Dental Anatomy
Final Test Solutions
Course Introduction
Dental Anatomy is a foundational course that explores the structure, function, and development of the human teeth and their supporting tissues. The course covers the morphology of primary and permanent dentitions, including the identification and differentiation of each tooth type. Students learn about tooth eruption patterns, occlusion, and the anatomical features important for clinical procedures. Understanding dental anatomy is essential for performing restorative, preventive, and diagnostic dental care, as it provides the basis for recognizing normal and abnormal oral conditions and facilitates effective patient treatment planning.
Recommended Textbook
Essentials of Oral Histology and Embryology A Clinical Approach 4th Edition by Daniel J. Chiego
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16 Chapters
514 Verified Questions
514 Flashcards
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2
Chapter 1: Development and Structure of Cells and Tissues
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Sample Questions
Q1) Which chemical is called the second messenger?
A) aDNA
B) mRNA
C) dGMP
D) cAMP
Answer: D
Q2) Name three adult structures that are derived from ectoderm.
Answer: Students should answer with three of the following: tooth enamel,nails,hair,nervous system,mammary and cutaneous glands,epithelium of sinuses,epithelium of oral and nasal cavities,epithelium of intraoral glands,sensory epithelium of eye or sensory epithelium of ear.
Q3) DNA replication takes place during the G1 phase of the cell cycle.
A)True
B)False
Answer: False
Q4) The umbilical system carries oxygenated blood.
A)True
B)False
Answer: True
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Chapter 2: Structure and Function of Cells, Tissues, and Organs
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36 Verified Questions
36 Flashcards
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Sample Questions
Q1) Which cell supports the nervous system?
A) Myoblast
B) Neuroglia
C) Leukocyte
D) Melanocyte
Answer: B
Q2) _______ line the respiratory tract to move foreign particles out of the respiratory system.
Answer: Cilia
Q3) Which organ system secretes and regulates hormones in the blood?
Answer: Endocrine system
Q4) Each is part of a neuron,except one.Which is the exception?
A) Axon
B) Plasma
C) Dendrite
D) Perikaryon
Answer: B
Q5) ________ return blood to the heart.
Answer: Veins
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Chapter 3: Development of the Oral Facial Region
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Sample Questions
Q1) The mandible is formed from the ________ branchial arch.
Answer: first
Q2) Meckel's cartilage acts as a framework for the developing mandible.
A)True
B)False
Answer: True
Q3) Identify three facial sutures.
Answer: Zygomaticomaxillary,frontomaxillary,zygomaticotemporal
Q4) Branchial clefts may be found along the anterior border of the trapezius muscle.
A)True
B)False
Answer: False
Q5) The heart begins beating at the end of the _________ week.
Answer: fourth
Q6) The glossopharyngeal nerve (IX)provides taste sensation to the anterior two thirds of the tongue.
A)True
B)False
Answer: False
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Chapter 4: Development of the Face and Palate
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Sample Questions
Q1) Which best defines the term nasal fin?
A) Oblique groove extending from the nostrils to the eyes
B) Medial nasal process that composes part of the upper lip
C) Zone of fusion that binds the maxillary and medial processes
D) Wedge-shaped process that assists in the formation of the palate
Q2) Bilateral nasal placodes appear in the seventh week of gestation.
A)True
B)False
Q3) Which muscle grows around the oral pit in the sixth prenatal week?
A) Buccinator
B) Mylohyoid
C) Orbicularis oris
D) Zygomatic major
Q4) The second pharyngeal arch is also known as the __________ arch.
A) hyoid
B) inferior
C) superior
D) mandibular
Q5) In which direction do the palatine shelves grow on contact with the tongue in the seventh prenatal week?
6
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Chapter 5: Development of Teeth
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Sample Questions
Q1) Which layer of the enamel organ is most closely associated with blood vessels?
A) Stellate reticulum
B) Stratum intermedium
C) Inner enamel epithelium
D) Outer enamel epithelium
Q2) The terminal bar apparatus is a series of hemidesmosomes.
A)True
B)False
Q3) During root development,the epithelial diaphragm __________.
A) fuses to the stratum intermedium
B) surrounds the apical opening of the dental pulp
C) forms the cortical plate, which covers the mandible
D) deposits an enamel matrix along the dentoenamel junction
Q4) The term reduced enamel epithelium is best defined as which of the following?
