Preclinical Dental Sciences
Exam Questions
Course Introduction
Preclinical Dental Sciences introduces students to the foundational concepts and practical skills essential for dental practice. The course covers the basic structure and function of oral tissues, tooth morphology, oral histology, and embryology, preparing students for clinical procedures. Hands-on laboratory sessions emphasize the development of manual dexterity, precision, and familiarity with dental materials and instruments. Students also learn about infection control, patient safety protocols, and the principles of dental anatomy, serving as a critical bridge between basic science education and clinical dental training.
Recommended Textbook
Essentials of Oral Histology and Embryology A Clinical Approach 4th Edition by Daniel J. Chiego
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514 Verified Questions
514 Flashcards
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Chapter 1: Development and Structure of Cells and Tissues
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Sample Questions
Q1) Endoderm and ectoderm are the first two germ layers to develop.
A)True
B)False
Answer: True
Q2) The ovum contains twice as many chromosomes as its parent cell.
A)True
B)False Answer: False
Q3) Myotome produces ___________ tissue. Answer: muscle
Q4) The embryonic skeleton first forms as bone.
A)True
B)False Answer: False
Q5) ___________ __________appear in the third prenatal week as the first sign of shape change in the embryo's body.
Answer: Neural folds
Q6) ___________bone formation occurs directly through a tight matrix of collagen fibers,which slowly calcify into bone. Answer: Intramembranous
Page 3
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Chapter 2: Structure and Function of Cells, Tissues, and Organs
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Sample Questions
Q1) Which cell supports the nervous system?
A) Myoblast
B) Neuroglia
C) Leukocyte
D) Melanocyte
Answer: B
Q2) The three functions of the _____ _____ are to absorb nutrition,dehydrate food,and compress food into solid waste.
Answer: large intestine
Q3) Internal organs (viscera)receive most of their neural impulses from which nervous system?
A) Somatic
B) Sensory
C) Afferent
D) Autonomic
Answer: D
Q4) Blood provides protection from bacteria.
A)True
B)False
Answer: True
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Chapter 3: Development of the Oral Facial Region
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31 Verified Questions
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Sample Questions
Q1) Which branchial arches form the hyoid bone?
A) I and II
B) II and III
C) III and IV
D) IV and V
Answer: B
Q2) Which defines the term synchondrosis?
A) The rod-shaped cartilage of the hyoid arch
B) The center of all growth and function in the mandible
C) A band of connective tissue containing osteogenic cells
D) A union of two bones that have been separated by cartilage
Answer: D
Q3) The mandible develops from the second branchial arch.
A)True
B)False
Answer: False
Q4) Which type of facial suture has a beveled or overlapping junction?
Answer: Squamosal
Q5) In which two locations do pharyngeal fistulas open to drain?
Answer: Side of the neck,pharynx
5
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Chapter 4: Development of the Face and Palate
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Sample Questions
Q1) In which direction do the palatine shelves grow on contact with the tongue in the seventh prenatal week?
Q2) The eyes move to the front of the face in the sixth week of prenatal development.
A)True
B)False
Q3) Identity two examples of apoptosis in prenatal development.
Q4) Which muscle grows around the oral pit in the sixth prenatal week?
A) Buccinator
B) Mylohyoid
C) Orbicularis oris
D) Zygomatic major
Q5) Each cranial nerve innervates the tongue,except one.Which is the exception?
A) V
B) VII
C) VIII
D) X
Q6) The _________ separates the oral and nasal cavities.
Q7) In the fifth week,the frontal process becomes known as the _______ process.
Q8) List the components of the Waldeyer tonsillar ring.
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Chapter 5: Development of Teeth
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Sample Questions
Q1) 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
Q2) Compact bone is the most highly calcified tissue in the human body.
A)True
B)False
Q3) 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
Q4) Which tissue does not support the dentition?
A) Enamel
B) Cementum
C) Alveolar bone
D) Periodontal ligament
Q5) ________ ________ is a genetic disorder that makes teeth susceptible to excessive wear.
