Home/Quiz/Board Exam MCQs on Pulp and Periapical Pathology Board Exam MCQs on Pulp and Periapical Pathology Welcome to your Board Exam MCQs on Pulp and Periapical Pathology 1. A patient presents with deep dentinal caries and spontaneous toothache. Clinical examination suggests pulpal inflammation associated with the carious lesion. What is the most common cause of pulpitis? Injudicious cavity preparation Excessive heat during dry polishing of restorations Bacterial invasion from a carious lesion Bacterial invasion through the bloodstream Occlusal trauma without bacterial involvement None Hint 2. A patient with poorly controlled hypertension reports occasional toothache-like discomfort without a clear odontogenic source. The clinician suspects referred pain associated with a vascular headache. This type of odontalgia may result from: A headache radiating to the teeth Nervous tension and worry alone Hyperemia of the pulp caused directly by increased blood pressure Abnormal positioning of the sympathetic nervous system Direct bacterial invasion of an otherwise healthy pulp None Hint 3. A patient reports brief cold sensitivity from a recently restored tooth. The pain stops shortly after the cold stimulus is removed, and percussion is negative. Which statement is FALSE regarding focal reversible pulpitis? Cold application causes pain that persists after removal of the thermal stimulus The tooth may respond to electric pulp testing at a lower current than the contralateral tooth Sensitivity to percussion is generally absent Dilation of pulpal blood vessels may occur The pulp can recover if the irritant is removed None Hint 4. A tooth with untreated deep caries initially demonstrates reversible pulpal inflammation but later develops spontaneous lingering pain. The principal factor driving progression toward irreversible pulpitis is: Vascular strangulation alone Reduced host resistance alone Invasion and progression of microorganisms An increase in microbial virulence as the only mechanism Physiologic reduction in pulpal blood flow None Hint 5. A patient reports spontaneous nocturnal pain from a deeply carious molar. The pain may be provoked by heat and can persist after the stimulus is removed. Which feature is most characteristic of pain associated with irreversible pulpitis? Spontaneous pain Only a brief, shock-like response to cold Pain that always lasts for only a few seconds Pain that is invariably continuous without fluctuation Pain that occurs exclusively during percussion None Hint 6. A tooth with deep caries is examined histologically during the early phase of pulpal inflammation. Which finding represents the earliest expected pulpal response? Vascular dilation and hyperemia Cyst formation Calcification Hyalinization Formation of a dental granuloma None Hint 7. A molar has caused pain for approximately 3 months, especially when exposed to hot liquids. Following extraction, the pulp chamber is found to be almost completely filled with pus, with only small remnants of pulp tissue near the apical region. Which diagnosis best describes this condition? Acute partial pulpitis Acute total pulpitis Suppurative pulpitis Strangulation of the pulp Reversible pulpitis None Hint 8. A young permanent molar with a large open carious exposure has a soft, reddish tissue mass protruding into the cavity. The tissue bleeds easily but is not markedly painful. What is the essential nature of chronic hyperplastic pulpitis (pulp polyp)? A necrotizing lesion A primarily suppurative lesion Proliferation of inflamed granulation-like pulp tissue A very sensitive and invariably painful lesion A noninflammatory epithelial neoplasm None Hint 9. A routine radiograph shows small radiopaque masses within the pulp chamber of an asymptomatic tooth. What does the presence of pulp stones most reliably indicate? Acute pulpitis Acute pulpalgia Chronic periodontitis None of the above Definite pulpal necrosis None Hint 10. A patient has a deeply carious molar with severe spontaneous pain and evidence of purulent pulpal inflammation. If the condition remains untreated, which diagnosis is most likely to progress to a periapical lesion? Internal resorption Focal reversible pulpitis Acute suppurative pulpitis Chronic hyperplastic pulpitis Transient dentinal hypersensitivity None Hint 11. A 28-year-old patient presents with a fluctuant, tender swelling associated with a non-vital mandibular molar. Which microorganism is classically most associated with abscess formation? Viruses Rickettsiae Streptococci Staphylococci Mycoplasma None Hint 12. A patient with a persistent periapical radiolucency after root canal treatment is suspected of having an extraradicular infection. Which microorganism is least commonly associated with survival in periapical lesions compared with the other listed organisms? Pseudomonas species Streptococcus species Porphyromonas species Actinomyces species Enterococcus species None Hint 13. A patient develops rapidly spreading facial swelling, erythema, and induration without a well-localized collection of pus following an untreated odontogenic infection. Which organism is classically associated with cellulitis? Streptococcus mutans Streptococcus pyogenes Pneumococcus Klebsiella species Candida albicans None Hint 14. A patient presents with diffuse swelling of the cheek and submandibular region secondary to an untreated mandibular molar infection. What is the most common underlying cause of facial cellulitis in an odontogenic setting? Trauma alone A pre-existing benign tumor