Ish Shah
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unit 11 abnormalities in tooth morphology unit 12 unit 13 unit 14 unit 15

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Ish Shah
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Paediatric Dentistry PMU- Part 3 (units 11-15)

Question 1 of 98

1

Abnormalities in tooth morphology are alterations in number, shape, size and position of tooth

Select one of the following:

  • True
  • False

Explanation

Question 2 of 98

1

Tooth germination arises when two teeth develop from one tooth bud as a result of an abortive attempt of the single tooth bud to divide.

Select one of the following:

  • True
  • False

Explanation

Question 3 of 98

1

Fusion of teeth may occur only in upper teeth.

Select one of the following:

  • True
  • False

Explanation

Question 4 of 98

1

Dilaceration is a developmental disturbance in the number of teeth.

Select one of the following:

  • True
  • False

Explanation

Question 5 of 98

1

Microdontia is a developmental disturbance in the number of the teeth.

Select one of the following:

  • True
  • False

Explanation

Question 6 of 98

1

Macrodontia is where teeth are larger than usual size.

Select one of the following:

  • True
  • False

Explanation

Question 7 of 98

1

Supernumerary teeth are formed as a result of hyperplasia of dental lamina.

Select one of the following:

  • True
  • False

Explanation

Question 8 of 98

1

Fusion of teeth is a developmental disturbance in the:

Select one or more of the following:

  • Size of teeth

  • Shape of teeth

  • Position of teeth

  • Number of teeth

Explanation

Question 9 of 98

1

Cusp of carabelli is a characteristic morphological anomaly of the:

Select one or more of the following:

  • first permanent molar

  • first primary molar

  • second permanent molar

  • second primary molar

Explanation

Question 10 of 98

1

The tubercle of Zuckerkandl is a characteristic morphological anomaly of the:

Select one or more of the following:

  • premolars

  • first primary molar

  • first permanent molar

  • second primary molar

  • second permanent molar

Explanation

Question 11 of 98

1

Dilaceration is:

Select one or more of the following:

  • abnormal tubercle

  • dental root abnormality

  • angulation or a sharp curve in the root or crown of a formed tooth.

  • fusion of teeth

  • tooth gemination

Explanation

Question 12 of 98

1

microdontia is associated with:

Select one or more of the following:

  • ectodermal dysplasia

  • gigantism

  • mongolism

  • goltz syndrome

Explanation

Question 13 of 98

1

Hyperdontia is occurs most frequently in:

Select one or more of the following:

  • primary dentition

  • permanent dentition

  • premolars

  • incisors

Explanation

Question 14 of 98

1

Hyperdontia vera is a condition

Select one or more of the following:

  • of having supernumerary teeth from other dentition

  • of having formed tooth germ that cannot erupt in the mouth

  • of having supernumerary teeth from the same dentition

  • that occurs as a result of hyperplasia of dental lamina

Explanation

Question 15 of 98

1

most common causes of hypodontia are:

Select one or more of the following:

  • applied pressure that affects tooth bud

  • tumors

  • chronic intoxication

  • ectodermal dysplasia

Explanation

Question 16 of 98

1

diastema is:

Select one or more of the following:

  • relatively small deviation in the site of eruption of a tooth

  • the eruption of tooth far from its intended place

  • space between two upper incisors

  • space between any two teeth except for the central incisors.

Explanation

Question 17 of 98

1

Anatropism is:

Select one or more of the following:

  • turning of a tooth around its longitudinal axis

  • growth of a tooth root in an opposite upward pointing direction

  • condition in which the tooth remains in a position below the occlusal plane off the adjacent teeth

Explanation

Question 18 of 98

1

ankylosis of a tooth is an abnormality in the

Select one or more of the following:

  • number of the teeth

  • shape of the teeth

  • size of the teeth

  • position of the teeth

Explanation

Question 19 of 98

1

The right combination of statements about tooth impaction is :

1.it results from a failure of a tooth to erupt because of some physical barrier in its path of the eruption or an unusual position.
2.the lack of eruptive force can be the reason for tooth impaction.
3.impacted teeth have a delayed eruption time or are not expected to erupt.
4.caused by trauma.

