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 this process, 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
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 this process, 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