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Chapter 6: Eruption and Shedding of the Teeth
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Sample Questions
Q1) Hard tissue resorption is composed of which two phases?
A) Mineral and collagen phases
B) Prefunctional and functional phases
C) Extracellular and intracellular phases
D) Fibroclast eruptive and osteoclast functional phases
Q2) The mixed dentition phase occurs from approximately _____ years of age.
A) birth to 2
B) 3 to 6
C) 8 to 12
D) 13 to 18
Q3) The formation of the eruption ____________ is necessary for tooth eruption.
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
Q5) Name two characteristics of both primary and permanent dentitions.
Q6) Enamel is twice as thick in permanent teeth as it is in primary teeth.
A)True
B)False
Page 8
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Chapter 7: Enamel
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Sample Questions
Q1) In the Hunter-Schreger phenomenon,adjacent rod groups lie at right angles to each other.
A)True
B)False
Q2) An enamel ______ houses a small extension of a living odontoblast.
A) rod
B) tuft
C) spindle
D) lamellae
Q3) Ameloblasts travel along parallel paths to produce straight enamel rods.
A)True
B)False
Q4) Etching the surface of enamel stimulates remineralization.
A)True
B)False
Q5) The neonatal line is best defined as which of the following?
A) An accentuated incremental line
B) A defect caused by the misdirection of enamel rods
C) Light and dark enamel rod groups, made visible with light
D) A series of dark growth rings noticeable in the cross section of enamel
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Chapter 8: Dentin
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Sample Questions
Q1) Dentin is _______ than enamel.
A) harder
B) more elastic
C) a whiter shade
D) less radiolucent
Q2) Which is the following is a hypermineralized collar of dentin that grows within the tubule?
A) Sclerotic dentin
B) Peritubular dentin
C) Intertubular dentin
D) Interglobular dentin
Q3) The granular layer of Tomes is located in the _________.
A) dentin of the root
B) dentin of the crown
C) periodontal ligament
D) cementum of the root
Q4) Dentin is responsive to the environment.
A)True
B)False
Q5) An ________ __________ is the defining characteristic of globular dentin.
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Chapter 9: Dental Pulp
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Sample Questions
Q1) Odontoblasts appear ___________________________ in the pulp horn area.
Q2) The apical foramen is slightly larger in _____ teeth.
A) anterior
B) posterior
C) maxillary
D) mandibular
Q3) The largest blood vessels in dental pulp are controlled by the ______ nervous system.
Q4) Coronal pulp is much smaller than root pulp.
A)True
B)False
Q5) In which theory is pain the result of odontoblastic movement into nerve endings?
A) Transduction
B) Hydrodynamic
C) Pain transmission
D) Direct innervation
Q6) Radicular pulp is singular in all permanent teeth.
A)True
B)False
Q7) List five functions of pulp tissue.
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Chapter 10: Cementum
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Sample Questions
Q1) Cementum resorption is a characteristic of aging cementum.
A)True
B)False
Q2) List two characteristic differences between cementum and bone.
Q3) Cementum is highly vascularized.
A)True
B)False
Q4) Which of the following best defines the term ankylosis?
A) Alveolar bone fuses with cementum.
B) The cementum fuses with underlying dentin.
C) Alveolar bone fuses with the PDL ligament.
D) The cementum of two adjacent teeth fuses together.
Q5) Cementum is devoid of elastic fibers.
A)True
B)False
Q6) Inner root sheath cells form the cellular-acellular cementum.
A)True
B)False
Q7) In terms of cementum formation,what does OMG stand for?
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) The periodontal ligament connects with the gingival tissues.
A)True
B)False
Q2) Which of the following is found on the surface of cementum?
A) Fibroblasts
B) Cementicles
C) Cementocytes
D) Cementoblasts
Q3) The overall general health of an individual affects the health of the periodontium.
A)True
B)False
Q4) Interstitial spaces contain _______ _______ and nerve trunks that maintain the vitality of the periodontal ligament (PDL).
Q5) Which arises from the dental follicular tissue?
