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BDS3 OSCE > 2013 > Flashcards

2013 Flashcards

1
Q

rotations/second range

A

4000-6000

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2
Q

checklist for handpiece safety

A

sterile and fit for use

  1. Backcap secure
    • ensure cap does not rotate, never finger tighten
  2. insert bur
    • try pull it out, make sure bur locates in chuck
  3. bur spins freely
    • spin it on finger and see if it spins on own axis
  4. bur doesn’t wobble
    • on finger and when switched on
  5. sounds OK
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3
Q

mirrors

A

viewing intra orally, soft tissue retraction and protection

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4
Q

Probes

A

No6 is straight

caries detection, point focus, surface testing, retraction

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5
Q

CPITN probe

A

BPE

black bands 3.5-5.5mm

ball ended 0.5mm

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6
Q

PCP-12 Prpbe

A

periodontal pocket chart

black bands 3-6mm and 9-12mm

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7
Q

Tweezers

A

for handling small objects

either sugrical locking tweezers or college tweezers

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8
Q

excavators (spoon or round)

A

caries excavation, material removal and manipulation, shaping and contouring of restorations

3 sizes

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9
Q

plastics and flat plastics

A

manipulation of shapeable filling material (composite, GI)

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10
Q

condensor

A

condensing amalgam, manipulate composite

standard plugger and lustra amalgam

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11
Q

carvers

A

carving amalgam, shaping composite

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12
Q

chisels

A

finishing cavo-surface margin angles, removal of unsupported enamel prisms

Blacks

Gingival Margin Trimmers

Blacks 84 (straight)

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13
Q

burnishers

A

finishing amalgam restorations/manipulating composite

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14
Q

applicators

A

placement of lining material - thymozin instruments

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15
Q

spheno-occipital synchondrosis

A

open or closed?

closes by 16-25 years

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16
Q

occipital bone - centres of ossification fused or separate?

A

fused by school children

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17
Q

anterior fontanelle - fused or closed?

A

soft bit on babys head

98% closed by 2

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18
Q

metopic suture present or absent?

A

usually disappears by 6

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19
Q

mastoid process

disinct or indisinct?

A

distinct at about 2 years old

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20
Q

tympanic ring or plate?

A

starts as tympanic ring but lengthens to plate

external auditius meatus

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21
Q

mandible - mental symphsis fibrous or ossified?

A

unfused centre of mandible

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22
Q

mandible angle between body and ramus - obtuse or markedly obtuse?

A

starts of markedly and gets less so

until teeth lost

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23
Q

cavo-surface margins approx

A

90o

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24
Q

line angles

A

2 points

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25
Q

point angles

A

3 points

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26
Q

principles for using Gracet currette

A
  1. Determine LARGER, OUTER cutting edge before beginning
  2. After visual inspection, confirm the correct cutting edge by adapting it to the tooth with the TERMINAL SHANK PARALLEL to the surface to be scaled.
  3. Only the back (flat, shiny face) of the instrument can be seen from above if the correct edge has been selected
  4. Lower shank is parallel to tooth
  5. Use fulcrum & finger rest
  6. Vertical & diagonal cutting strokes may be made
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27
Q

syringe

A

Before beginning, check patients medical history & check injection site

  1. Tear back sterile seal of cartridge, check sell by date & insert gold end into syringe
  2. Grip & retract plunger handle to cover silicone washer. Roll plunger onto cartridge
  3. Slide protective sheath back towards handle until it CLICKS. Make sure there is no gap and plunger is locked to syringe handle
  4. Remove needle cap & discard it. Needle is ready for use
  5. Passive aspiration & Active aspiration
  6. To change cartridge, slide sheath up to 1st holding position, remove & change
  7. When used lock needle in 2nd holding position of-Do not try unlock when like this
  8. Fully retract & peel plunger - autoclave. Needle in sharps box & cartridge in glass box
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28
Q

all deciduous teeth by

A

2 and half years

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29
Q

all permanent teeth by

A

12 years

bar 8s

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30
Q

rough rate of tooth eruption

A

every 6 months of life roughly 4 teeth will erupt

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31
Q

sequence of deciduous eruption

A

A

B

D

C

E

(first molars before canine)

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32
Q

permanent teeth eruption

A

All lowers develop before uppers except 5s

Upper:

  • 1st molar then front to back EXCEPT 3s:
  • 6, 1, 2, 4, 5, 3, 7, 8

Lower:

  • 1st molar then front to back:
  • 6, 1, 2, 3, 4, 5, 6, 7, 8
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33
Q

root completion

A

3 years from eruption date to get complete apexogenesis

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34
Q

upper right 1st primary molar morphology

A

2 buccal roots;1 lingual.

