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FINALS!!! > Denture revision notes! > Flashcards

Denture revision notes! Flashcards

1
Q

Primary impression

A

prealse pour upper the upper and lower alginate impresions in 0:50 stone and provdie spical trays
upper - 3mm space non perforated llight cured acrylic resin trya with extra olral handles
lowers - close fitting light cured acrylic resin tray with extra oral handles

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2
Q

master impressions

A

please pur up the scondary impressions in 100% dental stone
please provide wax record blocks on light cured bases

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3
Q

Jaw reg

A

please mount the casts to the hreg providied
lease provide try in of wax teeth
mould and shade
detail in specal features

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4
Q

Tooth trial

A

please wax up for finish in heat cured acrylic

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5
Q

Denture hyg

A

please remove denture at night and soak in water
do not soak in boiling water as can distort denture
please clean over a bowel of water to prevent damage if dropped
clean denture after ever meal]may impinge on speech adn salivation
may get intial discomfort and pain
lceanwwith a soft bristle brush adn imild soap or denture cleaners not toothpaste
if yuing dental dhesvie then small amount and removed everyday
if denture becomes sore and can’t wear then wear 24hrs before appt to allow dentist to see sore aras
routine dental check ups 1year

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6
Q

Denturec leaners

A

alkialine peroixe - sterodent - hardens soft linings
alkaline hypochloritres - milton -only use for 10mins
ezymes - proliners - expensive and bleaches acrylic
abrasive cleaners - denturecreme abrasive - smokers

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7
Q

Attwood classification for boneresoprtion

A

class I - dentate - the area before xtraction of tooth from the socket
class II - post xla - tooth as just been removed from socket, bone deposition has started to form, edges sharpened
CLass III - broard avloear process - bone deposition continues and no reduction in height
Class IV - knife edge avleoar process - the alveolus shape starts to thicken into a knife edge appearance
Class V - flat ridge - resoprtption starts to occur creating a flat ridge
Class VI - submerge ridge - the alveolar bone starts to resprp into the basa lbone

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8
Q

Primary impressions

A

supplies a negative impression of the tissues in the mouth
becomes a positive impression when cast in dental stone
uncercuts - alginate
no undercutes - use non elastic impression compound
chec for - perheral seal, voids, tears, air bubbbles, surface detaail, extension to post dam, flange depth adn sulucs captures, denture bearing areas

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9
Q

MAster impressions

A

provedes a more accurate impression of the mouth
allows good functional depth adn width of sulcus to be captures with border modelling and muscle trimming to provide good perpiheral seal
occlusal stops - upper = canine and post dam, lower = retromolar pads and ridge of canine area

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10
Q

Jaw reg

A

LIMBO
lips
incisal lvel
mid line
buccal corridor
occlusal plane
shade
moulde
special features
jaw red

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11
Q

Tooth trial

A

check for extention retention, stability, aesthetics ,spreech, freeway space, denture bearing areas, present of post dam for retetnion, occlsuion, perpiher extentions

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12
Q

Delivery

A

repeart same steps carried out at tooth trial
provide denture hyg insutrctions and review in 1week

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13
Q

Why dentures fravture

A

trauma and impaction
thina crylic surface
work hardening on metal
bruxists pts
deep overbite
use of soft linings

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14
Q

advatanges of acrylic

A

cheap
good aethetics
easy to use for technicina
can allow relines and rebases
ca`nall allowaddiotoin of teeth

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15
Q

disadvatagnes of acrylic

A

allergy ot monomer
fracture resitance is decreased
denture whitening
can absorp wter easily
risk of caindial infecitons
impact strength reduced

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16
Q

disadvatnages of immediate dentures

A

gross irregularties ofteeth make processing dififcult
requires good co-operation from pt as need review appts
alveolar bone resoprtion overtime
incrseased cost as need relines and rebases

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17
Q

Review appts after imeedaite denture placement

A

24hrs - to check socket area and healing
1 week - to check the denture and healing status
1month - the socket will have healed check denture retention
3-6months potential for reline/rebase of denture
12 months - provide new denture for pt using the copy technique

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18
Q

Reline

A

the addtion of a lining materia on the fitting surface of thre denture to fil the space between the denture and the new contoured tissue

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19
Q

Rebase

A

the complete removal of the denture base and replaced with a new one

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20
Q

uses for reline and rebases

A

only if the only issue is do with retetnion
pt happy to live without denture for period of time

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21
Q

reline advantages

A

can be carried out at chairside
improves retetnion
can be permanent or temporary

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22
Q

Rebases advatanges

A

does not alter the paaltal thickeness
allows the colour of denture bases to change if been bleached

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23
Q

types of relines

A

temp - implant surgery, tissue conditioner
soft - used for cancer pts, bruxists, atrophic ridges
permanenent - acrylic - for immediate dentures, bad master imps, perpiheral seal

