Introduction to Dentistry Practice Questions
Course Introduction
Introduction to Dentistry provides students with a comprehensive overview of the dental profession, exploring its history, ethical foundations, and the various specialties within the field. This course introduces fundamental concepts such as oral anatomy, dental terminology, preventative care, patient communication, and the role of dentistry in overall health. Students will also gain insight into the daily responsibilities of dental professionals, advancements in dental technologies, and the importance of interdisciplinary collaboration in providing holistic patient care.
Recommended Textbook
Illustrated Dental Embryology Histology and Anatomy 4th Edition by Margaret J. Fehrenbach
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Page 2
Chapter 1: Face and Neck Regions
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Q1) The _____ extends from just below the lateral margin of the eye toward the middle part of the external ear.
A) temporomandibular joint
B) zygomatic arch
C) labial commissure
D) infraorbital region
Answer: B
Q2) Which of the following may be involved in the disruption of the vermilion zone and may make it hard to determine the exact location of its mucocutaneous junction between the lips and the surrounding skin?
A) Scar tissue
B) Hypercalcification
C) Cleft palate
D) Symmetry
Answer: A
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Chapter 2: Oral Cavity and Pharynx
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Q1) Surrounding the teeth in the alveoli and covering the alveolar processes is the _____,which is composed of a firm pink tissue.
A) gingiva
B) minor salivary glands
C) Fordyce spots
D) linea alba
Answer: A
Q2) Each body of the maxilla is superior to the teeth and contains the _____ sinuses.
A) sphenoidal
B) ethmoidal
C) frontal
D) maxillary
Answer: D
Q3) The outermost layer of the root is composed of:
A) cementum.
B) pulp.
C) dentin.
D) enamel.
Answer: A
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Page 4
Chapter 3: Prenatal Development
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Q1) How many X-type chromosomes are necessary for the embryo to become of the female gender when present during prenatal development?
A) One
B) Two
C) Three
D) Four
Answer: B
Q2) Which of the following tissues listed will develop from the ectoderm layer of the embryo during prenatal development?
A) Epidermis
B) Liver
C) Muscle
D) Dermis
Answer: A
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Chapter 4: Face and Neck Development
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Q1) The _____ are rounded areas of specialized,thickened ectoderm found at the location of developing special sense organs.
A) placodes
B) branchial arches
C) branchial pouches
D) processes
Q2) From which structure during prenatal development is the palatine tonsillar tissue derived?
A) First branchial arches
B) First pharyngeal pouches
C) Second branchial arches
D) Second pharyngeal pouches
Q3) Which of the following is not part of the developing branchial apparatus during cervical development?
A) Branchial arches
B) Branchial grooves
C) Pharyngeal pouches
D) Branchial cleft cysts
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6
Chapter 5: Orofacial Development
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Q1) During tongue development,what does the epiglottic swelling develop from?
A) Outer parts of the maxillary process
B) Inferior growth of the intermaxillary segment
C) Palatal shelves of the maxillary process
D) First four branchial arches
Q2) Which of the following statements concerning tongue development is correct?
A) Tongue development begins as a triangular median swelling, the tuberculum impar.
B) The copula is formed from the fusion of mesenchyme of mainly the second parts of the fourth branchial arches.
C) The foramen cecum is the beginning of the thymus.
D) The tongue develops during the eighth week of prenatal development.
Q3) The intermaxillary segment is an internal wedge-shaped mass that extends inferiorly and deep to the nasal pits on the:
A) inside of the parotid salivary gland.
B) inside of the stomodeum.
C) wall of the pharynx.
D) wall of the maxillary sinus.
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Page 7
Chapter 6: Tooth Development and Eruption
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Q1) Which of the following embryonic structures becomes the dentinoenamel junction during completion of tooth development?
A) Inner cells of the dental papilla
B) Outer cells of the dental papilla
C) Outer enamel epithelium of the enamel organ
D) Basement membrane between the enamel organ and dental papilla
Q2) What happens to the specific cells from the enamel organ that will differentiate into preameloblasts?
A) Their length shortens.
B) Their nuclei repolarize.
C) Their cellular contents mineralize.
D) They line up along the basement membrane.
Q3) Nonsuccedaneous permanent teeth develop from buds that grow off an extension of:
A) each successional dental lamina.
B) both paired palatal shelves.
C) the posterior part of the intermaxillary segment.
D) each primary second molar's dental lamina.