Pericoronitis only Bacterial infection Viral infection None Hint 15. A dental infection produces diffuse, poorly localized inflammation and induration of the connective tissues without a clearly defined pus-filled cavity. Which term best describes this process? Sexually transmitted disease Phlegmon Chronic osteomyelitis Venereal disease Granuloma None Hint 16. A patient develops bilateral swelling and induration of the floor of the mouth from a severe odontogenic infection involving the submandibular and sublingual spaces. Which organisms are classically implicated in Ludwig’s angina? Anaerobic streptococci Aerobic streptococci only Staphylococci only Legionella species Mycobacterium tuberculosis None Hint 17. A patient with a necrotic mandibular molar develops a small, erythematous, elevated lesion on the gingiva through which pus intermittently drains. What is this lesion called? A parulis at the end of a sinus tract An extraction socket A traumatic fibroma A periodontal pocket caused by calculus A mucous retention cyst None Hint 18. A periapical radiolucency is associated with a tooth that has longstanding pulpal necrosis. Microbiological examination demonstrates multiple bacterial species, including anaerobes and facultative organisms. How should a typical periapical granuloma be classified microbiologically? An exclusively anaerobic infection An exclusively aerobic infection A mixed infection A sterile lesion in every case A viral infection None Hint 19. A mandibular molar has a persistent periapical radiolucency, and the clinician must distinguish a periapical cyst from a periapical granuloma. Which method provides the most definitive distinction? Comparison of pain symptoms alone Histopathological examination Radiographic appearance alone The identity of the involved tooth Percussion testing alone None Hint 20. A biopsy from a chronic inflammatory lesion in the posterior mandible shows granulomatous inflammation surrounding refractile particles of vegetable material. The clinician suspects a pulse granuloma. The reaction is most characteristically associated with fragments of: Cotton fibers Black silk Silver amalgam Legumes Dental porcelain None Hint 21. A 28-year-old patient has a nonvital maxillary incisor with a well-defined periapical radiolucency. Histology demonstrates chronic granulomatous inflammation. Which condition is NOT classically characterized by granulomatous chronic inflammation? Sarcoidosis Tuberculosis Histoplasmosis Periapical granuloma Foreign-body granuloma None Hint 22. A mandibular molar with a long-standing periapical radiolucency is extracted for histopathological evaluation. Which microscopic finding is most consistent with the periapical region of the involved tooth? Normal alveolar bone without resorption Osteoclastic resorption of surrounding bone Chronic gingivitis only Intact vital pulp with normal odontoblasts Enamel matrix deposition None Hint 23. A patient presents with rapid-onset severe pain, tenderness to biting, and localized swelling adjacent to a mandibular first molar. The tooth does not respond to pulp sensibility testing. An acute apical abscess most commonly develops as a consequence of: A periodontal pocket alone Occlusal interference Necrotic pulp Chronic gingivitis Reversible pulpitis None Hint 24. A previously treated mandibular molar has a chronic periapical lesion but suddenly develops marked pain, swelling, and tenderness. This acute exacerbation of a pre-existing chronic apical inflammatory lesion is termed: Condensing osteitis Chronic apical abscess Apical cyst Phoenix abscess Acute marginal gingivitis None Hint 25. A nonvital tooth has a long-standing periapical granuloma. Imaging shows a well-circumscribed radiolucency, and histology later confirms a cystic cavity. A periapical (radicular) cyst is most commonly preceded by: Periapical granuloma Periodontal abscess Periapical abscess only Acute gingivitis Condensing osteitis None Hint 26. During microscopic examination of a radicular cyst, the epithelial lining is found to be continuous with the root apex, enclosing the cystic cavity. This lesion is best classified as a: True periapical cyst Pocket cyst only Periapical granuloma without epithelial lining Residual bone cyst Simple bone cyst None Hint 27. A chronic periapical granuloma associated with a nonvital tooth undergoes cystic transformation. Which process is central to the development of a radicular cyst? Increased pressure alone within the granuloma Immune-mediated bone destruction alone Proliferation of odontogenic epithelium within the granuloma Direct action of bacterial enzymes within an established cyst Deposition of enamel matrix at the apex None Hint 28. A patient has a large radicular cyst associated with a nonvital maxillary incisor. Which factor most directly contributes to enlargement of the cystic cavity after its formation? Necrosis of surrounding bone only Suppuration within the cyst lumen in every case Proliferation of foamy macrophages Increased osmotic pressure within the cyst lumen Formation of new enamel None Hint 29. A patient presents with a localized, fluctuant swelling confined to the gingiva near a tooth, without evidence of pulpal necrosis or a deep periapical lesion. The clinician diagnoses a parietal abscess. This term is most closely associated with a: Gingival abscess Periodontal abscess Periapical abscess Periodontal cyst Radicular cyst None Hint 30. A radicular cyst develops in the periapical region of a nonvital tooth. Which odontogenic epithelial