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A set of multiple choice questions and answers related to orofacial anatomy. It covers various aspects of the subject, including tooth structure, development, eruption, and related anatomical features. The questions are designed to test understanding of key concepts and terminology in orofacial anatomy.
Typology: Exams
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the lateral margin of the external nose is known as an ala
a. true b. false a. true
under normal circumstances, sinuses are filled with
a. bones of the cranium b. blood c. air d. fluid
c. air
Development of a cleft palate occurs between the 7th and the 11th week. If it occurs early, only the soft palate or uvula will be affected.
a. Both statements are false. b. Both statements are true. c. The first statement is true; the second statement is false. d. The first statement is false; the second statement is true. c. the first statement is true; the second statement is false
which of the following indicates occlusal trauma?
a. pointed (or pyramidal-shaped) inter proximal alveolar bone b. sharpey's fibers in the alveolar bone c. a layer of spongy bone d. a thickened lamina dura d. thickened lamina dura
Each of the following is a common result of occlusal trauma EXCEPT for one. Which one is the EXCEPTION?
c. short, fused roots d. bifurcated roots a. a sharp bend in the root
Teeth with curved roots afford resistance to apical and distal forces but are vulnerable to occlusal forces. Roots with triangular cross section are particularly vulnerable to lateral displacement.
a. Both statements are true. b. Both statements are false. c. The first statement is true; the second statement is false. d. The first statement is false; the second statement is true. b. Both statements are false
Root pain always means that dental caries is present.
a. true b. false b. false
Root pain due to exposed dentin is caused by gingival recession. Exposed spots of dentin can stimulate pulpal nerves through the cementoenamel junction (CEJ).
a. Both statements are false. b. The first statement is false; the second statement is true. c. The first statement is true; the second statement is false. d. Both statements are true. c. the first statement is true; the second statement is false
Following mild trauma, which type of dentin is formed? a. Reparative b. Secondary c. Interglobular d. Sclerotic a. Reparative
Each of the following is a characteristic of the periodontal ligament EXPECT one. Which one is the Exception?
a. Capable of compression
b. Capable of regeneration
c. Provides tension
a. Maxillary second premolar
b. Mandibular second molar
c. Maxillary first premolar
d. Mandibular first molar
a. Maxillary second premolar
An ideal situation is to have all teeth occlude equally on closure of the jaw because this pattern allows dissipation of occlusal forces over all of teeth.
a. The statement is NOT correct, but the reason is correct. b. The statement is correct, but the reason is NOT correct. c. NEITHER the statement NOR the reason is correct. d. Both the statement and the reason are correct but are NOT related. e. Both the statement and the reason are correct and related. e. Both the statement and the reason are correct and related. During hypercementosis, excess cementum is deposited
a. irregularly, throughout the root surface
b. at the dentinocemental junction c. at the apex of the root d. along the CEJ c. at the apex of the root Each of the following structures is covered in masticatory mucosa EXCEPT one. Which one is the EXCEPTION?
a. Soft palate
b. Mandibular lingual gingiva
c. Hard palate
d. Maxillary labial gingiva
a. soft palate Each of the following has a role in trapping contaminants that enter the nasal cavity EXCEPT one. Which one is the EXCEPTION?
a. Cilia
b. Mucous
c. The first statement is false; the second statement is true. d. Both statements are false a. The first statement is true; the second statement is false. the stomodeum forms the oral cavity and the oral pharynx
a. true b. false a. true In attached gingiva, the junction of the epithelium and the connective tissue are tightly bound because ridges and pegs of connective tissue project up into the epithelium.
a. The statement is correct, but the reason is NOT correct. b. NEITHER the statement NOR the reason is correct. c. Both the statement and the reason are correct and related. d. Both the statement and the reason are correct but are NOT related. e. The statement is NOT correct, but the reason is correct. c. Both the statement and the reason are correct and related. Fordyce granules normally function as
a. sebaceous glands b. taste buds
c. an infectious viral illness d. a characteristic of a malignancy a. sebaceous glands The respiratory epithelium in the roof of the nasal cavity, upper surfaces of both the superior concha, and nasal septum is modified. This tissue has nerve fibers that can perceive odors.