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Chapter 7: Cells
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Q1) How many phases are within interphase when it occurs between cell division?
A) One
B) Two
C) Three
D) Four
Q2) Organs in the body are know to be able to functioning together as a(n):
A) organ.
B) tissue.
C) cell.
D) system.
Q3) Which of the following functions are performed by the Golgi complex within the cell?
A) Metabolizes foreign compounds
B) Produces ribosomes
C) Packages protein compounds
D) Produces energy for the cell
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Chapter 8: Basic Tissue
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Q1) The main superficial layer of the basement membrane is the _____ and is produced by the epithelium.
A) reticular lamina
B) basal lamina
C) lamina lucida
D) lamina densa
Q2) Which of the following structures separates the epithelium from the connective tissue?
A) Submucosa
B) Basement membrane
C) Periosteum
D) Endosteum
Q3) By weight,which of the following is considered the most abundant type of basic tissue in body?
A) Nerve tissue
B) Connective tissue
C) Muscle tissue
D) Epithelial tissue
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Chapter 9: Oral Mucosa
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Q1) Which of the following layers make up the bulk of nonkeratinized epithelium in the oral cavity?
A) Basal layer
B) Intermediate layer
C) Superficial layer
D) Prickle layer
Q2) In a young adult,the buccal mucosa may contain Fordyce spots,which refer to:
A) salivary gland tissue trapped in the lamina propria.
B) deposits of sebum from misplaced sebaceous gland tissue.
C) hyperkeratinized areas from localized tissue trauma.
D) remnants of tonsillar tissue misplaced in the epithelium.
Q3) Which of the following is considered correct regarding hyperkeratinization of the oral mucosa?
A) It commonly occurs on buccal mucosa with the linea alba.
B) It is associated with chronic freezing of the tissue.
C) It is a response to frictional but not chemical trauma.
D) Changes are reversible even if the source of the injury is not removed.
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Chapter 10: Gingival and Dentogingival Junctional Tissue
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Q1) What occurs when damaging agents enter the junctional epithelium and the gingival tissue undergoes the initial signs of active disease?
A) Gingival hyperplasia
B) Gingival recession
C) Gingivitis
D) Periodontitis
Q2) Which of the following will extend through the gingival epithelial cell membrane,recognizing the presence of the bacterial endotoxins so as to mobilize the inflammatory response?
A) Tonofilaments
B) Toll-like receptors
C) Lysosomes
D) Chromatin
Q3) The most permeable section of the gingiva is considered which of the following?
A) Sulcular epithelium
B) Junctional epithelium
C) Both sulcular and junctional epithelia
D) Neither sulcular nor junctional epithelia
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Chapter 11: Head and Neck Structures
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Q1) Which of the following can never be palpated during an extraoral examination of a patient?
A) Thyroid gland
B) Lymph nodes
C) Parathyroid glands
D) Parotid gland
Q2) Which of the following salivary glands is unencapsulated?
A) Submandibular gland
B) Parotid gland
C) Sublingual gland
D) Both parotid and sublingual glands
Q3) What is the depression on the side of a lymph node termed?
A) Afferent vessel
B) Hilus
C) Efferent vessel
D) Lymphatic nodule
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13
Chapter 12: Enamel
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Q1) In what part of the erupted tooth is mature enamel noted?
A) Anatomical crown
B) Anatomical root
C) Both anatomical crown and clinical crown
D) Both anatomical root and clinical root
Q2) Which of the following is a projection of the basal or secretory end of each ameloblast that faces the dentinoenamel junction?
A) Enamel spindle
B) Tomes process
C) Tomes granular layer
D) Hunter-Schreger bands
Q3) The crystals in the enamel rod groups bend sinusoidally to the right or left at a slightly different angle than do adjacent groups,which is shown in the:
A) Tomes granular layer.
B) Hunter-Schreger bands.
C) lines of Retzius.
D) imbrication lines of von Ebner.
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Chapter 13: Dentin and Pulp
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Q1) In which location is the cell body of the odontoblast found in a mature,healthy erupted tooth?
A) Along the dentinoenamel junction
B) Along the outer pulpal wall
C) Near the dentinocemental junction
D) Near the pulpal core
Q2) Predentin is the initial material laid down by the:
A) odontoblasts.
B) ameloblasts.
C) preameloblasts.
D) odontoclasts.
Q3) Which of the following is the only sensation perceived by the brain from the pulp's sensory nerves?