Select one or more of the following:

  • 1,2,3

  • 2,3,4

  • 1,2,3,4

  • 1,3,4

Explanation

Question 20 of 98

1

The right combination of statements about the abnormalities in the shape of teeth is:

1.abnormalities may involve the corn, tooth or both
2. abnormalities in the shape include tooth fusion, tooth gemination, dliaceration, abnormal tubercle, root abnormarlities.
3. abnormalities in the shape include microdontia and macrodontia.
4. abnormalities in the shape can be caused by a trauma or inflammation.

Select one or more of the following:

  • 1 2 3

  • 1 2 4

  • 2 3 4

  • 1 2 3 4

Explanation

Question 21 of 98

1

The right combination of statements about fusion of teeth is:

1. abnormality may involve the crown, root or both
2. fusion of teeth occurs most commonly in primary dentition.
3.fusion of teeth occurs in primary and permanent
4.fusion of teeth arises when 2 teeth develop from 1 tooth bud as a result of an abortive attempt of the single tooth bud to divide
5.the tooth has a single wide crown and 2 separate roots or 2 separate crowns and single large root.

Select one or more of the following:

  • 1 3 5

  • 2 3 4

  • 2 4 5

  • 1 3 4

Explanation

Question 22 of 98

1

right combination of statements about root abnormalities is:

1. root abnormalities include supernumerary roots, abnormal root angulation, considerably longer or shorter root length than the average length
2. tooth has a single wide crown and two separate roots.
3.there are curved or branched root canals
4.dental radiographs identify abnormal roots

Select one or more of the following:

  • 1 2 3

  • 2 3 4

  • 1 3 4

  • 1 2 3 4

Explanation

Question 23 of 98

1

the right combination of statements about hypodontia is:

1. condition of presence of a higher than normal number of teeth
2.condition at which the patient has missing teeth as a result of the failure of them teeth to develop
3.only occurs in primary dentition
4.occurs more commonly in permanent dentition
5. absence of the wisdom teeth, upper lateral incisors, and second premolars is relatively common

Select one or more of the following:

  • 1 2 3

  • 2 4 5

  • 3 4 5

  • 1 2 4

Explanation

Question 24 of 98

1

right combination of statements about anodontia is:

1.describes a condition where the patient is missing up to five permanent teeth
2. found in upper and lower jaw
3.complete lack of teeth development
4. ectodermal dysplasia is a common cause
5.failure of tooth to erupt due to some physical barrier in its path of eruption

Select one or more of the following:

  • 1 2 3

  • 3 4

  • 3 4 5

  • 2 3 4

Explanation

Question 25 of 98

1

tooth impaction may be cause by factors such as :

1.mechanical obstacle
2. poor nutrition in children
3.malposition of the tooth germ
4. ectodermal dysplasia

Select one or more of the following:

  • 1 2

  • 2 3

  • 2 4

  • 1 3

Explanation

Question 26 of 98

1

Fill the blank spaces to complete the text.

abnormalities of teeth are classified according to their causes into:

a.
b.
c.

Explanation

Question 27 of 98

1

Fill the blank space to complete the text.

small addition cusp at the mesiopalatal line angle of the first permanent molar and the second primary molar is called the

Explanation

Question 28 of 98

1

Fill the blank space to complete the text.

a pronounced bulge on the medial side in the cervical third of the buccal surface of the first primary molar is called tubercle of

Explanation

Question 29 of 98

1

Fill the blank space to complete the text.

an angulation or a sharp bend or curve in the root or crown of a formed tooth is called

Explanation

Question 30 of 98

1

Fill the blank spaces to complete the text.

supernumerary teeth, smaller than the normal teeth, are with a and are called ''.

Explanation

Question 31 of 98

1

Fill the blank space to complete the text.

supernumerary tooth present in the midline of the anterior maxilla between two central incisors is called

Explanation

Question 32 of 98

1

Fill the blank spaces to complete the text.

hyperdontia is divided in two groups
1.
2.

Explanation

Question 33 of 98

1

Fill the blank spaces to complete the text.

hypodontia is divided in two groups
1.
2.

Explanation

Question 34 of 98

1

Fill the blank spaces to complete the text.

abnormalities in the positions of the teeth are:
1. tooth
2. tooth
3.
4. tooth
5. tooth
6.
7. tooth
8. tooth

Explanation

Question 35 of 98

1

Fill the blank spaces to complete the text.

