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FINALS!!! > Resotrative - revision notes > Flashcards

Resotrative - revision notes Flashcards

1
Q

Indications for veneers

A

discolouration
peg laterals
diastemas
enamel defects
crowding
poor aethetics

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2
Q

contraindications for veneers

A

high smile line
poor oh
gingi recession
nail biting
posterior crossbite
heavy occusal contacts
severe discolouration

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3
Q

Dimensions

A

buccally - cervical = 0.3mm, mid = 0.5mm, incisally = 0.7mm
ging - 0.5mm into saulcus

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4
Q

Incisal reduction types

A

feather - no incisal edge and prone to fracture
window - mos protective, poor aethetics and margins
incisal bevel
incisal overlap - chamfer on paltal surface, 2mm reduction, good strength and cementation, lots of tooth tissue removed

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5
Q

Cavity prep steps

A

identify and remove carious enamel
remove enamel to identify the extent of the carious enamel at the acj and smooth margins
remove carious from the perherial surface and slowly work circumfertianlly
remove caries over the pulp
outline form modification
internal design modification

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6
Q

A lining whyq

A

prevent secondary caries
pulpal protection
prevent enamel contamination
risk of microleakeage
effect on bonding

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7
Q

Wooden wedges purposes

A

to rovide temp seperation between teeth
to hold the matrix band in place
to prevent amg going ginginval
t oprovide a good wall for contouring

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8
Q

Advatnages of composite

A

good aesthetics
radiopaque
biocomopatible
low thermal conduction
good abrasion resistance
conservative of tooth strtucre
easily manipulated
no retentive features

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9
Q

Disadvantages of composite

A

technique sensitive
requires good mositure control
contraction on setting
expensive
easily stained

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10
Q

Componenets of composite

A

Filler particles
Bis gma
silane coupling agent
low weight dimethacylates
camphorquinone

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11
Q

Increasing the filler particle

A

increases the visocity - helps with polymerisation contraction stress and mechanical propterties - wear, resistance, fracture, rigity,, strength

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12
Q

Polymerisation stress can cause

A

flexure or crack of the tooth
a gap which can cause microleakage, sens, caries, fracture

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13
Q

Reduce polymerisation contraction

A

small increments placed
higher filler particle
configuration of cavity prep

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14
Q

Polymerisation shrinkage

A

the base of the cavity has a lower bond compared to the composite
the composite lifts away from the base and fluid enters the deintal tubules
the fluid bounces around in the deintinal tubles and can cause pain

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15
Q

Advatnages of amagam

A

radiopaque
easy to place and quick
econmical
resistance to corrosion
good for wear resistnace and toughness
less mositure control required and not tech sens
long lasting and durable

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16
Q

disadvatnages of amalgam

A

merctuy toxicity
colour -asthetics
lichenoid reaction
amalgam tatoo
takes 24hrs to set so potential for fracture straight after placement
requires undercuts so destruction of healthy tooth tissue

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17
Q

amaglgam consits of

A

an alloy with mercury, silver, tin, copper

high copper alloys used as they eliminate the weak gamma 2 phase recuding corrsion

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18
Q

Tools for implant placement

A

diagnostic wax up
study models
clinical photos
essex temp retainer
surgical guide and template
radiographs

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19
Q

Who can’t have implants placed

A

immunocompromised
bisphosphonates
diabetes
bleeding risk
smokers
hx of perio disease
significant loss of alveolar bone
congential cardiac defect

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20
Q

Ging biotype for implants

A

thick and low scalloped

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21
Q

Shape of crown best from implant placement

A

rectangular

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22
Q

Smile line types

A

high >2mm of soft itssue showing
med = <2mm of soft tissue showing
low - convers 25% of tooth surface

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23
Q

Implant types

A

removable - stud, magnet, bar
fixed - cement or screwed

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24
Q

Peri-mucisitiis

A

inflammation of the mucosa surround the implant
BOP
no alveloar or crestal bone loss present