a. Both statements are false. b. The first statement is false; the second statement is true. c. The first statement is true; the second statement is false. d. Both statements are true. d. both statements are true The mandibular fossa is located on the
a. anterior medial surface of the condyle b. posterior superior surface of the condyle c. inferior surface of the temporal bone d. posterior surface of the temporal bone c. inferior surface of the temporal bone The outermost part of the structure of the cap stage is the outer enamel epithelium (OEE). This tissue, a continuation of the basal layer of oral epithelium, is composed of predominately pyramidal and conical-shaped cells.
b. The cementum overlaps enamel. c. The cementum and enamel do not meet, exposing a portion of dentin. d. Cementum meets enamel at a definite point or junction. b. The cementum overlaps enamel The cells of the outer enamel epithelium (OEE) are indirectly responsible for enamel formation because they elongate and become ameloblasts.
a. NEITHER the statement NOR the reason is correct. b. The statement is correct, but the reason is NOT correct. c. The statement is NOT correct, but the reason is correct. d. Both the statement and the reason are correct and related. e. Both the statement and the reason are correct but are NOT related. a. NEITHER the statement NOR the reason is correct. The cap stage begins when the concavity of the tooth buds become slightly concave
a. true b. false a. true An ankylosed deciduous tooth will prevent the eruption of a permanent tooth because the alveolar crest of bone fuses in the cervical area with dentin of a resorbing root.
a. NEITHER the statement NOR the reason is correct. b. The statement is NOT correct, but the reason is correct. c. Both the statement and the reason are correct and related. d. The statement is correct, but the reason is NOT correct. e. Both the statement and the reason are correct but are NOT related. d. The statement is correct, but the reason is NOT correct. Each of the following has a role in tooth eruption EXCEPT for one. Which one is the EXCEPTION?
a. Alveolar bone
b. Periodontal ligament
c. Vascular pressures
d. All have a role in tooth eruption
e. Root elongation
d. All have a role in tooth eruption The crescent-shaped groove within the middle nasal concha is the
a. true b. false b. false The mucosa that responds to constant trauma from chewing by becoming thick and keratinized in a line corresponding to the occlusal surfaces of teeth is the
a. lip b. tongue c. soft palate d. buccal d. buccal in a young adult, the maxillary sinus generally lies between the maxillary canine and the _________________
a. second molar b. first molar c. third molar d. premolars c. third molar Healthy gingiva is usually
a. smooth b. glossy c. slightly blunted d. stippled e. All of the above d. stippled Each of the following is true of the cells of the inner enamel epithelium (IEE) during the bell stage EXCEPT one. Which one is the EXCEPTION?
a. There is a decrease in mitochondria.
b. The cells increase in length.
c. Their organelles increase.
d. The cells prepare to become secretory cells
a. there is a decrease in mitochondria Each of the following is a common result of occlusal trauma EXCEPT for one. Which one is the EXCEPTION?
a. Tighter contact areas
d. The statement is correct, but the reason is NOT correct. e. Both the statement and the reason are correct but are NOT related. a. Both the statement and the reason are correct and related. The primary tooth is able to erupt because the gubernacular canal breaks down bone between the tooth and the surface oral epithelium.
a. Both the statement and the reason are correct but are NOT related. b. NEITHER the statement NOR the reason is correct. c. Both the statement and the reason are correct and related. d. The statement is NOT correct, but the reason is correct. e. The statement is correct, but the reason is NOT correct. c. both the statement and the reason are correct and related Each of the following teeth frequently has two roots EXCEPT one. Which one is the EXCEPTION?
a. Mandibular second molar
b. Maxillary second premolar
c. Maxillary first premolar
d. Mandibular first molar
b. Maxillary second premolar The canines are LEAST likely of all permanent teeth to be congenitally missing because unlike other permanent teeth, canines begin to calcify by about the fourth of fifth month of fetal life.
a. The statement is correct, but the reason is NOT correct.
b. Both the statement and the reason are correct but are NOT related.
c. Both the statement and the reason are correct and related.
d. NEITHER the statement NOR the reason is correct.
e. The statement is NOT correct, but the reason is correct.
a. The statement is correct, but the reason is NOT correct. Each of the following is true of the buccopharyngeal membrane EXCEPT one. Which one is the EXCEPTION?
a. The buccopharyngeal membrane forms the descending and sigmoid colon. b. The buccopharyngeal membrane is the point where the foregut and stomodeum share a common wall.
