medical MCQs – Page 153

Practise multiple-choice questions from medical for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

medical Mcqs

1. oral anatomy 2. microbiology 3. oral pathology and medicine 4. physiology 5. biochemistry 6. general anatomy 7. dental materials 8. pharmacology 9. pathology 10. oral histology

3041. Atypical or osteodentin is formed due to disturbance during____________?
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A. Histodifferentiation

B. Initiation

C. Apposition

D. Morphodifferentiation

3042. Dental papilla gives rise to_____________?
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A. Pulp & Periodontal ligament

B. Pulp & Dentin

C. Pulp only

D. All of the above

3043. Role of meckels cartilage in development of mandible__________________?
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A. It has a major role

B. It does not have any role

C. It has a minor role

D. None of the above

3044. The type of dentin that is formed prior to root completion______________?
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A. Inter tubular dentin

B. Secondary dentin

C. Circum pulpal dentin

D. Peritubular dentin

3045. Trauma or excessive occlusal forces causes_____________?
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A. Resorption of cementum

B. Hyperplasia of cementum

C. Hypertrophy of cementum

D. None of the above

3046. The disturbances occurred during Calcification stage of tooth development is seen in_____________?
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A. Supernumerary tooth

B. Peg laterals

C. Microdontia

D. Interglobular dentin

3047. Propriceptors are seen in all except______________?
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A. Pulp

B. TMJ

C. Skeletal muscle

D. None of the above

3048. Functional importance of maxillary sinus is______________?
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A. Protects the brain against exposure to cold air by arresting air in sinus temporarily

B. All of the above

C. Lightening of skull weight and production of bactericidal lysozyme to the nasal cavity

D. Resonance of voice and enhancement of faciocranial resistance to mechanical shock

3049. Inorganic content of cementum is_____________?
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A. More than that of enamel

B. Equal to that of bone

C. Less than bone

D. More than bone

3050. The dental pulp is derived form____________?
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A. Dental papilla

B. Dental sac

C. Stellate reticulum

D. Odontoblasts

3051. Any insult to cells in apposition stage result in______________?
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A. Osteodentin formation

B. Enamel hypoplasia

C. Anodontia

D. Hutchinsons incisor

3052. Sharpeys fibres are derived from_____________?
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A. Epithelial rests of malassez

B. Hertwigs root sheath

C. Dental follicle

D. Alveolar bone

3053. Cementum is_____________?
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A. None of the above

B. Vascular

C. Has blood supply initially only

D. Avascular

3054. Which of the following is true______________?
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A. Cementum contain type I collagen predominantly

B. All of the above

C. Cementodentinal junction is sometimes scallopes in deciduous teeth and smooth in permanent teeth

D. The uncalcified matrix of cementum is called cementoid

3055. The region in which cementum formation is most rapid is_____________?
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A. Middle

B. Interradicular

C. Apical

D. Coronal

3056. Haversion systems (osteons) are found primarily in the_________________?
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A. Spongy bone

B. Periosteum

C. Alveolar bone proper

D. Endosteum

3057. Butt joint in cementoenamel junctions seen is _________% of cases?
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A. 10%

B. 30%

C. 90%

D. 60%

3058. Narrowing of periodontal ligament in labially placed mandibular canine with age is due to_____________?
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A. Reversal of function of horizontal and oblique fibres

B. Gingival cysts formed from cell rests

C. Down growths of gingival epithelium

D. Due to deposition of cementum and bone

3059. Metalloprotienases are used in which stage of the amelogenesis_____________?
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A. Organising

B. Formative/ Secretory

C. Desmolytic

D. Protective

3060. Blood supply of ameloblast for most of its life cycle comes form_______________?
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A. Dental pulp

B. Dental papilla

C. Dental Sac

D. Reduced enamel organ

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