions are areas of bone destruction around the apex of a
tooth, often resulting from an infection or inflammation of the dental pulp.
These lesions can expand and cause significant damage to the surrounding
bone and tissue.
● IL-10 is an anti-inflammatory cytokine that helps to regulate the
immune response and prevent excessive inflammation. Studies have shown
that IL-10 can play a key role in controlling the expansion of periapical
lesions by inhibiting the production of pro-inflammatory cytokines and
reducing tissue damage.
● IL-1 (option a) and TNF-alpha (option d) are pro-inflammatory cytokines
that can contribute to the development and progression of periapical lesions.
IL-8 (option b) is a chemokine that attracts immune cells to the site of
infection or inflammation. IL-17 (option e) is a pro-inflammatory cytokine that
plays a role in the immune response to bacterial and fungal infection
4. Root canal infections are best described as:
a. Single-species biofilms, predominantly microorganisms
b. Single-species biofilms, predominantly extracellular matrix
c. Multispecies biofilms, within an extracellular matrix, predominantly
microorganisms
d. Multispecies biofilms, within an extracellular matrix, predominantly Matrix
Explain:
● Biofilms are complex communities of microorganisms that adhere to
surfaces and are embedded in an extracellular matrix. Dental biofilms can
form in various oral niches, including the surface of teeth, the gingival
sulcus, and the root canal system.
● Root canal infections are typically caused by bacteria that enter the
pulp chamber through caries, fractures, or other sources of infection. Once
inside, the bacteria form multispecies biofilms that adhere to the root canal
walls and are embedded in an extracellular matrix composed of host-
derived components and bacterial exopolysaccharides.
● The bacteria in root canal biofilms are predominantly microorganisms, but
the extracellular matrix also plays an important role in the formation
and persistence of the biofilm. The extracellular matrix can protect the
bacteria