Match the abnormalities in the shape of the teeth with their characteristics:
a. fusion of teeth
b. tooth germination
c. abnormal tubercles
d. dilaceration
e. tooth abnormalities

1. these abnormalities include supernumerary roots, abnormal root angulation, considerably longer or shorter tooth length than the average length
2. tooth has one main large crown partially separated with a cleft in its cervical third and a single root
3. fusion may involve the crown, root or both
4. angulation or a sharp bend or curve in the tooth or crown of a formed tooth
5. there are variations in the shape size and number of the tubercles
6. deviation from the normal axis of the apical part of the root by 20 degrees or more /90 degrees/
7. tubercle of carabelli
8. tubercle zuckerkandll
9. tooth has a single wide crown with 2 separate roots
10. it arises when 2 teeth develop from 1 tooth bud as a result of abortive attempt of a single tooth bud to divide
11. tooth has 2 separate crowns and a single large root.

Explanation

Question 36 of 98

1

Fill the blank spaces to complete the text.

Match the abnormalities in the size of teeth with their characteristics:
a. microdontia
b. macrodontia
1. teeth are larger than normal for that particular type of tooth
2. teeth are smaller than normal for that particular type of tooth
3. teeth are rudimentary in size and form with a peg shaped crown
4. oral manifestation of gigantism
5. oral manifestation of dwarfism
6. genetic disorder
7. oral manifestation of ectodermal dysplasia

Explanation

Question 37 of 98

1

Fill the blank spaces to complete the text.

match abnormalities in number of teeth with characteristics:

a. hyperdontia
b. hypodontia
c. anadontia
1. teeth may be morphologically similar to or dissimilar in size and shape compared with normal teeth
2. usually affects wisdom teeth and upper lateral incisors
3. condition at which the patient has few missing teeth as a result of the failure of those teeth to develop
4. condition of presence of a tiger than normal number of teeth
5. complete lack of teeth development
6. oral manifestation of ectodermal dysplasia

Explanation

Question 38 of 98

1

Fill the blank spaces to complete the text.

find the correspondence between the 2 columns:

a. pseudohyperdontia
b.hyperdontia vera
c.pseudohypordontia
d. hypodontia vera

1. oral condition characterised by having a supernumerary teeth from the same dentition
2. oral condition characterised by having a supernumerary teeth from the other mention- extra primary teeth in the permanent mention or extra permanent teeth in the primary dentition
3. abnormality occurs as a result of hyperplasia of dental lamina
4. tooth is prevented from erupting due to some physical barrier in its path of eruption or an unusual position
5. lack of some tooth development
6. pral manifestation of ectodermal dysplasia
7. due to the destruction of thee tooth bud because of some physical factors.

Explanation

Question 39 of 98

1

Fill the blank spaces to complete the text.

Match the abnormalities in the position of teeth with their characteristics:

a. tooth transposition
b. dystopia/ displacement
c. diastema
d. tooth rotation
e. dens invaginatus
f. anatropism
g. tooth aberration
h. tooth impaction
i. ankylosed teeth
1. tooth is presented from erupting due to some physical barrier in its path of eruption or an unusual position
2. condition of an invagination of calcified layers of tooth into the body of the tooth
3. anomaly where two adjacent teeth have changed their positions in the dental arch
4. tooth erupts in an outward position of the dental arch
5. space between 2 upper incisors
6. growth of tooth root is in complete opposite upward pointed direction
7. tooth is located in its correct position in the dental arch but rooted around longitudinal axis
9. condition of an incomplete eruption of a tooth because of the fusion of cementum with surrounding bone and the retained tooth remains in a position below the occlusal plane of the adjacent teeth
9.toth remains stick in the bone and no tooth movements occur
10. canines and first premolars are most often involved
11. 2 types of abnormality- heterotopia and ectotopia
12. roared teeth are single rooted teeth
13.these teeth have a delayed eruption time
14. it may be sure to a lack of eruptive force

Explanation

Question 40 of 98

1

There are genetic endogenous and exogenous factors in the etiology of dental dysplasia.

Select one of the following:

  • True
  • False

Explanation

Question 41 of 98

1

Structural abnormalities of teeth occur as a result of disturbance of histogenesis of dental hard tissues during the different stages of tooth development.

