oral pathology and medicine Mcqs
451. The most common bone cancer is______________?
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A. Squamous cell carcinoma

B. Multiple myeloma

C. Metastatic bone cancer

D. Osteosarcoma

452. Amelogenesis imperfecta is a disorder of_____________?
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A. Endoderm

B. Mesoderm

C. Ectoderm

D. Ecto and Mesoderm

453. In Hypodontia, the most commonly affected tooth is_______________?
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A. Permanent second premolar

B. Permanent third molar

C. Permanent Canine

D. Permanent lateral incisor

454. A girl suffering from browing of teeth, wearing of enamel but not cavitory, OPG shows obliteration of pulp with narrowing of canal & deposition of secondary dentin, she gave the history that out of her 4 brothers 2 are suffering from the same disease, She is suffering from_______________?
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A. Odontodysplasia

B. melogenesis imperfecta

C. Flurosis

D. Dentinogenesis imperfecta

455. Biochemical abnormality associated with osteogenesis imperfecta is increase in______________?
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A. Alkaline phosphatase

B. Acid phosphatase

C. Bicarbonate ion

D. Phosphorylase enzyme
456. Persons with the greatest risk of oral cancer_______________?
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A. Have a poor oro-dental hygiene, nutritional deficiencies and are chronic alcoholics

B. Are middle aged have a poor oro-dental hygiene and regularly use tabacco

C. Are young, have poor oro-dental hygiene and are heavy smokers

D. Are old, chronic alcoholics and regularly and regularly use tobacco
457. Which of the following organisms is found in deep carious lesions rather than in incipient lesions ?
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A. Bateroides

B. Lactobacilli

C. Veillonella

D. Streptococci

458. Of the following which is most common disorder causing pain about the masticatory apparatus including the TMJ_____________?
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A. Myofacial pain dysfunction syndrome

B. Traumatic arthritis

C. Trigeminal neuralgia

D. Degenerative arthritis

459. Least cariogenic among these______________?
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A. Fructose

B. Sucrose

C. Cooked starch

D. Raw starch
460. Brittle bone syndrome is caused by______________?
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A. Increase osteoclastic activity

B. Increase fibroblastic activity

C. Polymerisation of collagen

D. Improper synthesis of procollagen
461. The inheritance pattern of dentinogensis imperfecta is______________?
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A. Recessive

B. Autosomal dominant

C. X-linked recessive

D. Homozygous

462. Ectopic sebaceous glands in the mouth are called________________?
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A. Fordyce spots

B. Lingual verices

C. Linea alba buccalis

D. Hecks disease
463. Peripheral giant cell granuloma occurs most commonly on the_______________?
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A. Alveolar ridge

B. Floor of the mouth

C. Palate

D. Gingiva
464. Lactobacilli are numerous in caious lesions because they______________?
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A. Are the main causative agent

B. Can attack to smooth enamel surfaces

C. Are secondary invaders

D. Can produce insoluble extracellular polysaccharides

465. In a caries-free individual the saliva has_____________?
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A. Independent of buffering capacity for acids

B. Medium buffering capacity for acids

C. High buffering capacity for acids

D. low buffering capacity of acids

466. For a bacterium to be seriously considered in the etiology of dental caries, it must______________?
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A. Produce extracellular amylopectins

B. Be lethal for gnotobiotic animals

C. Produce intracellular dextrans

D. Exist regularly in the dental plaque
467. Mobility of teeth in carcinoma of Maxillary sinus is due to involvement by tumor of_________________?
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A. Roof of the sinus

B. Posterior wall of the sinus

C. Floor of the sinus

D. Anterior wall of the sinus

468. Which of the following is not hereditary________________?
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A. Dentinogenesis imperfecta

B. Amelogenesis imperfecta

C. Cleidocranial dysostosis

D. Regional odontodysplasia

469. Which of the following dental sequel is likely in child with a history of generalized growth failure (failure to thrive) in the first 6 month of life_______________?
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A. Retrusive Mandible

B. Retrusive maxilla

C. Dentinogenesis imperfecta

D. Enamel hypoplasia
470. Chemico-parasitic theory of dental caries is proposed by______________?
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A. Miller

B. G.V black

C. Schwartz

D. Gottlieb

471. Prolonged administrator of broad spectrum antibiotics results in the formation of_______________?
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A. Geographic tongue

B. Median rhomboid glossitis

C. Black hairy tongue

D. Fissured tongue

472. Globulamaxillary cyst is______________?
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A. A cyst present in the incisive canal

B. Soft tissue cyst present often between maxillary Lateral incisor and cuspid teeth

C. Often present between incisor and cuspid teeth but is a bone cyst

D. A cyst present between the midline of the palate

473. Hairy tongue is characterized by____________?
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A. Hypertrophy of filiform papillae

B. Hypertrophy of fungiform papillae

C. Hypertrophy of circumvallate papillae

D. Hypertrophy of foliate papillae

474. Pain, muscle tenderness, clicking or popping noise in T.M joint and limitation of jaw motion are the four cardinal signs and symptoms of_____________?
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A. Ostearthritis

B. Costens syndrome

C. Myofacial pain dysfunction syndrome

D. Traumatic arthritis of T.M J

475. Cavity formation in a tooth, due to dental caries is due to______________?
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A. Mastectomy force and unrelated to the extent of carious process