structure provides the epithelial cells that may proliferate to form its lining? Cell rests of Serres Enamel organ Reduced enamel epithelium Cell rests of Malassez Dental papilla None Hint 31. A 34-year-old patient presents with a well-defined periapical radiolucency associated with a previously restored mandibular molar. Pulp testing shows no response. Which finding is a constant feature of a radicular cyst? An impacted tooth A missing tooth A nonvital tooth An anomalous tooth A vital adjacent tooth None Hint 32. A histopathology report describes a radicular cyst in which the cystic cavity communicates directly with the apical foramen of the involved tooth. What is the appropriate term for this type of cyst? Residual cyst Bay cyst Paradental cyst Collateral cyst Lateral periodontal cyst None Hint 33. A periapical cystic lesion is submitted for microscopic examination. Eosinophilic, hyaline, curved or linear structures are identified within the epithelial lining. These structures are known as Rushton bodies and are most characteristically associated with which lesion? Calcifying odontogenic cyst Gingival cyst of adults Gingival cyst of newborns Lateral periodontal cyst Radicular cyst None Hint 34. A patient with a long-standing odontogenic infection develops pain, swelling, and tenderness involving the jaw. The infection extends through the cancellous portion of bone. Osteomyelitis initially represents inflammation of which anatomical component? Cortical bone Periosteum Medullary bone Periosteum alone Alveolar mucosa None Hint 35. A patient presents with early jaw pain and mild swelling caused by suspected acute osteomyelitis. No sequestrum is yet visible on the radiograph. Which is the earliest radiographic change expected? Solitary or multiple small radiolucent areas Increased granular radiopacity Blurring of trabecular outlines Large radiopaque sequestra Complete loss of the cortical outline None Hint 36. An 11-year-old patient has a firm, painless unilateral mandibular swelling. Imaging shows layered new bone formation along the inferior border of the mandible. Which feature is most characteristic of chronic osteomyelitis with proliferative periostitis (Garre osteomyelitis)? Endosteal bone formation Periosteal bone formation Rapid cortical bone resorption Diffuse medullary necrosis without new bone Formation of a soft-tissue cyst None Hint 37. A young patient presents with a firm expansion of the mandibular body associated with a chronic odontogenic infection. Which form of osteomyelitis is particularly associated with jaw expansion due to reactive new bone formation? Garre osteomyelitis Chronic diffuse sclerosing osteomyelitis Chronic focal sclerosing osteomyelitis Acute hematogenous osteomyelitis Post-radiation osteonecrosis None Hint 38. A routine radiograph shows a localized area of increased periapical radiopacity associated with a mandibular first molar with a large restoration. The patient reports little or no pain. Which statement best describes focal sclerosing osteomyelitis (condensing osteitis)? It is caused primarily by excessive periosteal bone formation It is invariably extremely painful It is commonly associated with a low-grade chronic inflammatory stimulus It is a usual sequel of sequestrectomy It always occurs around a vital tooth None Hint 39. A patient has a well-defined periapical radiopacity with an intact root outline. Pulp testing of the associated tooth is positive, and there is no evidence of pulpal necrosis. Which periapical condition is often associated with a vital pulp? Apical cyst Apical scar Condensing osteitis Chronic apical periodontitis Acute apical abscess None Hint 40. A patient reports mild discomfort from a mandibular molar with deep caries. Radiography reveals a localized periapical radiopaque mass with the entire root outline still discernible. Which diagnosis is most consistent with a reactive sclerotic lesion associated with pulpal inflammation? Cementoblastoma Condensing osteitis Chronic apical periodontitis Acute apical periodontitis Periapical cemento-osseous dysplasia None Hint 41. A mandibular molar with deep caries shows a periapical radiopacity. The entire root outline remains visible, whereas another lesion is fused to the root and obscures its outline. Which finding best differentiates condensing osteitis from benign cementoblastoma? Condensing osteitis occurs only with vital teeth, whereas cementoblastoma occurs with nonvital teeth Condensing osteitis is attached to the root, whereas cementoblastoma is separate from it Cementoblastoma most commonly affects maxillary first molars The root outline is usually visible in condensing osteitis but may be obliterated by cementoblastoma Both lesions are distinguished only by the presence of pain None Hint 42. A patient returns several days after mandibular molar extraction with severe, radiating pain and an empty socket containing little or no blood clot. There is no obvious pus or progressive facial swelling. This condition is best classified as: Acute suppurative osteomyelitis Alveolar osteitis Osteoma Periostitis Chronic diffuse sclerosing osteomyelitis None Hint 43. A radiographic examination shows progressive loss of tooth structure from the external root surface, with the resorptive defect beginning outside the pulp space. In dental pathology terminology, this process may be referred to as: A malignant odontogenic tumor A benign odontogenic tumor External resorption Internal resorption Periapical cemento-osseous dysplasia None Hint 1 out of 22 Time's up
