30 Questions
Which part of the periodontium directly protects the underlying tissues?
Gingivae
What are the tissues included in the periodontium?
Gingivae, periodontal ligament, cementum, and alveolar bone
What is the depth range of the gingival sulcus in health around a fully erupted tooth?
Between 0.5 and 3 mm
What type of oral epithelium appears paler pink in the gingivae?
Keratinised epithelium
Which one of these is NOT a function of gingival fibers?
Supporting blood supply to the tooth
Where is the gingival margin usually located in a healthy mouth?
Coronal to the cement-enamel junction
What are the anatomical divisions of the gingivae?
Marginal, attached, and interdental areas
Which part of the periodontium serves as support for the fibers of the periodontal ligament?
Cementum and alveolar bone
In certain ethnic groups, what is a characteristic feature of the gingivae?
Pigmentation
What is the appearance of healthy gingivae?
Pink and firm with a knife-edge appearance
What is the primary function of cementum?
To form the outer covering of the anatomic root
What is the width range of the periodontal ligament?
0.15 to 0.38 mm
Which constituent is NOT part of the periodontal ligament?
Enamel
Which is a type of cementum classified by location?
Radicular cementum
Where is acellular cementum primarily found on the tooth?
Cervical third of the root
What are glycosaminoglycans a part of within the periodontal ligament?
Ground substances
When is cellular cementum formed?
After the tooth reaches the occlusal plane
What is the alveolar bone primarily responsible for?
Supporting the tooth sockets
Which element is not included in the attachment apparatus of the teeth?
Enamel
Which of the following is a function of cementum?
Maintaining teeth in functional occlusion
What is the main function of the jaw bones?
To distribute and reabsorb forces generated by mastication and other tooth contact
What is the portion of the jaw bone located apically but unrelated to the teeth?
Basal bone
What is the thin lamella of bone that surrounds the root of the tooth?
Alveolar bone proper
What is the function of the cortical plates?
To form the outer and inner plates of the alveolar bone
What is the term for the denuded areas that extend through the marginal bone?
Dehiscence
What is the term for the isolated areas in which the root is denuded of bone and marginal bone is intact?
Fenestration
What is the term for the bone that fills the area between the cortical plates and alveolar bone proper?
Spongy bone
What is the effect of the teeth being in extreme buccal or lingual version on the alveolar process?
It makes the alveolar process extremely thin or missing on that side of the teeth
What is the term for the bone that surrounds the alveolar bone proper and gives support to the socket?
Supporting alveolar bone
What is the term for the fibers that attach to the alveolar bone proper?
Principal fibers
This quiz covers the structure and function of the periodontium, including the gingivae, periodontal ligament, cementum, and alveolar bone.
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