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Perio TEST 1 CNIH Exam 2024/2025 Questions With Completed & Verified Solutions.
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Perio TEST 1 CNIH Exam 2024/2025 Questions With Completed & Verified Solutions.
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Perio TEST # 1 CNIH1st layer of alveolar process - ANS Thin layer of bone that lines the socket and surrounds roots.
Has numerous holes to allow blood vessels from cancellous bone to connect with vessels of the
PDL.
-PDL fibers are embedded.
-no periosteum.
Trabecular/cancellous bone - ANS 2nd layer of alveolar process.
Spongy, lattice-like bone filler between the cortical bone and alveolar bone proper.
oriented around the tooth to form support for alveolar bone proper
Specialized Mucosa - ANS Covers the dorsal surface of the tongue.
Lining (alveolar) Mucosa - ANS Loosely attached to underlying structures and covered with
non-keratinized epithelium.
-From mucogingival junction to mucous membrane of lips, cheeks, floor of the mouth, soft
palate.
C. Masticatory Mucosa - ANS Firmly attached to underlying bone and root and covered with
parakeratinized or keratinized epithelium.
-withstands frictional forces-toothbrushing/ chewing.
-includes gingiva and hard palate.
Parakeratinzed - ANS an epithelium in which the superficial cells have not lost their nuclei, but
have become filled with keratin.
Keratinized - ANS Keratin is a protein and the major component in skin, hair and nails.
Periodontium - ANS the functional system of tissues that surround teeth and attaches them to
sockets.
What are four components (tissues) to the periodontium? - ANS Gingiva, cementum, alveolar
bone, and periodontal ligament (PDL)
Gingiva - ANS surrounds cervical portion & covers alveolar process.
-composed of a thin outer layer of epithelium and underlying of connective tissue.
four anatomical areas of the gingiva - ANS Free Gingiva,
Gingival sulcus,
Interdental Gingiva, Attached gingiva.
, Function of gingiva - ANS Protects underlying tooth-supporting structures from oral
environment. Temp. changes, mechanical forces, bacteria.
-provides a tissue seal around cervical portion.
-Covers alveolar process of jaws.
Demarcations of the gingiva - ANS Free gingival margin, free gingival groove, mucogingival
junction
Free Gingival Margin - ANS Coronal most limit of gingiva
Free Gingival groove(line) - ANS shallow linear depression that separates free & attached
gingiva.
(May of may not be visible clinically)
Mucogingival junction (MGJ) - ANS Clinically visible boundary where pink attached gingival
meets red, shiny alveolar mucosa.
Boundaries of gingiva - ANS Coronal- FGM
Apical- MGJ
Acellular cementum - ANS Primarily responsible for attaching tooth to bone.
-no living cells
-first to be formed, no new acellular during life.
-Covers cervical 1/3 or half root.
-sharpey's fibers make p most of the structure.
Cellular Cementum - ANS Contains cementoblasts and fibroblasts.
-formed after tooth erupts, increases with age.
- less calcified.
-deposited in intervals on apical half of root.
Cementum characteristics - ANS Functions: give attachment to collagen fibers of the PDL,
protects the dentin, seals and covers open dentinal tubules, formation at apical area can
compensate for attrition/incisal wear.
CEJ has three relationships. O.M.G. what are they? - ANS Overlap-60% cementum overlaps the
enamel
Meet- 30% cementum meets the enamel
Gap- 10% small gap between the cementum and enamel.
What are the 3 layers of the alveolar process? - ANS Alveolar bone proper, cortical bone,
cancellous bone.
(One layer of soft tissue)
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