A) Noncalcified cementum
B) Material deposited by odontoblasts in response to trauma
C) Fused layer of ameloblasts, enamel epithelium, and stratum intermedium
D) Layer of outer root sheath cells that disperse into small clusters around the root
Q5) The periodontal ligament attaches which two surfaces?
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Chapter 6: Eruption and Shedding of the Teeth
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Sample Questions
Q1) The permanent teeth that replace the primary teeth are called ______.
A) supportive
B) accessional
C) overlapping
D) successional
Q2) The reduced enamel epithelium fuses with the oral epithelium during prefunctional eruption.
A)True
B)False
Q3) The ______ stage of tooth development contains permanent and primary teeth in various stages of formation.
A) preeruptive
B) mixed dentition
C) late prefunctional
D) functional eruptive
Q4) Which of the following best defines ankylosis?
A) A fusion of tooth roots
B) A process that leads to tooth eruption
C) The removal of bone overlying the bony crypt
D) The eruption of a tooth into a space occupied by an opposing tooth
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Chapter 7: Enamel
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Sample Questions
Q1) Enamel lamellae are not tubular defects,but leaflike tracts.
A)True
B)False
Q2) Each enamel rod is formed by a single ameloblast.
A)True
B)False
Q3) Enamel varies in density and hardness.
A)True
B)False
Q4) Lamellae are cracks in the surface of enamel and are visible to the naked eye.
A)True
B)False
Q5) Enamel is approximately ______thick at the occlusal or incisal surface.
A) 1 µm
B) 9 µm
C) 2.5 mm
D) 4.5 mm
Q6) Name the organic component of enamel.
Q7) Two ameloblast cells form the enamel rod _________.
Q8) The surface of an enamel rod is called the ______ _______.
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Chapter 8: Dentin
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Sample Questions
Q1) Secondary dentin is the result of insufficient mineralization.
A)True
B)False
Q2) Dentin is responsive to the environment.
A)True
B)False
Q3) Which best defines sclerotic dentin?
A) The dentinal matrix that immediately surrounds the dentinal tubule
B) The first dentin formed and deposited at the dentinoenamel junction
C) Dentin directly underlying mantle dentin, comprising the bulk of primary dentin
D) Obliterated tubules, found mainly in areas of attrition, abrasion, fracture, and caries
Q4) Osteodentin is a form of reparative dentin that resembles cartilage.
A)True
B)False
Q5) _________ dentin forms when newly recruited odontoblasts begin depositing dentin.
Q6) An ________ __________ is the defining characteristic of globular dentin.
Q7) Primary dentin consists of mantle,globular,and _________ dentin.
Page 10
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Chapter 9: Dental Pulp
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Sample Questions
Q1) Tight junctional complexes are communication openings between odontoblasts that transmit electrical impulses and small molecules.
A)True
B)False
Q2) List five functions of pulp tissue.
Q3) The odontogenic zone is composed of a cell-free zone,a cell-rich zone,odontoblasts,and the parietal plexus of nerves.
A)True
B)False
Q4) Pulpal capillaries are lined with _____.
A) epithelial cells
B) endothelial cells
C) myelinated axons
D) nonmyelinated axons
Q5) Pulpal cells ___________ with age or trauma.
A) increase
B) decrease C) disappear
D) stay the same
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Chapter 10: Cementum
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Sample Questions
Q1) In terms of cementum formation,what does OMG stand for?
Q2) Aging cementum may obstruct the ______ _______.
Q3) Inner root sheath cells form the cellular-acellular cementum.
A)True
B)False
Q4) Cementum is thickest at which of the following?
A) Apex of the root
B) Cementoenamel junction
C) Cervical region of the root
D) Furcation of multirooted teeth
Q5) List two characteristic differences between cementum and bone.
Q6) Which percentage of collagen is found in organic cementum?
A) 20% to 25%
B) 30% to 35%
C) 40% to 45%
D) 50% to 55%
Q7) A ________ ________ is created by the deposition of cementum following resorption.
Q9) In what percentage of cases does cementum meet enamel? Page 12
Q8) Following resorption,cemental repair is a function of the ____________.
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Chapter 11: Periodontium: Periodontal Ligament
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Sample Questions
Q1) Name two objects in the periodontal ligament that are phagocytosed by macrophages.
Q2) The periodontal ligament (periodontium)has a width of _________ mm.
A) 0.015 to 0.038
B) 0.15 to 0.38
C) 0.045 to 0.080
D) 0.45 to 0.80
Q3) ______________ create and destroy collagen fibers,as needed.