A) Dentin
B) Enamel
C) Cementicles
D) Periodontium
Q6) ___________ stem from monocytes within the blood vascular system.
Page 13
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Chapter 12: Periodontium: Alveolar Process and Cementum
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Sample Questions
Q1) Which is identified radiographically as the lamina dura?
A) Pulp
B) Cementum
C) Sharpey fibers
D) Alveolar bone proper
Q2) Once formed,fibers attached to the cementum cannot change.
A)True
B)False
Q3) Blood vessels and nerves penetrate the lamina dura.
A)True
B)False
Q4) Explain the diagnostic significance of the lamina dura.
Q5) ___________ canals pass through the long axis of the bone.
Q6) Maintenance of the alveolar bone and cementum is reliant on which of the following?
A) Resorption
B) Tooth function
C) Routine professional dental care
D) Periods of masticatory inactivity
Q7) Name the two components of the alveolar process.
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Chapter 13: Temporomandibular Joint
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Sample Questions
Q1) The action of the lower half of the TMJ is a gliding motion.
A)True
B)False
Q2) Which of the following is a function of the lateral ligament of the temporomandibular joint?
A) Operates in retraction of the disk
B) Strengthens the capsule and allows freedom of condylar movement
C) Provides strong insulation between the condylar heads and articular surfaces
D) Supports the joint and limits excursions of the condyles to a normal range
Q3) 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
Q4) The _________ is a spine of bone arising from the rim of the mandibular foramen.
Q5) When the mouth opens,each condylar head slides along the articular ________.
A) pad
B) fossa
C) plane
D) eminence
Page 15
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Chapter 14: Oral Mucosa
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Sample Questions
Q1) Name the five taste modalities of the oral cavity.
Q2) Hemidesmosomes attach the lamina propria to the stratum basal.
A)True
B)False
Q3) Which of the following best describes the shape of the col between the anterior teeth?
A) Flat
B) Concave
C) Sharp peak
D) Slightly convex
Q4) Organize the layers of masticatory mucosa from the most superficial layer to the most internal.
A) Stratum corneum, stratum granulosum, stratum spinosum, basal lamina
B) Stratum spinosum, basal lamina, stratum corneum, stratum granulosum
C) Basal lamina, stratum spinosum, stratum granulosum, stratum corneum
D) Stratum granulosum, stratum corneum, basal lamina, stratum spinosum
Q5) Taste buds are derived from the surrounding epithelium and are not associated with nerve endings of the tongue.
A)True
B)False
Page 16
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Chapter 15: Salivary Glands and Tonsils
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Sample Questions
Q1) The intercalated ducts of the salivary glands contain mitochondria,endoplasmic reticulum,and secretory granules.
A)True
B)False
Q2) A tubal tonsil is which of the following?
A) An ectopic tonsil located near a eustachian tube
B) A tonsil containing epithelial folds that double over into tubes
C) An infected tonsil that must be drained through the use of tubes
D) Tonsillar tissue that grows around other nearby glands in a tubular shape
Q3) Sympathetic stimulation of a salivary gland produces which type of secretion?
A) Watery
B) Organic
C) Gelatinous
D) Protein-poor
Q4) Lingual tonsils have ____________ crypts.
A) deep
B) narrow
C) branching
D) wide-mouthed
Q5) Name the ducts that lead from the parotid and submandibular salivary glands.
Page 17
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Chapter 16: Biofilms
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Sample Questions
Q1) Which of the following forms the primary cuticle?
A) Fibroblasts
B) Ameloblasts
C) Odontoblasts
D) Cementocytes
Q2) Bacterial ghosts are calcified bacteria.
A)True
B)False
Q3) The dark color of supragingival calculus is attributed to which of the following?
A) Calcium
B) Hydroxyapatite
C) Organic skeletons
D) Serum and blood pigments
Q4) The _________ allows plaque to form on the surface of the tooth.
Q5) Salivary mucin contributes to the formation of plaque biofilm.
A)True
B)False
Q6) The central __________ of a molar is an ideal site for the colonization of oral organisms.
Page 18
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