Select one of the following:

  • True
  • False

Explanation

Question 42 of 98

1

Hypoplasia is a disturbance of mineralization which results in a normal process of organic matrix production and an insufficient mineralisation.

Select one of the following:

  • True
  • False

Explanation

Question 43 of 98

1

Dyschromia refers to an alteration of the colour of a tooth

Select one of the following:

  • True
  • False

Explanation

Question 44 of 98

1

Dysplasiae dentales congenitae, involving permanent teeth occur as a result of disease during pregnancy

Select one of the following:

  • True
  • False

Explanation

Question 45 of 98

1

Taurodontism occurs in multirooted teeth - permanent molars and premolars

Select one of the following:

  • True
  • False

Explanation

Question 46 of 98

1

General diseases in children up to three years of age result in structural abnormalities in permanent teeth

Select one of the following:

  • True
  • False

Explanation

Question 47 of 98

1

Dysplasia is

Select one of the following:

  • root abnormality

  • crown abnormality

  • structural abnormality in the formation of enamel, dentin and cementum

  • abnormalirty in the number of teeth

Explanation

Question 48 of 98

1

Hypoplasia is a result of disturbance of the

Select one of the following:

  • mineralisation

  • organic matrix formation

  • maturation of dental hard tissues

Explanation

Question 49 of 98

1

Hypomaturation is a result of disturbance of the

Select one of the following:

  • maturation of hard dental tissues

  • organic matrix formation

  • mineralization

  • pigmentation of tooth

Explanation

Question 50 of 98

1

disturbances that occur between the third and sixth month of pregnancy result in

Select one of the following:

  • hypomineralisation of primary teeth

  • hypoplasia of permanent teeth

  • hypoplasia of primary teeth

  • hypomaturation

Explanation

Question 51 of 98

1

Disturbances that occur between the sixth and ninth month of pregnancy result in

Select one or more of the following:

  • hypoplasia of primary teeth

  • hypoplasia of some permanent teeth

  • hypomineralisation of primary teeth

  • hypomaturation

Explanation

Question 52 of 98

1

Inherited disorders of tooth development result from

Select one of the following:

  • environmental factors

  • genetic mutations

Explanation

Question 53 of 98

1

Characteristics of Amelogenesis imperfecta, hypoplastic type are:

Select one or more of the following:

  • Abnormal yellow colour of tooth

  • hypomineralised enamel

  • lines, pits and gtooves in the whole enamel surface or in certain areas

  • enamel loss and exposure of underlying dentin

  • inadequate formation of enamel rods without disturbances in the enamel mineralization

Explanation

Question 54 of 98

1

characteristics of amelogenesis imperfecta, hypomaturation type are

Select one or more of the following:

  • normal enamel thickness

  • enamel loss and exposure of underlying dentin

  • varied degrees of hypomineralisation

  • colour varies from yellow to opaque white

  • usually only one tooth is affected

Explanation

Question 55 of 98

1

characteristics of coronal dentin dysplasia are

Select one or more of the following:

  • the affected teeth are slightly amber in colour

  • it usually affects primary teeth

  • both primary and permanent dentitions are equally affected

  • reduced number of dentinal tubules with an irregular course

Explanation

Question 56 of 98

1

characteristics of radicular dentin dysplasia are

Select one or more of the following:

  • it affects only primary teeth

  • it affects both primary and permanent dentitions

  • short, blunted and malformed roots

  • the affected teeth are slightly amber in colour

  • normal colour of teeth

Explanation

Question 57 of 98

1

choose incorrect statement about taurodontism

Select one of the following:

  • affects permanent premolars and molars

  • affects only primary teeth

  • associated with apical displacement of the furcation area

  • associated with enlargement of pulp chamber

  • associated with chromosome abnormalities

Explanation

Question 58 of 98

1

Characteristics of dysplasiae dentales congenitae are

Select one or more of the following:

  • it affects only permanent teeth

  • affects primary and some permanent teeth

  • teeth are described as ghost teeth

  • a result of disturbances during pregnance

Explanation

Question 59 of 98

1

the right combination of statements about the congenital hypoplasia of enamel is:
1.all of the primary teeth are affected
2.all of the permanent teeth are affected
3.its a result of diseases during pregnancy
4.the teeth are of normal shape
5.visible defects in enamel are present on eruption of tooth

