1) In an adult jaw, what type of bone marrow is predominantly found, and how might foci of red bone marrow appear radiographically?
A) Red marrow; as zones of radiopacity.
B) Fatty or yellow marrow; as zones of radiolucency.
C) Cancellous marrow; as dense white areas.
D) Cortical marrow; as thin, dark lines.
Answer: B) Fatty or yellow marrow; as zones of radiolucency. ✅
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2) The alveolar bone proper (ABP) is histologically characterized by several features. Which statement accurately describes a characteristic of the ABP?
A) It is primarily composed of cancellous trabeculae, providing structural support.
B) It contains Volkmann’s canals, allowing blood vessels, lymphatics, and nerves to connect the PDL with cancellous bone.
C) It appears as a radiolucent line surrounding the tooth root on radiographs.
D) It is the external plate of cortical bone that surrounds the entire alveolar process.
Answer: B) It contains Volkmann’s canals, allowing blood vessels, lymphatics, and nerves to connect the PDL with cancellous bone. ✅
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3) What is the primary function of the periodontal ligament?
A) To produce saliva for oral lubrication.
B) To form the enamel layer of the tooth.
C) To connect the tooth root with the alveolar bone.
D) To provide sensory innervation to the tooth pulp.
Answer: C) To connect the tooth root with the alveolar bone. ✅
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4) What critical functional difference exists between a natural tooth and a successfully integrated dental implant?
A) The bone around implants remodels at a significantly faster rate than the bone supporting natural teeth.
B) Implants are inherently stronger and less prone to fracture than natural teeth because of their direct bone integration.
C) Natural teeth possess a shock-absorbing mechanism and sensory feedback that implants lack, impacting occlusal load distribution and proprioception.
D) Implants are more susceptible to bacterial infection due to the absence of a protective cementum layer.
Answer: C) Natural teeth possess a shock-absorbing mechanism and sensory feedback that implants lack, impacting occlusal load distribution and proprioception. ✅
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5) A clinician observes a healthy, stippled appearance on a patient’s attached gingiva. This characteristic texture is a direct result of the intricate interplay between which two microscopic features?
A) The gingival sulcus and the junctional epithelium.
B) The oral epithelium and the mucogingival junction.
C) The gingival fibers and the underlying alveolar bone.
D) The rete pegs of the epithelium and the connective tissue papillae.
Answer: D) The rete pegs of the epithelium and the connective tissue papillae. ✅
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6) ………. is the branch of dentistry concerned with prevention and treatment of periodontal disease.
A) Periodontology.
B) Prevention.
C) Periodontics.
D) Periodontal therapy.
Answer: C) Periodontics ✅
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7) ………. is defined as the space or shallow crevice between the tooth and the free gingiva.
A) Interdental gingiva.
B) Col.
C) Gingival sulcus.
D) Free gingival groove.
Answer: C) Gingival sulcus. ✅
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8) Regarding the thickness of the alveolar process, which statement is accurate?
A) The distance between the crest of the alveolar bone and the cementoenamel junction decreases with age.
B) The thickness is uniform across all regions of the maxilla and mandible.
C) The thickness varies depending on the position of the teeth, with labially positioned teeth having thin labial radicular bone.
D) Teeth positioned labially in the arch typically have thicker labial radicular bone and thinner lingual radicular bone.
Answer: C) The thickness varies depending on the position of the teeth, with labially positioned teeth having thin labial radicular bone. ✅
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9) Where is the mucogingival junction typically absent?
A) Between the attached gingiva and the alveolar mucosa.
B) On the palatal side of the gingiva.
C) On the facial surface of the gingiva.
D) On the lingual surface of the gingiva.
Answer: B) On the palatal side of the gingiva .✅
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