Tx - non surgical mechanical debriement and chx provided

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25
Peri -implantitis
inflammation of the mucosa surround the implant and loss of peri implant bone tx - removal of abutment and non surgical debridement and OHI
26
Why does peri-implantitis occur
mechanical forces/overload poor oh and inadequte cleaning smoking underlying health issue poor design of implabt
27
Complications of implant placement
biomechanial - peri-mucisitis, peri-implantitis Mechanical - abutment screw loose, fracture of tooth, soft tissue recession, trauma - bony fractures
28
GDP monitor the implant site
perio probing bleeding mobility suppuration OH Recession
29
attirtions
the loss of tooth tissue substance due to physical cotnact either ebtween teeth or between teeth and restorations Tx - soft or hard splints can be related to bruxism
30
Abrasion
the loss of tooth subasance through an abnormal mechanicial process not involving the occulsion toothbrushing, toothpaste, pipe smokers Tx - change habits, change toothburhs or toothpaste V shaeped notches on the teeth around the cervical margin area
31
Erosion
the loss of tooth substande due to a chemial process rather than a bacertial action Intrisic - GORD or bullima Extrisinci, carbonated drinks, gels, citric fruits, acids
32
Abfraction
loss of tooth substance that is a biomechanical force distant from the point of loading brusism sharp rim at the acj
33
Carbonated drinks casues
palatal erosion of uper incisors incisir wear loss on centroals posterio manidble cupping and facets sensitivity buccal white spots
34
Basic erosisve wear
split into sexants 0 = no toothwear 1= incisal loss of surface texture 2 = <50% hard tissue surface loss, defects appearing 3 = >50% hard tissue surface loss <2=none 3-8=low 9-13=med >14 = high
35
Info for pt following toothwear build up
soft diet for 1st weeks speech may feel odd occlusion and bite will feel strange crowns or bridges may need replaced may impinge on speech front teeth only touch and could take 3-6months for posterioer ones to touch
36
Planning for toothwear
take a full medical, dental social history understand the nature of the tooothwear adn casues cause addressed liase with pts about aesthetics and approach to tx clinical photos poteintal radiographs diagnositc wax up interoccusla record casts mounted on a semi adjustable articulator stents temp entures
37
tx for lower ants wear
complete before the upper but hard
38
upper ants wear 5 factors
the type of wear the space require the interoccusal space the pts wishes and aethetically demand quantitiy and quality of enamel
39
contrsaindcations to the dahl tech
bisphosphonates active perio implants placed tmj issues exsiting convential bridges post ortho
40
Dahl tech
generalised toothwear mainly ats with decreased in OVD 1. place an anterior bite plane 2. this allows the posterior teeth to overeupt into position 3. the bite plane is removed 4. takes 3-6months for the spcae to pen anteriorily
41
BEWE scores tx
<2 = routine maintance and oberservation at 3year intervals 3-8 = routine maintance and dietary advice, recall at 2 year intervals 9-13 = OHI and diet, routine maintance, fluoride delivery, avoid resotrations, 6-12month recall >13 = OHI and diet, routine maintance, flurodie mesaures consider resotrations 6-12months interval recall
42
Suprahyoid muscles
diagastric and geniod - deppress the mandible and elevates the hyoid bone stylohyoid - pulls hyoid bone posterior and superior for swallowing mylohyoid - elevates the hyoid bone and floor of mouth
43
Temporalis
elevates and retracts mandible inserts - the cornoid process orgiin - the temoral fossa
44
Masseter
elevates and retracts the mandible origin - superifcal - the maxiallary process of zygomatic arch, deep - zygomatic arch of temporal bone inserts - the raumus of the mandible
45
Medial pteryogind
elevates and retracts mandible inserts - ramus of mandible origin - superifical - maxiallry tuberosity, deep - medial aspect of the lateral pertygoing plate of the sphenoid bone
46
Lateral pterygoid
depresses adn prtracts the mandible inserts - neck of mandible origin - inferior - lateral pterygoid plate of spehnoid bone, superior - greater wing of sphenoid
47
5 properties of occulsal forces
frequency duration direction magnitiude velocity
48
Posselts enevelope