  • Mesio-buccal root is wider cervically than disto-buccal root is

Tubercle of Zuckerkandl on mesio-buccal cusp

4 cusps.

  • Large mesio-buccal & diminutive disto-buccal.
  • Mirrored lingually
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35
Q

lower right first primary molar morphology

A
  • Prominent tubercle (Tubercle of Zuckerkandl on mesio buccal cusp)
  • 4 cusps.
    • Mesio cusps larger than distal.
    • Buccal cusps are seen to lean lingually
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36
Q

upper right second primary molar morphology

A

Replica of permanent first maxillary

2 buccal roots;1 lingual.

Transverse ridge

Cusp of Carabelli often seen on lingual surface of mesio-lingual cusp

37
Q

lower right 2nd primary molar morphology

A

3 cusps like permanent first

Similar to mandibular permanent first molar

5 cusps: Three buccal & two lingual

  • Buccal cusps have a lingual lean
38
Q

maxillary tuberosity

A

Bulge behind maxillary 2nd molars

39
Q

hamular notch

A

notch behind tuberosity at junction of maxillar and hamular process of sphenoid

40
Q

vibrating line

A

where hard and soft palate meet

41
Q

palatine fovea

A

sit just behind vibrating line - plays role in gag reflex

42
Q

palatine raphe

A

line runs down centre of hard palate

43
Q

palatine rugae

A

wrinkles at the side of the hard palate

44
Q

incisive papilla

A

elevation of tissue just behind two front teeth

45
Q

maxilla anatomical points

A
  • maxillary tuberoisty
  • hamular notch
  • vibrating line
  • palatine fovea
  • palatine raphe
  • palatine rugae
  • incisive papilla
46
Q

mandibular anatomical points

A
  • pear shaped pads
  • retromolar pads
  • buccal shelf
  • labial frenum and sulcus
  • buccal frenum and sulcus
  • lingual frenum and sulcus
  • mandibular tori
  • mylohyoid ridge
  • pterygomandibular raphe
  • dorsal surface of tongue
  • ventral surface of tongue
47
Q

pear shaped pads

A

scarring after removal of the most distal molar

keratinised tissue

48
Q

retromolar pads

A

elevation distal to mandibular 2nd molar

non-keratinised extension of pear shaped

49
Q

buccal shelf

A

area between buccal frenum and anteiror border of masseter

50
Q

mandibular tori

A

abnormal bony prominence

51
Q

mylohyoid ridge

A

lingual surface of mandible

52
Q

ptyergomandibular raphe

A

stretches from back of upper last molar to botton of lower molar

site of LA injection

53
Q

dorsal surface of tongue

A

top of tongue

54
Q

ventral surface of tongue

A

bottom of tongue

55
Q

what to do in primary avulsion

A

Wash under water 10s by holding crown & reimplant or store in a cup if patients saliva/saline

Flexible splint for 2 weeks for avulsion.

  • One abutment tooth either side.
  • Must be passive.
56
Q

flexible splint for avulsion

A
  1. cut & bend 0.6mm stainless steel wire. Measure length using a piece of floss, and bend using Adams pliers
  2. Acid etch 10s on middle of tooth, apply prime & bond
  3. Apply composite to traumatised tooth and those adjacent, avoiding contact areas
  4. Sink the contoured, passive wire into the composite
  5. Shape & cure composite. Add thin covering to top of wire
  6. Smooth rough composite and wire ends
57
Q

survey

A

determines guide planes and undercuts and marks survey lines for fabrication of RPD

58
Q

survey lines represent

A

largest concavity of tooth in relation to planned path of insertion

59
Q

Guide planes

A

2 or more parallel tooth surfaces which determine path of insertion adn withrawal of RPD

60
Q

path of insertion

A

path followed by denture from first contact with teeth/tissue until it fully seats

61
Q

path of displacement

A

any path by which the denture can be displaced

62
Q

common path of displacement

A

taken at 90o to the occlusal plane (horizontal)

