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BDS3 Past Papers & Quizzes > MSA 2014 > Flashcards

MSA 2014 Flashcards

1
Q

A

A

maxillary nerve

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2
Q

B

A

pterygopalatine fossa

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3
Q

C

A

posterior superior alveolar nerve

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4
Q

D

A

pterygoid hamulus

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5
Q

E

A

nasal bone

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6
Q

F

A

infraorbital nerve

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7
Q

G

A

anterior superior alveolar nerve

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8
Q

H

A

anterior nasal spine

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9
Q

through which foramen does the maxillary nerve exit the cranial cavity

A

foramen rotundum

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10
Q

which parasympathetic ganglion has its sensory root derived from the maxillary nerve

A

pterygopalatine ganglion

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11
Q

which radiograph for partially erupted 48 when there is no evidence of 38 in the mouth

A

right side OPT

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12
Q

5 periodontal pathways of communication between the pulp space and the PDL

A
  • apical foramen
  • accessory canals
  • fractures
  • dentine tubules
  • perforations
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13
Q

deep suppurating pocket related to upper molar

no pocket elsewhere in the mouth and tooth non-vital

most likely Dx and Tx

A

endodontic lesion with periodontal involvement

RCT and sub-gingival scaling

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14
Q

4yo new pt C/O severe pain and sleep loss

E/O bruising on the right cheek and small abrasion right temple

concerned because

A

potential victim of child abuse and neglect

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15
Q

4yo new pt C/O severe pain and sleep loss

E/O bruising on the right cheek and small abrasion right temple

lead to child abuse and neglect because (2)

A

delay in seeking help

multiple injuries in abnormal places (temple)

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16
Q

4yo new pt C/O severe pain and sleep loss

E/O bruising on the right cheek and small abrasion right temple

Qs to ask to further investigate child abuse/neglect concerns

A

how and when did this happen?

why did you not come sooner?

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17
Q

3 outcomes after phoning for advice on potential child abuse case

A
  • nothing
  • investigated by social services and family support
  • child taken into care
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18
Q

4yo new pt C/O severe pain and sleep loss

E/O bruising on the right cheek and small abrasion right temple

treat painful tooth, but several other carious teeth requiring attention - but parent fails to bring the child back for next appointment - what should you do?

A

duty to share concern - speak to health visitor

local child safe guarding team should be contacted

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19
Q

what type of study would provide the highest level of evidence for the effectiveness of tx

A

meta analysis of systematic reviews and RCTs

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20
Q

4 main features of RCT

A

comparison control

inclusion and exclusion criteria

blinding

randomisation

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21
Q

how will the actual extent of caries present clinically compared to radiograph

A

clincial presentation is normally worse - deeper and more extensive

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22
Q

4 stages of sequence of operative procedures to render tooth caries free (after LA and dam placement)

A
  1. access caries through enamel and dentine at marginal ridge
  2. determine spread of caries at ADJ
  3. remove peripheraly caries working inwards
  4. smooth margins and remove unsupported enamel
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23
Q

3 adv composite over amalgam

A

bonds to tooth directly

aesthetically more pleasing

minimal cavity prep (no need for undercuts)

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24
Q

special needs child presents with carious 6s - unable to coperate for bitewings, considering extraction of 6s and possible GA

what special invesitgatin would be appropraite

A

OPT

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25
Q

how is the fitting surface of a porcelain veneer tx in the lab to improve adhesion

A

hydrofluoric acid on porcelain surface to make rough and retentive

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26
Q

if using a composite resin cement what material would ensure a good bond to the porcelain cement

A

silane coupling agent

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27
Q

how does silane coupling agent work chemically

A

C=C bonds for the composite

oxides react covalently with the porcelain

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28
Q

where else is silane coupling agent used in dentistry (except with composite resin cement bonding to porcelain cement)

A

composite restorations to etch the cavity prep to allow an affective bond

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29
Q

when would you use a dual curing composite resin material to cement a veneer

A

if the veneer is thick

(light cure is acceptable for thin)