B. Destructive potential of streptococcus mutans

C. Lateral spread of caries along DE junction and weakening of the outer covering enamel

D. Destructive potential of lactobacillus acidophilus

476. Tumors metastatic to the jaw bones are most likely to be found in the _________________?
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A. Maxillary tuberosity

B. Mandibular condyle

C. Anterior maxilla

D. Posterior moral region
477. Clear cells are seen in__________________?
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A. Chondrosarcoma

B. Ewings sarcoma

C. Fibrosarcoma

D. Osteosarcoma

478. Which of the following conditions is least likely to present as an eccentric osteolytic lesion ______________?
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A. Fibrous cortical defect

B. Aneurysmal bone cyst

C. Simple bone cyst

D. Giant cell tumour

479. Tumor represented T2 N2 M0 is classified as_______________?
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A. Stage II

B. Stage I

C. Stage III

D. Stage IV
480. Estesin pearls are cysts that arise from_________________?
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A. Connective tissue of the mucosa

B. Squamous tissue of the mucosa

C. Rests of malassez

D. Dental lamina
481. A dens in dente is usually caused by_______________?
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A. Denticle formation within the pulp tissue

B. An abnormal proliferation of pulp tissue

C. A supernumerary tooth bud enclaved within a normal tooth

D. A deep invagination of the enamel organ during formation
482. A 10-years-old child presents with anemia and recurrent fractures. The X-ray shows diffuse hyper density of bone The diagnosis is most likely to be______________?
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A. Osteochondroma

B. Osteogenesis imperfecta

C. Osteopetrosis

D. Hyperparathyroidism

483. On biopsy report of CGCG on the basis of histologically & morphological similarities differential diagnosis is made between____________?
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A. Fibrous dysplasia

B. Osteitis deformans

C. Hyperthyroidism

D. Hyperparathyroidism
484. Starch is considered to be less cariogenic than monosaccharides and disaccharides because it_______________?
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A. Does not diffuse through plaque

B. Raises the PH in the oral cavity

C. Enhances remineralisation

D. Is rapidly hydrolysed in the mouth

485. Hypodontia is mainly found in all except___________?
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A. Cleidocranialdysostosis

B. Papillion levefre syndrome

C. Osteopetrosis

D. Ectodermal dysplasia

486. Teeth that erupt with in 30 days of birth are called________________?
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A. Prenatal teeth

B. Natal teeth

C. Neonatal teeth

D. Primary teeth

487. Small palpable mass elevated above the epithelial surface is_____________?
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A. Plaque

B. Macule

C. Papule

D. Vesicle

488. Which of the following has the potential of undergoing Spontaneous malignant transformation _____________?
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A. Osteogenesis imperfecta

B. Pagets disease of bone

C. Osteomalacia

D. Albrights syndrome

489. The condition involved with an unerupted tooth or impacted tooth is _________________?
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A. Dentigerous cyst

B. All of the above

C. Adenomatoid odontogenic tumor

D. Mural ameloblastoma

490. Dental caries is associated with_____________?
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A. Streptococcus mutans

B. Streptococcus anginosus

C. Streptococcus bovis

D. Streptococcus agalactiae

491. Bifid tongue a congenital anomaly occurs due to non-fusion of____________?
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A. Tuberculum impar and lateral lingual swellings

B. Some of the above

C. Hypobranhiral eminence and tuberculum impar

D. The two lateral lingual swellings
492. A 4-year old child has less number of teeth and lateral incisors with bifurcated roots with two root canals is called_____________?
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A. Concrescence

B. Dilaceration

C. Fusion

D. Gemination

493. Which tooth in the permanent dentition is the most susceptible to dental caries ?
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A. Maxillary 1st premolar

B. Mandibular 1st molar

C. Mandibular 2nd molar

D. Maxillary 2nd molar

494. Early invading bacteria in carious lesions are called___________?
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A. Pioneer bacteria

B. Anaerobic bacteria

C. Microcosm

D. Advancing bacteria

495. The corrct order of microscopic zones of dentinal caries starting from the D.E junction is_______________?
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A. Zone of sclerosis, backterial invasion, decalcification zone

B. Decalcification zone, zone of scierosis, backterial invasion

C. Zone of sclerosis, decalcification zone, bacterial invasion

D. Bacterial invasion, decalcification zone, zone of sclerosis
496. Tobacco usage has been associated with_____________?
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A. None of the above

B. Hyperkeratosis

C. Erythema

D. Ulceration

497. A 3-year old patient reports of painless progressive bilateral facial swellings. The tentative diagnosis is______________?
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A. Monostotic fibrous dysplasia

B. Ployostotic fibrous dysplasia

C. Cherubism

D. Central giant cell granuloma

498. The prbable reasons for a high incidence of dental caries in the teenage population relates most directly to______________?
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A. Carelessness in oral hygiene habits

B. Negligence in visiting the dentist

C. Rapid growth

D. Frequency of sucrose intake
499. A bony hard asymptomatic swelling found on the midline of the hard palate that appears radiopaque on a radiograph is most likely a__________________?
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A. Boney cyst

B. Myxoma

C. Odontoma

D. Torus palatinus
500. Normal serum, Ca nd alkaline PO4 are in________________?
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A. Pagets disease

B. Hypothyroidism

C. Hyperparathyroidism

D. Cherubism