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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
how is the fitting surface of a porcelain veneer tx in the lab to improve adhesion
hydrofluoric acid on porcelain surface to make rough and retentive
26
if using a composite resin cement what material would ensure a good bond to the porcelain cement
silane coupling agent
27
how does silane coupling agent work chemically
C=C bonds for the composite oxides react covalently with the porcelain
28
where else is silane coupling agent used in dentistry (except with composite resin cement bonding to porcelain cement)
composite restorations to etch the cavity prep to allow an affective bond
29
when would you use a dual curing composite resin material to cement a veneer
if the veneer is thick (light cure is acceptable for thin)
30
aims of retracting flap
to protect soft tissues increase field of view
31
factors influenceing design of flap
* 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
32
insturment to remove bone
straight handpience saline cooled with a round tungsten carbide bur
33
how to debride prior to suture
phsyiological - bone file or handpiece to remove sharp bony edges irrigation - sterile saline into socket under flap suction - aspirate under flap to remove debris
34
pt suspected to have bleeding disorder 3 Blood tests needed to investigate
aPTT (activated partial thromboblastic time) FBC prothrombin time
35
eg inherited coagulation disorder
haemophila A
36
e.g. disorder of platelet numbers
thrombocytopenia
37
what LA technique used for pt with bleeding disorder and extract 47
infiltraion with articaine 4% 1:100,000 adrenaline
38
clotting factors affected by warfarin (4)
2, 7, 9 and 10
39
max INR tolerated for extractions (warfarin pt)
4 SDCEP
40
what LA technique used for pt on warfarin for extraction 47
IDB if INR is less than 4
41
2 ways clinical waste is made safe before landfill
incineration segregation
42
2 sources of amalgam
amalgam containing teeth excess amalgam from clinical procedure
43
what licence regarding disposal of amalgam and how long to keep
consignment note kept for 3 years
44
2 safety features of amalgam container
mercury vapour suppressant lid spill/leak proof lid
45
before prescribing F mouth rinse what you check before prescribing? paeds
can the child demonstrate spitting and are they over the age of 7
46
daily strength of F mouth rinse
225ppm
47
how to decide between conventional Vs Post and core
is there enough structure (ferrule) to maintain a conventional crown or would a post and core function better
48
fuction of post
to retain the core
49
materials for core and post
post: cast metal (gold), fibre, ceramic Core: amalgam, composite e.g. fibre post and composite core
50
5 ways to determine post length
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
post too wide - probelms
can cause root fracture
52
post too narrow problems
poor retention of the core and post is more likely to fracture
53
4 general health effects of smoking
increased risk of lung cancer COPD hypertension staining of skin around fingers
54
6 oral health effects of smoking
dry mouth oral cancer halitosis pale keratinised gingivae staining of teeth periodontitis
55
3 recent health promotion approaches in Scotland to reduce smoking
hidden storage of cigarettes in shops harmful effects advertised on cigarette packaging cigarettes sales changed from age 16 to 18
56
2 expamples of smoking cessation approaches in dental practice
3As - Ask, Advise, Act 5As - Ask, Advise, Assess, Assist, Arrange
57
incisor crown prep labial margin design and redcution
1.3mm shoulder
58
incisor crown prep labial benefits of margin design (1.3mm shoulder)
lets you incorporate both porcelain (0.9mm) and metal (0.4mm)
59
incisor crown prep palatal margin design and reduction
0.5mm chamfer
60
incisor crown prep palatal margin design benefits (0.5mm chamfer)
only metal required for this region as not seen and not in aesthetic zone so minimal prep is sufficient
61
4 properties of impression material for suitable crown prep
* low viscosity * low viscoelasticty * high tear resistance * low thermal expansion
62
xerostomia
dry mouth
63
xerostomia exacerbates which 4 oral health problems
caries candida periodontitis sialadenitis
64
4 drugs that can cause xerostomia
* benzodiazepines - diazepam * anti-diuretics - vasopressin, desmopressin, oxytocin * anti-depressants - fluoxetine, citalopram * anticholinergics - atropine
65
2 non drug related causes of xerostomia
sjorgen's syndrome diabetes radiotherapy
66
ARAB definition ortho
active component retention anchorage base plate
67
active component
components which apply force
68
retention
resistance to displacement forces - gravity, tongue, speech, mastication and active forces
69
5 possible displacement forces for ortho appliance
gravity tongue speech mastication active components
70
posterior cross bite -what component corrects
mid palatal screw
71
methods of retention for posterior cross bite URA and wire gauge (some permanent, some primary)
adams clasps 0. 7mm HSSW (permanent) 0. 6mm HSSW (primary)
72
anchorage for posterior cross bite URA
reciprocal from baseplate
73
how do you modify the base plate for posterior cross bite URA?
appliance cut in half and add flat posterior bite plane
74
function of flat posterior bite plane
takes the teeth out of occlusion allows the teeth to move x-bites
75
what could be added to URA to stop thumb sucking?
rake or crib
76
full denture custom tray 3mm spaced what impression material and why?
alginate because it is mucostatic and will take a accurate record of the tissues without displacement
77
full denture custom tray 3mm spaced why not silicone for IM
because it is mucocompressive and is likely to tear also not effective if undercuts present
78
2 areas of primary support on maxillar arch for full denture
residual ridge hard palate
79
3 areas of primary support on mandible for full denture
residual ridge retromolar pad buccal shelf
80
what muscle lies on floor of mouth
mylohyoid muscle
81
what part of mandible might interfere with maxillary impression within tuberosity regions during lateral excursions while taking a functional impression
coronoid process
82
submandibular duct length
5-6cm
83
submandibular duct arises
submandibular gland
84
submandibular duct opens
sublingual caruncle
85
submandibular duct what crosses on inferior side
lingual and hypoglossal nerves
86
chlorohexidine group it belongs to
bisbiguanide
87
chlorohexidine mode of actions
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
chlorohexide action in low concentration
in a low concentration it increases the permeability of the membrane
89
chlorohexidine action in high concentration
causes precipitation of the cytoplasma and cell death
90
chlorohexidine substantivity
persistence of action
91
chlorohexidine 3 factrs affecting substantivity
adsorption to oral surfaces maintenance of antimicrobial activity slow neutralisation of antimicrobial activity
92
volume, concentration and frequency of chlorohexidine (CHX)
0. 2 x 10ml = 20mg 2x a day 0. 12 x 15ml = 18mg 2x a day
93
4 indications for chlorohexidine
* post oral or periodontal surgery * physically or mentally impaired * immunocompromised pt * short term use for specific problem adjunt to oral hygiene
94
nursing home infected with food poisoning 3 factors increasing this risk
* 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
6 key links in chain of infection
infectious agent reservoir mode of exit mode of transmission mode of entry susceptible host
96
3 examples of advice to give carers when performing OH on elderly to stop cross infection
label toothbrushes perform hand hygiene between pts wear appropriate PPE (gloves, apron) and change between pts
97
ED# during rugby what tx
* 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
4 non radiographic signs and symptoms to monitor over time of ED#
colour tenderness to percussion percussion notes sensibility testing
99
4 radiographic signs tooth is non-vital
external inflammatory resorption periapical pathology ankylosis internal resorption

BDS3 Past Papers & Quizzes (14 decks)

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