Select one of the following:

  • A. 1,2,3

  • B. 1,3,5

  • C. 3,4,5

  • D. 1,2,4,

Explanation

Question 60 of 98

1

the right combination of statements about congenital hypomineralization is:
1. it is a result of disturbances that occur between the sixth and ninth month of pregnance
2. all primary teeth affected
3. all permanent teeth affected
4. defects are located at sites of predilection for caries
5. the teeth are of normal shape, size and colour, whereas enamel tends to wear away from underlying dentin

Select one of the following:

  • A. 1,2,3

  • B. 2,3,4

  • C. 2,4,5

  • D. 1,2,5

Explanation

Question 61 of 98

1

the right combination of statements about enamel hypoplasia due to congenital syphilis is
1. teeth are of normal shape
2. shape and structure of teeth are irregular
3. the permanent upper incisors have a v-notch on the center of the incisal edge and a tapered shape from the cervix to the incisal edge and appear as screwdrivers/ Hutchinson's teeth
4. pigmentation of teeth
5. an altered crown shape of the first permanent molars with a narrow occlusal table where enamel appears to be arranged in an agglomerate mass of globules

Select one of the following:

  • A. 1,2,3,

  • B. 2,3,5,

  • C. 3,4,5,

  • D. 2,3,4,

Explanation

Question 62 of 98

1

the right combination of statements about Dental fluorosis is:
1. the origin of dental fluorosis is supposed to be genetic
2. it is an acquired dysplasia of permanent teeth in children who are excessively exposed to high concentrations of fluoridehifher than 1,5 mg/l/ during the first 7 years of life
3. the fluoride ions directly affect ameloblasts
4. the dean index classifies fluorosis in two types
5. the severity od dental flurosis depends on the amount and duration of fluoride exposure anf the age of teh chils

Select one of the following:

  • A - 2,3,5

  • B - 1,2,3,

  • C- 3,4,5,

  • D - 2,3,4,

Explanation

Question 63 of 98

1

the right combination of statements about turners hypoplasia
1. there are changes in the shape of the tooth crown
2. it is acquired dysplasia
3. there is a colour change of the tooth crown
4. turners hypoplasia is due to disruption in the process of enamel matrix formation
5. turners hypoplasia usually affects only one permanent successor of primary tooth

Select one of the following:

  • A - 1,2,3

  • B - 2,3,4

  • C - 1,3,4

  • D - 1,2,3,4,5

Explanation

Question 64 of 98

1

Fill the blank spaces to complete the text.

The factors in the etiology of dental dysplasia are and

Explanation

Question 65 of 98

1

Fill the blank spaces to complete the text.

3 endogenous factors in the etiology of acquired dental dysplasia: , ,

Explanation

Question 66 of 98

1

Fill the blank spaces to complete the text.

the affected teeth in a patient with rickets in the first year of life are , and

Explanation

Question 67 of 98

1

Fill the blank spaces to complete the text.

the classification of dental dysplasia according to etiological factors is , and

Explanation

Question 68 of 98

1

Fill the blank spaces to complete the text.

types of dysplasiae dentales congenitae are , ,

Explanation

Question 69 of 98

1

the statements about amelogenesis imperfecta that are CORRECT are

Select one or more of the following:

  • 1- it usually affects only a single or permanent tooth

  • 2- the four main AI types are hypoplastic, hypomaturation, hypocalcified and hypoplastic/hypomaturation

  • 3-it may solely affect enamel or may be an oral manifestation of generalised hereditary diseases

  • 4-it is due to many inherited defects of enamel formation that affect the quantity and quality of enamel

  • 5- it is an autosomal disorder of tooth structure characterized by disturbance of dentin

Explanation

Question 70 of 98

1

the statements about dysplasiae dentales acquisitae that are CORRECT are

Select one or more of the following:

  • 1- a number of different environmental factors give rise to this condition

  • 2- they affect more often primary teeth

  • 3- they affect primary and permanent

  • 4-they are associiated with distruption in the processs of mineralisation and maturalion and a normal process of organic matric producion of pprimary teeth

  • 5- permanent teeth can be affected by all acquired types of dysplasia- hypoplasia, hypomineralisation, hypomaturation and pigmentation

