411. Best way to differentiate a periapical cyst and a perapical granuloma is:__________?
A. Radiographically
B. Histologically
C. Clinically
D. None of the above

412. Which of the following differentiates between condensing osteitis and benign cementoblastoma?
A. Condensing osteitis is associated with vital teeth where as cementoblastoma is associated with non-vital teeth
B. In condensing osteitis radiopacity is attached to tooth where as in cementoblastoma it is not
C. Cementoblastoma is associated with vital tooth where as condensing osteitis is associated with non-vital tooth
D. In cementoblastoma radiopacity is attached to tooth where as in condensing osteitis it is not

413. Constant feature associated with a radicular cyst
A. An impacted tooth
B. A missing both
C. A non-vital tooth
D. An anomalous tooth

414. The caries of enamel surface leads to accentuation of:__________?
A. Incremental lines of retzius
B. Perikymata
C. Imbrication lines of pickerill
D. Wickham’s striae

415. Odontogenic epithelium responsible for the formation of dental cyst is:___________?
A. Cell rests of sierra
B. Enamel organ
C. Reduced enamel epithelium
D. Cell rests of malassez

416. Which is not true of Ludwig’s angina?
A. Usually arises from an infected molar
B. involves submandibular space
C. May need emergency tracheostomy
D. None of the above

417. Reversible pulpitis change to irreversible pulpitis primarily because of:__________?
A. Vascular strangulation
B. Reduced host resistance
C. Invasion of microorganisms
D. An increase in microbial virulence

418. Pain due to acute irreversible pulpitis is:____________?
A. Spontaneous
B. Sharp- shock like
C. Lasting for short time
D. Continuous

419. A person experiences throbbing pain at night. It is due to:__________?
A. Acute Pulpal degeneration
B. Acute periodontal abscess
C. Chronic pulpitis
D. Cellulitis

420. An asymptomatic tooth has deep has deep caries on occlusal surface. Radiograph shows radiopaque mass at apex of the tooth: this mass is most likely to be:____________?
A. Cementoma
B. Condensing Osteitis
C. Chronic apical periodontitis
D. Acute apical periodontitis