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Questions and Answers
What anatomical structure does the pterygomandibular raphé serve as a junction between?
Why is it important to understand the normal features of the tongue?
What is the function of the buccal frenum in denture construction?
What area of the lower denture is influenced by the masseter muscle?
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What structures form the boundaries of the lingual pouch?
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What effect does excessive resorption of the mandible have on the sublingual salivary gland?
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What role does the tongue play in the construction of a mandibular denture?
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Which of the following structures is specifically associated with the buccinator muscle in relation to mandibular denture construction?
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What anatomical feature underlies the pterygomandibular fold?
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Which structure is involved in arranging the teeth on the mandibular denture?
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What is the primary function of the buccal shelf of bone in the mandible?
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Where is the mental foramen located?
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What is a characteristic of the genial tubercles?
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Which structure extends downward and forward from the third molar area on the mandible's internal surface?
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What is the role of the torus mandibularis?
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Which statement about the external oblique ridge is correct?
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What anatomical feature contains mucous glands and lies at the posterior end of the lower ridge?
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What effect does resorption have on the mental foramen over time?
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What is found within the retromolar pad area?
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How is the fibrous connective tissue covering the alveolar ridge characterized?
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Study Notes
Anatomy of the Mandible
- The mandible is the lower jawbone.
- It supports the lower teeth.
- The mandible is made up of a body and two rami.
- The body of the mandible is the horizontal portion.
- The rami are the vertical portions.
Supporting Structures
- Fibrous connective tissue covering alveolar ridge: Covers the crest of the lower ridge; Thin, not firmly attached, especially on the lower ridge.
- External Oblique Ridge: Extends upwards and backwards on the external surface of the body of the mandible from the mental foramen along the anterior border of the Ramus.
- Buccal Shelf of Bone: Area bound medially by the residual ridge and laterally by the external oblique ridge; A primary stress-bearing area.
- Mental Foramen: Located on the external surface of the body of the mandible between the roots of the premolars; Transmits the mental nerve and vessels that supply the chin.
- Mylohyoid Ridge: Also known as the "Internal Oblique Ridge"; Extends downward and forward from the 3rd molar area on the inner surface of the body of the mandible; Attachment for the mylohyoid muscle.
- Torus Mandibularis: Benign bony growth on the lingual aspect of the mandible.
- Genial Tubercles: Located on the inner surface of the mandible in the symphysis region; May be located on the crest of the ridge in cases of extreme bone resorption.
- Retromolar Pad: Pear-shaped area of mucous membrane at the posterior end of the lower ridge, anterior to the pterygo-mandibular raphé; Contains mucous glands, the temporalis tendon, and fibers of the buccinator and superior constrictor muscles.
- Tongue: Located in the floor of the mouth; Important for deglutition (swallowing) and speech
Limiting Structures of the Lower Denture
- Frena: Folds of mucous membrane that attach to the lips and cheeks.
- Vestibules: Spaces between the cheeks and teeth.
- Buccal Frenum: Folds of mucous membrane in the premolar area that attach to the lips and cheeks.
- Buccal Vestibule: Space between the cheeks and teeth.
- Masseter Muscle: Related to the distobuccal corner of the lower denture; A strong muscle of mastication that can displace the denture.
- Distolingual Area: Space posterior to the last natural tooth.
- Lingual Pouch: Space bounded by the palatoglossus, mylohyoid, and medial pterygoid muscles.
- Sublingual Gland Area: The area where the sublingual salivary gland is located.
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Description
This quiz covers important aspects of the mandible, the lower jawbone. Explore its structural components, supporting structures, and their functions. Understand key terms such as the body, rami, mental foramen, and more.
