TCDHA PERIODONTICS 1 MIDTERM EXAM/TEXAS COLLEGE OF DENTAL HYGIENE ARTS PERIODONTICS 1 MIDTERM EXAM QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) ALREADY GRADED A+

TCDHA | PERIO 1 MIDTERM | Page 1 of 24


TEXAS COLLEGE OF DENTAL HYGIENE ARTS

PERIODONTICS I — MIDTERM EXAMINATION




TCDHA PERIODONTICS 1 MIDTERM EXAM/TEXAS
COLLEGE OF DENTAL HYGIENE ARTS PERIODONTICS 1
MIDTERM EXAM QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) ALREADY GRADED A+

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TCDHA — PERIODONTICS I | MIDTERM EXAMINATION



SECTION 1: Anatomy & Histology of the Periodontium (Questions 1–20)
1. The periodontium consists of which of the following components?
A. Gingiva, periodontal ligament, cementum, and alveolar bone
B. Gingiva, enamel, dentin, and pulp
C. Gingiva, cementum, dentin, and alveolar bone
D. Periodontal ligament, pulp, enamel, and cementum


2. The junctional epithelium is attached to the tooth surface by means of:
A. Desmosomal junctions
B. Internal and external basal laminae with hemidesmosomes
C. Tight junctions and gap junctions
D. Cementum attachment fibers


3. Which of the following best describes the biological width?
A. The distance from the base of the gingival sulcus to the alveolar crest
B. The combined measurement of the junctional epithelium and the connective tissue
attachment
C. The distance from the free gingival margin to the mucogingival junction
D. The sulcus depth plus the thickness of the free gingiva


4. The average depth of a healthy gingival sulcus is:
A. 0–1 mm
B. 1–3 mm
C. 3–5 mm
D. 5–7 mm


5. The principal fiber groups of the periodontal ligament include all of the following EXCEPT:
A. Alveolar crest group
B. Oblique group
C. Apical group
D. Circumferential group


6. Which principal fiber group of the periodontal ligament is the most numerous and strongest?
A. Horizontal group
B. Alveolar crest group
C. Oblique group
D. Apical group


7. Sharpey's fibers are:
A. Free gingival fibers that anchor the gingiva to the tooth
B. The portions of periodontal ligament fibers that are embedded in cementum and alveolar
bone

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C. Elastic fibers found only in the alveolar mucosa
D. Collagen fibers that form the transseptal group exclusively


8. The cells of the periodontal ligament include all of the following EXCEPT:
A. Fibroblasts
B. Osteoblasts
C. Cementoblasts
D. Ameloblasts


9. The primary function of the oblique fiber group of the periodontal ligament is to:
A. Prevent extrusion of the tooth
B. Resist intrusive and masticatory forces
C. Resist horizontal/lateral forces
D. Connect adjacent teeth across the interdental septum


10. Which of the following correctly describes the blood supply to the periodontium?
A. The gingiva is supplied exclusively by branches of the inferior alveolar artery
B. Three blood sources: supraperiosteal, alveolar, and perforating arteries from the PDL
C. The PDL is avascular and receives nutrients via diffusion only
D. Blood supply comes solely from the gingival papilla vessels


11. Acellular extrinsic fiber cementum (AEFC) is found predominantly:
A. At the apex of the root
B. In the cervical third of the root
C. At the furcation area only
D. Throughout the entire root surface uniformly


12. The mucogingival junction (MGJ) separates:
A. Free gingiva from attached gingiva
B. Attached gingiva from alveolar mucosa
C. Oral epithelium from sulcular epithelium
D. Interdental papilla from the col region


13. Which of the following describes the col region?
A. The concave valley-like area of the interdental gingiva that connects the facial and
lingual papillae beneath the contact area
B. The crest of the interdental gingival papilla
C. The area of attached gingiva adjacent to the alveolar mucosa
D. The base of the gingival sulcus


14. The transseptal fiber group is classified under which fiber category?
A. Periodontal ligament principal fibers
B. Gingival fibers
C. Alveolar fibers
D. Periosteal fibers