©BRIGHTSTARS EXAM SOLUTIONS
11/16/2024 10:16 AM
DH244 Final Exam Questions With Correct
Answers
What are the 4 tissues of the periodontium? - answer✔gingiva, cementum, periodontal
ligament, alveolar bone
When looking at the attached gingiva, list some specifics of this tissue....where located,
where widest, etc. - answer✔Between the MGJ and free gingiva; attached to bone
Widest in incisor/molar region, narrowest in premolar region
List specific characteristics of cementum, PDL and bone - answer✔- Cementum covers the root
surface, mineralized CT, gives attachment to PDL collagen fibers, protects underlying dentin,
avascular
- PDL covers the root and attaches it to the bone, composed of fiber bundles attaching to the
cementum on one side and alveolar bone on the other, soft CT
- Alveolar bone is mineralized CT, forms the sockets that provide support and protection for the
roots, its dependent on the presence of teeth
Know the locations of the oral epithelium, the sulcular epithelium and the junctional
epithelium - answer✔OE - covers the free and attached gingiva, faces oral cavity
SE - lines the sulcus, faces the tooth surface
JE - located at the base of the sulcus, attaches gingiva to tooth
When studying periodontology, why is the junctional epithelium important? - answer✔It's a
protective barrier between biofilm and the CT
1|Page
, ©BRIGHTSTARS EXAM SOLUTIONS
11/16/2024 10:16 AM
Differentiate between epithelial cells versus connective tissue cells of the periodontium. -
answer✔- CT fills the spaces between the tissues and organs; fibroblasts, macrophages,
neutrophils, lymphocytes; cementum, dentin, alveolar bone, pulp are specialized forms of CT
- Epithelial tissue makes up the outer surface of the body, lines body cavities; avascular, receive
their oxygen/nutrients from underlying CT
Be able to identify fibers of the gingival fiber bundle versus fibers of the PDL -
answer✔*Gingival Fiber Bundles *
Circlular
Intercircular
Alveologingival
Interpapillary
Dentogingival
Transgingival
PG, TS, IG
*PDL Fibers*
Alveolar Crest
Horizontal
Interradicular
Oblique
Apical
What are the three relationships that cementum may have with the enamel surface of the
tooth crown? - answer✔O - overlap 60%
M - meet 30%
G - gap 10%
2|Page
, ©BRIGHTSTARS EXAM SOLUTIONS
11/16/2024 10:16 AM
What are the differences between gingivitis and periodontitis on a histologic level? -
answer✔*Gingivitis*
JE at CEJ
Supragingival fiber destruction
Bone intact
PDL intact
*Periodontitis*
JE on cementum
Supragingival fiber destruction
Bone destruction
PDL destruction
Rete pegs will be present at early stage of gingivitis
What are the characteristics of the alveolar bone in health, gingivitis, and periodontitis? -
answer✔Health - crest is located ~ 2mm apical the CEJ
Gingivitis - crest is located ~ 2mm apical the CEJ
Periodontitis - crest is located
What is horizontal bone loss? - answer✔Most common, fairly even overall reduction in bone
height
What is vertical bone loss? - answer✔Angular, localized
Uneven reduction in bone height, more rapid progression on bone loss, leaves a trench like
area of missing bone, infrabony defect
Identify which fiber is regenerated continuously, even in the presence of severe clinical
attachment loss? - answer✔Transseptal
What is an infrabony pocket and how are they classified? - answer✔Vertical bone loss
Occurs when there is bone loss, JE is apical to the crest of the alveolar bone
3|Page
11/16/2024 10:16 AM
DH244 Final Exam Questions With Correct
Answers
What are the 4 tissues of the periodontium? - answer✔gingiva, cementum, periodontal
ligament, alveolar bone
When looking at the attached gingiva, list some specifics of this tissue....where located,
where widest, etc. - answer✔Between the MGJ and free gingiva; attached to bone
Widest in incisor/molar region, narrowest in premolar region
List specific characteristics of cementum, PDL and bone - answer✔- Cementum covers the root
surface, mineralized CT, gives attachment to PDL collagen fibers, protects underlying dentin,
avascular
- PDL covers the root and attaches it to the bone, composed of fiber bundles attaching to the
cementum on one side and alveolar bone on the other, soft CT
- Alveolar bone is mineralized CT, forms the sockets that provide support and protection for the
roots, its dependent on the presence of teeth
Know the locations of the oral epithelium, the sulcular epithelium and the junctional
epithelium - answer✔OE - covers the free and attached gingiva, faces oral cavity
SE - lines the sulcus, faces the tooth surface
JE - located at the base of the sulcus, attaches gingiva to tooth
When studying periodontology, why is the junctional epithelium important? - answer✔It's a
protective barrier between biofilm and the CT
1|Page
, ©BRIGHTSTARS EXAM SOLUTIONS
11/16/2024 10:16 AM
Differentiate between epithelial cells versus connective tissue cells of the periodontium. -
answer✔- CT fills the spaces between the tissues and organs; fibroblasts, macrophages,
neutrophils, lymphocytes; cementum, dentin, alveolar bone, pulp are specialized forms of CT
- Epithelial tissue makes up the outer surface of the body, lines body cavities; avascular, receive
their oxygen/nutrients from underlying CT
Be able to identify fibers of the gingival fiber bundle versus fibers of the PDL -
answer✔*Gingival Fiber Bundles *
Circlular
Intercircular
Alveologingival
Interpapillary
Dentogingival
Transgingival
PG, TS, IG
*PDL Fibers*
Alveolar Crest
Horizontal
Interradicular
Oblique
Apical
What are the three relationships that cementum may have with the enamel surface of the
tooth crown? - answer✔O - overlap 60%
M - meet 30%
G - gap 10%
2|Page
, ©BRIGHTSTARS EXAM SOLUTIONS
11/16/2024 10:16 AM
What are the differences between gingivitis and periodontitis on a histologic level? -
answer✔*Gingivitis*
JE at CEJ
Supragingival fiber destruction
Bone intact
PDL intact
*Periodontitis*
JE on cementum
Supragingival fiber destruction
Bone destruction
PDL destruction
Rete pegs will be present at early stage of gingivitis
What are the characteristics of the alveolar bone in health, gingivitis, and periodontitis? -
answer✔Health - crest is located ~ 2mm apical the CEJ
Gingivitis - crest is located ~ 2mm apical the CEJ
Periodontitis - crest is located
What is horizontal bone loss? - answer✔Most common, fairly even overall reduction in bone
height
What is vertical bone loss? - answer✔Angular, localized
Uneven reduction in bone height, more rapid progression on bone loss, leaves a trench like
area of missing bone, infrabony defect
Identify which fiber is regenerated continuously, even in the presence of severe clinical
attachment loss? - answer✔Transseptal
What is an infrabony pocket and how are they classified? - answer✔Vertical bone loss
Occurs when there is bone loss, JE is apical to the crest of the alveolar bone
3|Page