A) Taste
B) Pain
C) Pressure
D) Temperature
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Chapter 14: Periodontium: Cementum, Alveolar Process, and Periodontal Ligament
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Q1) The rests of Malassez are correctly described as:
A) remnants of the outer enamel epithelium.
B) similar to the incremental growth lines in dentin.
C) remnants of Hertwig root sheath.
D) similar to the incremental growth lines in enamel.
Q2) Which of the following tissue types is most likely the source of cementogenic cells in adults who have undergone root planning?
A) Bone marrow
B) Periodontal ligament
C) Residual cementum patches
D) Alveolar process
Q3) The alveolar process between two neighboring teeth is specifically called the _____ bone.
A) interdental
B) basal
C) interradicular
D) trabecular
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Page 16
Chapter 15: Overview of Dentitions
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Q1) Which of the following characteristics is noted in a patient during the primary dentition period as compared with the permanent dentition period?
A) Larger overall crowns
B) Lighter enamel color
C) Longer roots
D) Greater number of teeth
Q2) When comparing the arches of the two dentitions,one arch of the primary dentition usually contains:
A) two more incisors.
B) four more total teeth.
C) four fewer molars.
D) six fewer total teeth.
Q3) Which of the following usually signals the end of the mixed dentition period?
A) Eruption of first primary tooth
B) Eruption of first permanent tooth
C) Shedding of first primary tooth
D) Shedding of last primary tooth
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Chapter 16: Permanent Anterior Teeth
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Q1) Which of the following teeth may have a linguogingival groove?
A) #7 and #8
B) #12 and #13
C) #24 and #25
D) #27 and #28
Q2) The number of mamelons seen on a newly erupted permanent maxillary central incisor is:
A) one.
B) two.
C) three.
D) four.
Q3) The lingual ridge is located ____ on the lingual surface of permanent maxillary canines.
A) mesiodistally
B) incisocervically
C) obliquely
D) cervically
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Chapter 17: Permanent Posterior Teeth
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Q1) Which of the following teeth have two forms that involve either a three-cusp type or a two-cusp type?
A) #13
B) #20
C) #21
D) #28
Q2) The crown outline from an occlusal view of the permanent mandibular first premolar is:
A) diamond shaped.
B) rhomboidal.
C) pentagonal.
D) ovoid shaped.
Q3) Which surface of the permanent maxillary first molars may have increased supragingival tooth deposits?
A) Mesiobuccal
B) Distobuccal
C) Palatal
D) Occlusal
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Chapter 18: Primary Dentition
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Q1) Which of the following features is noted concerning the hard dental tissue of a primary molar as compared to that of a permanent molar?
A) Thinner dentin between pulp chambers and enamel
B) Overall thinner enamel throughout the crown
C) Overall thicker dentin throughout the crown and root
D) Inconsistent enamel thickness throughout the crown
Q2) Which of the following complications are associated with extraction of primary molars?
A) Susceptible to fracture during extraction procedures
B) Concrescence with nearby canines
C) Dilaceration of the root trunk
D) Extra root branches
Q3) The crown of the primary mandibular central incisor looks more like the primary _____ than its permanent successor.
A) maxillary central incisor
B) maxillary lateral incisor
C) mandibular lateral incisor
D) maxillary canine
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20
Chapter 19: Temporomandibular Joint
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Q1) Which of the following completely encloses the temporomandibular joint?
A) Postglenoid process
B) Joint capsule
C) Periosteum
D) Growth center
Q2) Which of the following is not the usual movement of the temporomandibular joint involving the mandible and allowed by the gliding and rotation of the joint?
A) Retraction
B) Protrusion
C) Depression
D) Subluxation
Q3) On cross section,each joint disc of the temporomandibular joint appears caplike on the mandibular condyle,with its superior aspect _____ from anterior to posterior and its inferior aspect concave.
A) concave
B) convex
C) flat
D) concavoconvex
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21
Chapter 20: Occlusion
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Q1) Lateral deviation of the mandible,or lateral excursion,is evaluated by shifting the lower jaw:
A) forward.
B) backward.
C) upward.
D) side to side.
Q2) Which of the following is (are) not considered part of the three areas of centric contacts or centric stops?
A) Height of contour
B) Marginal ridges
C) Central fossae
D) Occlusal pits
Q3) Which Angle classification of malocclusion in the permanent dentition is characterized by an ideal mesiodistal relationship of the jaws and dental arches?
A) Class I
B) Class II, division I
C) Class II, division II
D) Class III
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