broder movement in the sagittal plane ICP - centric occulsion, comfortable bite for pt, teeth in contact T - max opening E -edge to edge - when teeth slide forward from ICP gliding on palatal surface of ants Pr - protrusion - condylar moves forwards and downwards on the articular emeneice R - retruded axis position - no tooth contact, reporoducible jaw position, the condylar is most superior anterior in the glenoid fossa RCP - the first tooth cotact made when the person moes into the retrued position, about 1mm postieror to the ICP
49
Border position
one determined by the anatomy of the TMJ and the surround musculature involvment
50
Bennets angle
produced by the saggital place of the mandibluar condyle in lateral movements viewed in the porizontal plane shows the noon working condyle
51
Fremitius
excessive vibration force that is produce by premature ocntact of teeth
52
When not to use the patient in ICP/conformative approach
when the pt wishes thier aethetics altered when you want to increase the vertical facial height occlusin of teeth severly out position hx of occlusal fracture or fractures of resotrations
53
Facebow
records the relationship of the maxialla relative to the hinge axis of the mandible the mandible is moutned in ICP or RCP
54
Christensons Phenomenon
a gap that appears between the posteiror ends of flat occlusal rims when the madnible is protruded leads to instability
55
Inlay
indirect intracornal resotration boned into place
56
Onlay
an extracornal resotration which inlcudes proximal surface
57
Inidactions for inlay/onlay
heavily restored teeth repeated fractrues of direct resotrations to resotre a root trested tooth to protect remaining tooth tissue in patients whos occulsions are diffuclt to ontain
58
advatnages of inlays/onlays
good aethetics strong durable cuspal protection less polymerisation shrinkage, micro leakage, cusp fracture
59
disadvatanges of onlay/inlay
expensive and require lab fees marginal ditching ceramic can wear the opposing occlusion debonding due to poor etch or occlusion ceramic fracture due to lack of bluck
60
Materials used for inlays/onlays
Gold ceramic cermoer composite
61
ideal taper for inlay/onlay
5-7degrees
62
indications for bridgework
speech and function aesthetics stability for occlusion favourable occlusion no caries/active perio abutment teeth have no complaications
63
Contraindications for bridgeowrk
poor oh active caries or perio heavily rotate or tilited teeth as can't achieve path of instertion large pulps poort occlusion/bruxists un-coperative overeuption of opposing teeth
64
Retetnion increased by
sandblasting the fitting surface of wing having a large surafce area for bonding placing rest seats on surface area of bonding grooves ad notches
65
Material types
gold ceramic zirconica metal ceramic
66
Ridge desings
wash throught - hygienei santitiary - no soft tisue contact - lower molars dome shaped - torpedo/bullet - for lower incisors, premolars and upper molars modified ridge lap - buccal surface normal, lingual surface cut away - for low smile line (good cleansibiity) ridle lap saddle - contacts soft tissue - high smile line, ants, long span ants - unfavourable as hard to clean
67
Resin bonded retainer wing
non precious metal as ridig and can bond easily too thin section - should be 0.7mm to reduce flexure however can shine through so can use zirconia
68
Cementation
metal ceramic - GI or RMGI ceramic - dual cure resin adhesvice - anaerobic dual cure resin with 10MDP
69
fixed fixed bridge
advantages - used in long spans of mssing teeth, robust, good retention and strenght disadvatanges - requires removal of tooth tissues, difficult to achieve common path of insertion, prep difficult
70
Hybridge bridge
one side crown and other side adhsice resin cemented wing
71
Cantilever bridge
only a prep crown on one side advantages - minimmal tooth prep and conservative, straightforward disadvatanges - has to be rigid to prevent disortion, short span only
72
Adhesvice bridge
only single or short span advatanges - lo la, no prep, conservative of tooth tissue, min surgery time, less cost disadvaangtaes - can easily debond, metal shine through, no trail period, occulsal interfecnce not used in long span - heavy occulsal forces, insuffient enamel
73
sprnig cantilever bridge
is when the pontic as a metal arm which runs across paaltal mucosa to a reatiner on the palatal side of another tooth advantages - where adjacent teeth are not prepper, used in space incosrs, posterior teeth as good abutments disadvantes - traumtises palatal mucosa, can be hard to clean underneath, only for upper incors, difficult to control pontic movement due to springness
74
abutment evaluation
crown:root 2:3 must be able to withstand foce no active caries or perio supporting tissue healthy and free from disease

FINALS!!! (20 decks)

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