Medical Quiz

Tutor Oral Biology Quiz


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Which of the following is the type of bone presents in the furcation (interradicular area)?

A. cortical

B. Exophytic

C. Osteophytic

D. Cancellous


Mechanism of tooth shedding due to force mastication is all true EXCEPT

A. Force of mastication increases

B. Periodontal ligament able to withstand the forces

C. Resorption is inhibited

D. Periodontal ligament experience trauma and experience shedding


Which of the following cells are the predominant connective tissue cells of the periodontal ligament?

A. Cementoblasts

B. Fibroblasts

C. Osteoblasts

D. Cell rest of Malassez


What are the highest bacteria population at dorsum of tongue?

A. S.oralis

B. S.sangius

C. S.mutans

D. Actinomyces spp.


There are the early colonizers at our tooth surface, except

A. S.oralis

B. P.intermedia

C. S.sangius

D. gingivalis


How much force generated during the routine mastication of food?

A. 20N to 50N

B. 50N to 100N

C. 70 to 150N

D. 150N to 200N


Which of the following is Not the phase of physiological tooth movement?

A. Post-eruptive movement

B. Eruptive movement

C. Pre-eruptive movement

D. Para Eruptive movement


What is the Characteristic of parotid glands?

A. Mixed 60%

B. Mucous 5%

C. Serous 25%

D. Serous 60%


What are the Features of serous acini?

A. Watery consistency and rich with protein

B. Watery consistency and rich with carbohydrates

C. Viscous consistency and rich with protein

D. Viscous consistency and rich with carbohydrates


During remineralisation, there will be an increase in:

A. acidic environment in the mouth.

B. calcium ion withdraw from the dental enamel.

C. phosphate ion withdraw from the dental enamel.

D. absorption of calcium ion into the dental enamel.

E. absorption of hydrogen ion into the dental enamel.


“Local increase in tissue fluid pressure in the periapical region of the tooth cause the occlusal movement of the theory”

Which theories of eruption suits the statement above

A. Root formation theory

B. Pulp growth

C. Vascular pressure

D. Dental follicle theory


Tooth shedding is predominantly the

A. Physiologic loss of impacted teeth

B. Pathologic loss of non-vital primary teeth

C. Physiologic loss of permanent teeth

D. Physiologic loss of primary teeth


The periodontal ligament

A. Derives its blood primarily from the branches of vessels entering the pulp

B. Has a slow rate of turn over

C. Contains epithelial cells

D. Comprises primarily of type II collagen


Which of the following occurs during the early stage of eruption of the tooth

A. Maturation of enamel

B. Formation of dental sac

C. Differentiation of the stratum intermedium

D. Formation of stellate reticulum


Choose the correct statement about dental follicle theory

I. Giving rise to periodontal ligament

II. Playing important role in development of root

III. Acting as a course of odontoblasts

IV. Providing a pathway for osteoclasts which is required for bone remodelling

A. I and II only

B. II and III only

C. I, II and III

D. I, II and IV


Which of the following is not the principal fiber group of the periodontal ligament

A. Horizontal

B. Oblique

C. Alveolar crest

D. Trans septal


Non Oral manifestations in insulin deficiency     

A. pulpal calcification

B. xerostomia

C. periodontal problem

D. dental caries


A patient presented with 8mm overjet and 10% overbite. He also has a convex profile. Which of the following statements describe this patient?

A. Class I malocclusion on a Class I skeletal pattern

B. Class I malocclusion on a Class II skeletal pattern

C. Class II malocclusion on a Class I skeletal pattern

D. Class II malocclusion on a Class II skeletal pattern

E. Class II malocclusion on a Class III skeletal pattern


What is the largest portion in ductal system

A. Parotid

B. Submandibular

C. Sublingual


The predominant micro-organism in the first 24 hours of plaque formation are :

A. Vibrious

B. Filaments

C. Rods and Cocci

D. Cocci and filament


which of the following bones immediately surrounding to roots and giving support for insertion of periodontal fibers is most likely called

A. woven bone

B. spongy bone

C. supporting bone

D. alveolar bone proper


The space of incisal edge of the teeth during opening phase is

A. 12 to 14mm apart

B. 16 to 18mm apart

C. 18 to 20mm apart

D. 16 to 20mm apart


Hormone changes that will cause periodontal problem in menopause patients

A. Leptin

B. Androgen

C. Estrogen

D. Progesteron


A patient presented with a full permanent dentition, except for the third molars. On the right side of the dental arch, the mesiobuccal cusp of the upper first molar occludes into the embrasure between the lower first molar and second premolar. Classify the molar relationship.

A. Class I

B. Class II

C. Class II division I

D. Class III

E. Unclassified




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