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Oral Pathology > Developmental Disturbances > Flashcards

Developmental Disturbances Flashcards

1
Q

Inherited disorder ave

A

Caused by abnormality in genetic makeup

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2
Q

Congenital disorder are

A

’ Present at birth
May be inherited or developmental cause of congenital disorder is unknown

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3
Q

Disorders are due to

A

Abnormalities in differentiation of dental Lamina and tooth germs

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4
Q

8 anomalies of teeth

A

No. Of teeth
Size of teeth
Form of teeth (shape )
Tooth structure ] abnormalities in histo differentiation

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5
Q

Anodontia is

A

Complete congenital absence of teeth in one or more dentition. Failure of teeth to develop (same as genesis
Of teeth)

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6
Q

Hypodontia is

A

Having les than 6 congenitally missing teeth (partial anodontia)

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7
Q

Oligodontia is

A

Subdivision of hypodontia ‘ having 6 or more congenitally missing teeth

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8
Q

Hyper dontia is also called

A

Polydontia - presence of extra teeth
Maybe single ol multiple as in
Cleidocranial dysplasia

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9
Q

Anodontia is

A

Rare condition - mutation is some of regulatory control genes
When it occur it is usually a part of craniofacial and developmental syndromes like ectodermal dysplasia syndrome

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10
Q

Ectodermal dysplasia is hereditary or congenital

A

Hereditary

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11
Q

5 clinical features of ectodermal dysplasia syndrome

A

Hypotrichosis (lack of hair)
Dental anomalies ( anodontia, hypodontia, oligodontia)
Hypohydrosis and anhydrosis (dryness of skin)
Oncyhodysplasia (abnormal nails)
Depressed nasal brush frontal bossing prominent ears parting averted lips

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12
Q

Dental anomalies may include

A

Anodontia hypodontia taurodontism of deciduous molars
Permanent dentition limited to
Maxilla- CI first molar and canine
Mandible- canine first pm and first molar
Deficient alveolar ridges associated with hypodontia
Underdeveloped jaws
Malformed teeth
Cleft lip palate
Absence of lingual frenulum

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13
Q

Hypodontia is more or less Mormon than anodontia

A

More common

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14
Q

Hypodontia asssociated with

A

Ectodermal dysplasia condition

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15
Q

Genes affected in hypodontia

A

Pax9 and MSX1 genes transcription factors as chromosome 14 involved
Genes encodes transcription factors that function in development of derivatives of pharyngeal pouch (teeth, skeleton, thymus)

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16
Q

Teeth most commonly affected in hypodontia is

A

Permanent upper lateral incisor lower 2nd pm and 3rd molars are missing
In deciduous dentition central incisor are commonly affected misssing with failure of permanent successor formation
Hypodontia in deciduous dentition is uncommon

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17
Q

Supernumerary teeth or hyperdontia is associated with what defects

A

Cleft palate, cleidocranial dysplasia and gardners syndrome

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18
Q

Hyperdontia may develop in any

A

Tooth bearing area but occur most frequently in
Anterior and molar region of maxilla
Followed by premolar region of mandible

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19
Q

Hyperdontia is more common in

A

Females

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20
Q

Hyperdontia can arise problems that are

A

May prevent eruption cause malposition or resorption of adjacent teeth
Majority have conical peg shape

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21
Q

Cleidocranial dysplasia is inherited as

A

Autosomal dominant trait chromosome 6 the gene encodes (BFA_ protein necessary for skeletal development

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22
Q

Cleidocranial dysplasia 5 clinical features

A

Aplasia of clavicles
Delayed ossification of flatness
Enlargement of cranium
Short stature
Multiple extra teeth
Bulgin Calvaria
Depressed nasal bridg
Hypoplastic maxillary and zygomatic bones
Persistence of primary dentition
Posterior cross bite class 3 malocclusion