Explanation

Question 71 of 98

1

Fill the blank spaces to complete the text.

match the types of amelogenesis imperfecta with their characteristics:
A- hypoplastic type ( , , , )
B- Hypomaturation and hypocalcification ( , , , )

1- soft, rough, opaque white to yellow brown enamel surface
2- hard, yellowish brown enamel surface
3- lines, pits or grooves in the whole thin enamel or certain areas
4- affects all the teeth in primary and permanent
5- teeth erupt with normal size and shape
6- enamel loss and exposure of underlying dentin
7- small teeth, lack proximal contact

Explanation

Question 72 of 98

1

Fill the blank spaces to complete the text.

Match the type of dentinogenesis imperfecta with their characteristics:
A- coronal dysplasia ( )
B- Radicular (, )
C- Fibrous ( , )
D- Hereditary opalescent dentin ( )
E- Taurodontism ( , )

1- radiodense material of fibrotic dentin found in pulp chamber and canals
2- disorders affect radicular dentin
3- affects primary molars and premolars
4- teeth are of normal shape and colour5
5- affected teeth are amber in colour
6- teeth have normal colour, short, blunted, malformed roots
7- affected teeth are blue-grey
8- enlargement of pulp chamber due to apical displacement of furcation area

Explanation

Question 73 of 98

1

Fill the blank spaces to complete the text.

match types of dysplasia with their characteristics:
A- Enamel hypoplasia due to congenital syphilis ()
B- dental fluorosis (
C- Turners hypoplasia

1-usually affects only a single permanent successor of primary tooth
2- fluoride ions directly affect ameloblasts
3- crowns of first permanent molars irregular and enamel of occlusal surface arranged in agglomerate mass or globules
4- it is dysplasia of permanent teeth in children who are excessively exposed to high concentration of fluoride
5- hutchinsons teeth

Explanation

Question 74 of 98

1

The structures of the oral cavity work together to maintain the physiological integrity of the oral cavity

Select one of the following:

  • True
  • False

Explanation

Question 75 of 98

1

Oral ecology is a science that studies only the interrelationships between organisms in the oral cavity

Select one of the following:

  • True
  • False

Explanation

Question 76 of 98

1

Anabolism is the set of metabolic pathways that breaks down molecules into smaller units to release energy

Select one of the following:

  • True
  • False

Explanation

Question 77 of 98

1

str. mutans, str. salivarius, str. sanguis are scidogenic bacteria which metabolize the carbohydrates and produce organic acids, which results in a decreased overall pH within the dental plaque

Select one of the following:

  • True
  • False

Explanation

Question 78 of 98

1

glycolysis is a main metabolic pathway of carbohydrate metabolism in bacteria

Select one of the following:

  • True
  • False

Explanation

Question 79 of 98

1

fungal species make up 98% of the total oral flora during first year of life

Select one of the following:

  • True
  • False

Explanation

Question 80 of 98

1

The balance of oral microflora can shift due to changes in

Select one or more of the following:

  • salivary content

  • environmental temp

  • phsyiological status of the patient

  • age of the child

  • genetic info

Explanation

Question 81 of 98

1

The spherical shaped bacteria are called

Select one or more of the following:

  • cocci

  • bacilli

  • spirilla

  • spirochaetes

Explanation

Question 82 of 98

1

rod- shaped or cylindrical bacteria are called

Select one or more of the following:

  • cocci

  • bacilli

  • spirochaetes

  • spirilla

Explanation

Question 83 of 98

1

the microorganisms in the oral cavity include

Select one or more of the following:

  • bacteria

  • ptotozoa

  • fungi

  • all

Explanation

Question 84 of 98

1

entamoeba gingivalis and Trichomonas tenax are

Select one or more of the following:

  • bacteria

  • fungi

  • protozoa

  • virus

Explanation

Question 85 of 98

1

the characteristics of fungi include

Select one or more of the following:

  • thick cell wall

  • do not have defined nucleus

  • they are capable of rearing a spawn in the mouth cavity

  • they reproduce by budding

Explanation

Question 86 of 98

1

Gram positive genera are

Select one or more of the following:

  • streptococcus

  • bacteriodes

  • haemophilius

  • staphylococcus

Explanation

Question 87 of 98

1

the streptococci are most frequently isolated from the

Select one or more of the following:

  • tongue

  • gingiva

  • carious lesions

  • oral mucosa

Explanation

Question 88 of 98

1

commensalism is

Select one or more of the following:

  • a class of relationship between two organisms where one organism benefits without affecting the other

  • a class of relationship between two species which interact but do not affect each other

  • a biological phenomenon indicating growth or turning movement of a biological organism, usually a microorganism, in response to a stimulation by drugs

  • a non mutual relationship between organisms of different species where one organism, the parasite, benefits at the expense of the other, the host

Explanation

Question 89 of 98

1

protein synthesis in microorganisms occurs in the

Select one or more of the following:

  • ribosomes

  • cytoplasm

  • mitochondria

  • nucleus

Explanation

Question 90 of 98

1

bacteria with strong acidogenic abillity are

Select one or more of the following:

  • streptococcus

  • staphylococcus

  • spirohaetes

  • actynomyes

  • lactobacillus

  • candida

Explanation

Question 91 of 98

1

anaerobic bacteria appear in the oral cavity of a newborn child

Select one or more of the following:

  • after first year of life

  • after eruption of first teeth

  • after the age of 2

  • after the age of 3

Explanation

Question 92 of 98

1

the bacterial flora of the oral cavity includes
1- streptococcus salivarius
2-entamoeba gingivalis
3-streptococcus mutans
4-fusobacterium
5-candida albicans
6-actinomycetes odontolyticus
7- trichhomonas tenax

Select one or more of the following:

  • a- 1, 2, 3, 4

  • B- 3, 4, 5, 6

  • c- 4, 5, 6 ,7

  • d- 1,3,4,6

Explanation

Question 93 of 98

1

functions of salivary mucin are:
1- it is responsible for salivary viscocity
2- it is responsible for the transport of iron ions in saliva
3- it coats the mucosal surface and acts as a barrier in preventing bacterial access to the epithelial cells of oral mucosa
4- it slows down the growth of candida

Select one or more of the following:

  • A/ 1, 3

  • B/ 1,2

  • c/ 3, 4

  • d/ 2, 4

Explanation

Question 94 of 98

1

functions of antimicrobial factors IgM igA igG are:
1- they provide protection of the gums against vacterial invasion
2- they provide rotection of the tooth surface against bacterial infection
3- they are specific antibidoes which are produced in response to specific antigen
4- they simulate the microbial growth

Select one or more of the following:

  • A/ 1,2

  • B/ 1, 3

  • C/ 3, 4

  • D/ 2,4

Explanation

Question 95 of 98

1

the bacterial virulence factors that maintain oral eubiosis include:
1- adhesion
2- coaggregation
3- adsorption
4- absorption

Select one or more of the following:

  • A/ 1, 2 , 3

  • B/ 2, 3, 4

  • C/ 1, 2, 4

  • D/ 1, 2, 3, 4

Explanation

Question 96 of 98

1

the exogenous factors that maintain oral eubiosis include:
1- diet
2- salivary flow
3- oral hygiene
4- medication and diseases
5- dental status

Select one or more of the following:

  • A/ 1, 2 , 5

  • B/ 2, 3 , 4

  • C/ 1, 3 , 4

Explanation

Question 97 of 98

1

Fill the blank spaces to complete the text.

Match the items from the first column with related items listed in the second column.
A. Bacteria
B. Protozoa
C. Fungi

1- they have double-stranded DNA and a nucleus that is not separate from the rest of the cell by a membrane
2- they range in size from one to several millimetres in length
3- they are capable of rearing a spawn in the mouth cavity
4- they have the ability to move independently
5- they reproduce by budding

Explanation

Question 98 of 98

1

Fill the blank spaces to complete the text.

match the type of relationship between microorganism with the accurate definition
A. Neutralism -
B. Symbiosis -
C. commensalism -
D. Biotropism-
E. Parasitism-

1- a relationship between two different species in which both benefit from the interaction
2- a class of relationship between two organisms where one organism benefits without affecting the other
3- a non mutual relationship between organisms of different species where one organism, the parasite, benefits at the expense of the other, the host
4- a biological phenomenon, indicating growth or turning movement of a biological organism, microorganism in response to stimulation of drugs
5- a class of relationship between two species which interact but do not affect each other

Explanation

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