A) Fibroblasts
B) Osteoclasts
C) Macrophages
D) Cementoblasts
Q4) The most important function of the periodontal ligament is to sense movement.
A)True
B)False
Q5) Macrophages are normally present in the periodontal ligament.
A)True
B)False
Q6) Fibroblasts are most concentrated in the _______ _________.
Q7) ___________ stem from monocytes within the blood vascular system.
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Chapter 12: Periodontium: Alveolar Process and Cementum
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Sample Questions
Q1) Tooth loss causes loss of periodontal fibers,as well as loss of _______ ________.
Q2) Explain the diagnostic significance of the lamina dura.
Q3) Once formed,fibers attached to the cementum cannot change.
A)True
B)False
Q4) The lamina dura is less dense than the adjacent cancellous bone.
A)True
B)False
Q5) Blood vessels and nerves penetrate the lamina dura.
A)True
B)False
Q6) The alveolar crest is ___________ in the molar region.
A) flat
B) peaked
C) rounded
D) scalloped
Q7) ______ ______ penetrate haversian canals at right angles to form a nutrient network.
Q8) ___________ canals pass through the long axis of the bone.
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Chapter 13: Temporomandibular Joint
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Sample Questions
Q1) Which of the following is a function of the temporomandibular joint capsule?
A) Provides joint lubrication
B) Supports articulatory movements
C) Encloses the lateral, medial, and posterior boundaries
D) Keeps the disk immobile when the head of the condyle moves
Q2) A mature mandibular condyle exhibits which characteristic?
A) The condylar head is a round shape.
B) Bone covers the head of the condyle.
C) A thick layer of cartilage covers the head of the condyle.
D) Spikes of porous cartilage project into the underlying bone marrow.
Q3) The _________ is a spine of bone arising from the rim of the mandibular foramen.
Q4) Which branches of the trigeminal nerve innervate the TMJ?
Q5) The action of the lower half of the TMJ is a gliding motion.
A)True
B)False
Q6) No epiphyseal line is found in the TMJ condyle.
A)True
B)False
Q7) Name the two movements of the TMJ.
Q8) Identify the four muscles of mastication.
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Chapter 14: Oral Mucosa
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Sample Questions
Q1) Oral nerve endings are most highly concentrated ________ of the oral cavity.
A) on the roof
B) on the floor
C) in the anterior regions
D) in the posterior regions
Q2) ____________ inject melanosomes into the basal cells of the gingival epithelium.
A) Melanocytes
B) Lymphocytes
C) Merkel cells
D) Langerhans cells
Q3) Which of the following best defines hemidesmosomes?
A) Discoid cells anchored by tonofibrils
B) Sebaceous glands located at the angles of the mouth
C) Minute disks that attach basal cells to the basal lamina
D) Cuboidal cells providing a basal layer for lining mucosa
Q4) Which papillae do not house taste buds?
A) Foliate
B) Filiform
C) Fungiform
D) Circumvallate
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Chapter 15: Salivary Glands and Tonsils
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Sample Questions
Q1) Which salivary component facilitates the breakdown of carbohydrates?
A) Mucin
B) Protein
C) Zymogen granules
D) Immunoglobulin A
Q2) Which structural characteristic makes the palatine tonsil susceptible to infection?
A) Large size
B) Deep crypts
C) Septa capsule
D) Germinal centers
Q3) The _______________ tonsil is also known as the adenoid.
Q4) The palatine,lingual,and pharyngeal tonsils compose the Waldeyer ring.
A)True
B)False
Q5) Which tonsil is located in the floor of the mouth?
A) Lingual
B) Palatine
C) Pharyngeal
D) Both A and B
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Chapter 16: Biofilms
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Sample Questions
Q1) ____________ produce acids that can demineralize the surface of enamel.
Q2) Which organisms attach to the pellicle to form a thick layer of plaque?
A) Rods
B) Filamentous organisms
C) Desquamated epithelial cells
D) All of the above
Q3) Salivary mucin contributes to the formation of plaque biofilm.
A)True
B)False
Q4) Which type of organism appears subgingivally?
A) Neutral
B) Aerobic
C) Gram-positive
D) Gram-negative
Q5) Cuticular protein is the most important function of the primary cuticle.
A)True
B)False
Q6) Dental plaque is characterized as a ________.
Q7) The central __________ of a molar is an ideal site for the colonization of oral organisms.
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