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30
Q

aims of retracting flap

A

to protect soft tissues

increase field of view

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31
Q

factors influenceing design of flap

A
  • presence of local vessels and nerves
  • how aesthetic it will look when flap replaced and whether good healing will be achieved
  • access/visualisation and the ability to suture it back up
  • type of procedure being carried out
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32
Q

insturment to remove bone

A

straight handpience

saline cooled with a round tungsten carbide bur

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33
Q

how to debride prior to suture

A

phsyiological - bone file or handpiece to remove sharp bony edges

irrigation - sterile saline into socket under flap

suction - aspirate under flap to remove debris

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34
Q

pt suspected to have bleeding disorder

3 Blood tests needed to investigate

A

aPTT (activated partial thromboblastic time)

FBC
prothrombin time

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35
Q

eg inherited coagulation disorder

A

haemophila A

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36
Q

e.g. disorder of platelet numbers

A

thrombocytopenia

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37
Q

what LA technique used for pt with bleeding disorder and extract 47

A

infiltraion with articaine 4% 1:100,000 adrenaline

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38
Q

clotting factors affected by warfarin (4)

A

2, 7, 9 and 10

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39
Q

max INR tolerated for extractions (warfarin pt)

A

4

SDCEP

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40
Q

what LA technique used for pt on warfarin for extraction 47

A

IDB if INR is less than 4

41
Q

2 ways clinical waste is made safe before landfill

A

incineration

segregation

42
Q

2 sources of amalgam

A

amalgam containing teeth

excess amalgam from clinical procedure

43
Q

what licence regarding disposal of amalgam and how long to keep

A

consignment note

kept for 3 years

44
Q

2 safety features of amalgam container

A

mercury vapour suppressant lid

spill/leak proof lid

45
Q

before prescribing F mouth rinse what you check before prescribing?

paeds

A

can the child demonstrate spitting and are they over the age of 7

46
Q

daily strength of F mouth rinse

A

225ppm

47
Q

how to decide between conventional Vs Post and core

A

is there enough structure (ferrule) to maintain a conventional crown or would a post and core function better

48
Q

fuction of post

A

to retain the core

49
Q

materials for core and post

A

post: cast metal (gold), fibre, ceramic

Core: amalgam, composite

e.g.

fibre post and composite core

50
Q

5 ways to determine post length

A

minimum 1:1 length of crown

below the alveolar crest

2/3 the length of the root

4-5mm GP left apically

at least half the post in the root

51
Q

post too wide - probelms

A

can cause root fracture

52
Q

post too narrow problems

A

poor retention of the core and post is more likely to fracture

53
Q

4 general health effects of smoking

A

increased risk of lung cancer

COPD

hypertension

staining of skin around fingers

54
Q

6 oral health effects of smoking

A

dry mouth

oral cancer

halitosis

pale keratinised gingivae

staining of teeth

periodontitis

55
Q

3 recent health promotion approaches in Scotland to reduce smoking

A

hidden storage of cigarettes in shops

harmful effects advertised on cigarette packaging

cigarettes sales changed from age 16 to 18

56
Q

2 expamples of smoking cessation approaches in dental practice

A

3As - Ask, Advise, Act

5As - Ask, Advise, Assess, Assist, Arrange

57
Q

incisor crown prep

labial margin design and redcution

A

1.3mm shoulder

58
Q

incisor crown prep

labial benefits of margin design (1.3mm shoulder)

A

lets you incorporate both porcelain (0.9mm) and metal (0.4mm)

59
Q

incisor crown prep

palatal margin design and reduction

A

0.5mm chamfer

60
Q

incisor crown prep

palatal margin design benefits (0.5mm chamfer)

A

only metal required for this region as not seen and not in aesthetic zone so minimal prep is sufficient

61
Q

4 properties of impression material for suitable crown prep

A
  • low viscosity
  • low viscoelasticty
  • high tear resistance
  • low thermal expansion
62
Q

xerostomia

A

dry mouth

63
Q

xerostomia exacerbates which 4 oral health problems

A

caries

candida

periodontitis

sialadenitis

64
Q

4 drugs that can cause xerostomia

A
  • benzodiazepines - diazepam
  • anti-diuretics - vasopressin, desmopressin, oxytocin
  • anti-depressants - fluoxetine, citalopram
  • anticholinergics - atropine
65
Q

2 non drug related causes of xerostomia

A

sjorgen’s syndrome

diabetes

radiotherapy

66
Q

ARAB definition ortho

A

active component

retention

anchorage

base plate

67
Q

active component

A

components which apply force

68
Q

retention

A

resistance to displacement forces - gravity, tongue, speech, mastication and active forces

69
Q

5 possible displacement forces for ortho appliance

A

gravity

tongue

speech

mastication

active components

70
Q

posterior cross bite -what component corrects

A

mid palatal screw

71
Q

methods of retention for posterior cross bite URA and wire gauge (some permanent, some primary)

A

adams clasps

  1. 7mm HSSW (permanent)
  2. 6mm HSSW (primary)
72
Q

anchorage for posterior cross bite URA

A

reciprocal from baseplate

73
Q

how do you modify the base plate for posterior cross bite URA?