63
Q

role of surverying

A

carried out to eliminate undercut areas that would prevent the denture from being inserted/removed

or for the undercuts that can be utilised by clasps

64
Q

tools for surverying

A

chuck holds it

analysing rod, graphite markers, 3 undercut gauges, wax knife

65
Q

how to survey

A
  1. Position cast onto surveyor table & orientate to common path of displacement
  2. Tripod cast as common path of displacement
  3. ‘Eyeball’ abutment teeth & associated soft tissue with analysing rod
  4. Mark upper & lower survey lines on abutment teeth & associated soft tissue with graphite marker
  5. Select undercut gauge and clearly identify undercuts which cannot be seen for mechanical retention
66
Q

tripoding in surveying

A

records the common path of displacement and insertion and withdrawal

67
Q

surveying table can be tilted to

A
  • Provide retention (using guide surfaces of teeth)
  • Improve appearance (close unsightly gaps)
  • Eliminate interference (undercuts present satisfactory path of insertion)
68
Q

survey line indicates extent of undercut

so

A

below line must be used or blocked out

69
Q

tilting table of surveyor affects

A

path of insertion

70
Q

why change path of insertion

A

aesthetics

retention

interference

(make it different from common path of displacement)

71
Q

RPD design components

A

support

retention

connector and minor connector

acrylic retention

72
Q

support in RPD

A

rests - occlusal, cingulum, incisal, ledge

73
Q

retention in RPD

A

occlusally or gingivally approaching (ring)

reciprocation or bracing (arm or plate)

74
Q

major connector in RPD

A

open or closed design

Maxilla

  • anterior, mid palatal, posterior or ring

Manidble

  • lingual bar (needs 8mm), lingual plate, Kennedy bar, sub-lingual plate
75
Q

minor connector in RPD

A

joins components to major connetor

76
Q

acrylic retention in RPD

A

mesh

bar

post

77
Q

finsihing lines in RPD

A

bounded or free end saddle

78
Q

instruction for lab presscriptions needs

A

What does the dental technician need to know?

What do you want the technician to do?

79
Q

1st visit RPD

A

Selection of stock trays & alginate primary impressions taken

Disinfect & sealed clear bag with gauze

Instructions 1st clinical

  • Please pour up primary impressions in dental stone
  • Please make special trays (1-2mm spacer) with working handle.

Do we need articulated study casts? (free end saddle? if yes - record blocks needed)

80
Q

before 2nd visit for RPD

what do you need to do

A

Survey to path of insertion to decide undercuts.

RPD Design

81
Q

2nd RPD visit

A

Secondary impressions with special trays

  • after any tooth prep needed for design

Send design - get signed off by clincian

Instructions 2nd clinical

  • Please pour up working impression (Master) and construct working duplicate
  • Construct wax occlusal rims.
    • Indicate whether these need to be wax or resin
82
Q

3rd RPD visit

A

Patients without occlusal contacts and stops to indicate correct ICP

Patients with occlusal contacts in the ICP

Instructions 3rd clinical

  • Please articulate casts to registration provided
  • Please set up teeth for wax trial or construct metal framework for metal wax trial
    • Tooth selection: Material, Mould, Shade
83
Q

instructions for final RPD visit after successful wax trial

A

Please flask pack and finish (CoCr) or please process in acrylic resin

84
Q

5 moments of social handwashing

A
  • Before touching a patient
  • Before a clean/aseptic procedure
  • After bodily fluid exposure risk
  • After touching the patient
  • After touching patient surroundings
85
Q

stages in complete dentures

A

Stage 1-primary impressions in alginate or impression compound.

  • Ask for: pour in 50:50plaster/stone, construct upper and lower custom trays in light cured PMMA, non-perforated, withupper 2mm spacing and lower 1mm spacing(close fitting), intra oral handles and finger stops

Stage 2-master impressions in silicone or polyether.

  • Ask for: please pour in 100% dental stone andconstruct wax rims for jaw registration. Return rims on casts.

Stage 3-jaw registration.

  • Ask for–please mount casts in registration and set teeth for wax trial.Return wax trial dentures on mounted casts.

Stage 4–trial.

  • Ask for retrial if required, or please finish in heat cured PMMA and return on casts.

Stage 5–Delivery

86
Q

stage 1 to 2 complete dentures

A

primary imps to master imps

pour in 50:50plaster/stone, construct upper and lower custom trays in light cured PMMA, non-perforated, withupper 2mm spacing and lower 1mm spacing(close fitting), intra oral handles and finger stops

87
Q

stage 2 to 3 complete dentures

A

master imps to jaw reg

please pour in 100% dental stone andconstruct wax rims for jaw registration. Return rims on casts.

88
Q

stage 3 to 4 complete dentures

A

jaw reg to trial

please mount casts in registration and set teeth for wax trial.Return wax trial dentures on mounted casts

89
Q

after stage 4 complete dentures

A

Ask for retrial if required,

or please finish in heat cured PMMA and return on cast

BDS3 OSCE (6 decks)

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