23
Q

Supernumerary teeth problems are

A

Crowding
Improper cleaning
Caries

24
Q

Natal means

A

Present at birth

25
Q

Neonatal teeth means

A

Present within 30 days of birth

26
Q

95% of natal teeth are prematurely erupting

A

Primary central incisors

27
Q

Size of teeth and jaws are controlled by

A

Genetic and environmental factors

28
Q

Microdontia of whole dentition may be seen in

A

Down syndrome
Congenital heart disease

29
Q

Disturbance of tooth may involve crown commonly seen in

A

Maxillary permanent lateral incisors (peg shape)
Pm and molars may show an increase or decrease in no of cusps
Pulp chamber may show variation in size

30
Q

Dens in dente ( dens invaginatus) is

A

Distortion of enamel organ
Aberrant crown forms in which there us commonly a communication btw surface of crown and pulp chamber

31
Q

Dens in dente type 1 is

A

Invaginatus lined with enamel inside crown which leant extend beyond cej

32
Q

Dens in dente type 2 means

A

Invaginatus lined with enamel up to inside of root beyond cej

33
Q

Dens in dente type 3 means

A

Invaginatus lined with enamel extends through root to form additional apical or lateral foremen

34
Q

Dens evaginatus unusual form is

A

Talon cusp anterior teeth

35
Q

Enamel pearl is

A

Drop of enamel or crown surface or root surface commonly seen in molars PDL cannot attach to enamel pearl periodontal pocket formed

36
Q

Dilaceration means

A

Deformity in which crown or root of tooth is displaced from its normal adjustment with the rooot or crown so tooth is severely bend along its long axis

37
Q

Dilacceration is caused by

A

Acute mechanical trauma especially intrusion injuries to primary dentition most frequently with maxillary incisors may cause difficulty in eruption\ not erupt at all

38
Q

Taurodontism is

A

A tooth in which pulp chamber has a greater apricot occlusal height than in normal teeth no constriction at level of cej pulp chamber extends apically beyond the neck of tooth and bifurcation become close to apex

39
Q

Taurodontism anomaly affects

A

Multirooted teeth and is caused by failure of hertwigs sheath to invanginate at proper level

40
Q

Taurodontism is not seen in

A

Primary dentition

41
Q

Taurodontism associated defects

A

Trisomy 21 and ED

42
Q

Double teeth commonly seen in

A

Primary dentition

43
Q

Double teeth is

A

Developmental anomaly where 2 teeth are joined together
Teeth appear joined at crown root or both

44
Q

Which teeth are most commonly affected in double teeth

A

Incisors and canines most frequently affected
Mandibular anterior ommonly affected in primary teeth

45
Q

Fusion is

A

Union btw denting and or enamel of 2 or more eparate developing teeth
2 buds joining together no of teeth less

46
Q

Germination is

A

Partial development of 2 teeth from single tooth bud following incomplete division. One of tooth bus breaks int tooth no of teeth more

47
Q

Concrescence is

A

Acquired disorder which root of one or more teeth are united by cementum alone after formation

48
Q

Concrescence is seen commonly in

A

Permanent dentition roots of maxillary 2nd and 3rd molars following hypercementosis associated w chronic inflammation

49
Q

Hypercementosis is

A

Developmental anomalies associated with pagets disease
Increased cementum
May cause Concrescence or ankylosis
Related to PDL diseases

50
Q

Supernumerary roots are

A

Presence of accessory root compared to normal
Uncommon and may occur in both dentition

51
Q

Supernumerary roots commonly seen in

A

3rd molar mandbular cuspid and pm most commonly affected

52
Q

Significance of supernumerary root

A

RCT and extraction

53
Q

Hutchinson incisor or they are feature of

A

Screwdriver shaped incisor
Congenital syphilis
Upper and lower incisor may be affected

54
Q

Mulberry molars show

A

Numerous disorganized globula projection on occlusal surface
Treponema palladium can cross placenta
Congenital syphilis

Oral Pathology (2 decks)

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