A

appliance cut in half and add flat posterior bite plane

74
Q

function of flat posterior bite plane

A

takes the teeth out of occlusion allows the teeth to move

x-bites

75
Q

what could be added to URA to stop thumb sucking?

A

rake or crib

76
Q

full denture

custom tray 3mm spaced

what impression material and why?

A

alginate because it is mucostatic and will take a accurate record of the tissues without displacement

77
Q

full denture

custom tray 3mm spaced

why not silicone for IM

A

because it is mucocompressive and is likely to tear

also not effective if undercuts present

78
Q

2 areas of primary support on maxillar arch for full denture

A

residual ridge

hard palate

79
Q

3 areas of primary support on mandible for full denture

A

residual ridge

retromolar pad

buccal shelf

80
Q

what muscle lies on floor of mouth

A

mylohyoid muscle

81
Q

what part of mandible might interfere with maxillary impression within tuberosity regions during lateral excursions while taking a functional impression

A

coronoid process

82
Q

submandibular duct

length

A

5-6cm

83
Q

submandibular duct

arises

A

submandibular gland

84
Q

submandibular duct

opens

A

sublingual caruncle

85
Q

submandibular duct

what crosses on inferior side

A

lingual and hypoglossal nerves

86
Q

chlorohexidine

group it belongs to

A

bisbiguanide

87
Q

chlorohexidine

mode of actions

A

dicationic - 1 cation attaches to the dental pellicle and the other attaches to the bacterial membrane

in a low concentration it increases the permeability of the membrane

in high concentration it causes precipitation of the cytoplasm and cell dealth

88
Q

chlorohexide

action in low concentration

A

in a low concentration it increases the permeability of the membrane

89
Q

chlorohexidine action in high concentration

A

causes precipitation of the cytoplasma and cell death

90
Q

chlorohexidine

substantivity

A

persistence of action

91
Q

chlorohexidine

3 factrs affecting substantivity

A

adsorption to oral surfaces

maintenance of antimicrobial activity

slow neutralisation of antimicrobial activity

92
Q

volume, concentration and frequency of chlorohexidine (CHX)

A
  1. 2 x 10ml = 20mg 2x a day
  2. 12 x 15ml = 18mg 2x a day
93
Q

4 indications for chlorohexidine

A
  • post oral or periodontal surgery
  • physically or mentally impaired
  • immunocompromised pt
  • short term use for specific problem

adjunt to oral hygiene

94
Q

nursing home infected with food poisoning

3 factors increasing this risk

A
  • no hand hygiene or use of gloves prior to food preparation
  • meat storage mixed with other food stuffs when it should be kept separate on the bottom shelf
  • food and medication stored in same place
95
Q

6 key links in chain of infection

A

infectious agent

reservoir

mode of exit

mode of transmission

mode of entry

susceptible host

96
Q

3 examples of advice to give carers when performing OH on elderly to stop cross infection

A

label toothbrushes

perform hand hygiene between pts

wear appropriate PPE (gloves, apron) and change between pts

97
Q

ED# during rugby

what tx

A
  • account for fragment
  • either bond fragment to tooth or place composite bandage
  • 2 periapical radiographs to rule out root fracture or luxation
  • radiograph any lacerations to rule out embedded fragment
  • sensibility testing and evaluate tooth maturity
  • definitive restoration
  • follow up 6-8 weeks and 1 year
98
Q

4 non radiographic signs and symptoms to monitor over time of ED#

A

colour

tenderness to percussion

percussion notes

sensibility testing

99
Q

4 radiographic signs tooth is non-vital

A

external inflammatory resorption

periapical pathology

ankylosis

internal resorption

BDS3 Past Papers & Quizzes (14 decks)

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