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24
Q

replica dentures

A

replicated polished surface of the denture and can have some small changes e.g - occlulsion and adaptation

25
Q

why do copy dentures

A

if pt wants a second set - care home
detoritation of the denture base
immediate dentures requires
retention is the only issue with the denture
good occlusion and polished surface
wear of occulsa surface

26
Q

contra indications for copy dentures

A

if there are more issues than just renttion - ovd, neutral zone, facial height
pt has lost denture
issue with polished surface of dentures

27
Q

Loose denture

A

polished surface - over or under extended
occulsal surface - high occulsal plane, new jaw reg required
impression surface - lack of adhesvice, mandibular atrophic rdige, flabby rdie, bony deposits, warping denture base

28
Q

neatural zone

A

the teeth on the denture base are plasced in an area to ensure maximum avoidance of muscles extra and intra orally

29
Q

complaints of dentures

A

ulcers
dry mouth
angular chelitis
denture stomatitis
denture induced hyperlpasia
speech and speaking diificults
pain on cheek and tongue
pain on one side
teeth meet too soon
localised pain to premolar region
lack of chewing, collapse in face
poor mastication

30
Q

flappy ridge

A

where bone resoprtion and loss has occrued and replaced with fbirous tissue
support weak and leads to insibility

31
Q

netural zone

A

the teeth ares et on the denture base to ensure maximum reduced interfence with the exntra and oral muscles
the tongue and the lips and cheeks are at equilibrium with oe another

32
Q

over dentures

A

gains support by covering one or more teeth, the roots of teeth been treated or implans

33
Q

indcations for over dentures

A

pt transitioning from partial to complete dentures
elederly pts with few remaiining teeth and mucosal born denture support
attrtion/erosion/abrasion
hypodontia
cleft palatle

34
Q

not to sue overdentures when

A

poor oh
caries risk high
erio status poor

35
Q

retention

A

rethe resitance to vertical movment of the dentures away from the tissues

36
Q

what provides retetnion

A

muscular - the lips, tongue, cheeks, mom
physical - adhesion/cohesion with salvia between denture and mucosa, surface thension, viscotiy

37
Q

how to acheive retetnion

A

large impression surface
accruace of fit - thin acrylic on fitting surface
denture fixatives
sft linings
post dam placmeent
extended flanges and good border seal

38
Q

Support

A

the resitance of the denture to occulsal y directed loards towards th etissues
acheived by soft tisses and the alvolar ridge
manidble - buucal shelf, retromolar pads, alveolar mucosa
maxialla - hard paalte, alevolar mucosa, zygomatic butress, resudal shelf

39
Q

Stability

A

resitance of denture to horizontal and rotational forces
use a light denture to help with gravity
ensure netural zone manintaed
good occulusion
upper muscles - buccinator, oris, levator anguli
lower muscles - buccinator, superior constrictor, depressor labii iferorisis

40
Q

crietiera for a denture base

A

dimensianally stable
radiopaque
non irritant
non toxic
insoluble
inexpensive
long shlef light
high softening temp
good asethetics
insoluble in water
high elastic limit
high thermal conductivity
high abrasion resisitance
high impact strength

41
Q

PMMA

A

advatanges - high softening temp, dimesinally stable. good aethetics
disadvatnages - radiolucent, low theraml conductivity

42
Q

PMMA issues

A

poroosity - gaseous due to monomer boiling away, contraction insuffiecnt pressure
granuiliaty - insufficent mixing ratio
crazing - due to the differnce in coeffeicnts between the acrylic base and porcelain teeeth
residual monomer - can casue irritation

43
Q

Mandible

A

suppport - buccal shelf, alevolar residular ridge
limign - buccal and lingual sulcus and frenum, retromolar pads
relief - genia ltubercles, tori, mylohyoid rdige

44
Q

Maxialla

A

support - ruguae, hard palate
relief - plataine fovea, incisal papille, palatine fovea
liminting - buccal and lingual frenum and sulucus, hamular notch

45
Q

Static occlusion

A

contact ebtween the teeth when the madnible is not moving

46
Q

Dynamic occlusion

A

contacts made betweenthe teeth when the mandible s moving

47
Q

ICP

A

occlusion the person makes with theri teeth when they bite down in mainmum intercuspation - centric occlsuion

48
Q

Kennedy classes

A

class 1 - unilateral free end
class II - biltaeral feee end
class III - bilateral bounded
class IV - anterior bonunded

49
Q

craddock classes

A

claa 1 - tooth borne
class ii - mucosa borne
class III - tooth and mucosa borne

50
Q

Aims of dental surverying

A

to determine the path of insertion
to determine the presence of guide planes
to provide survery lines to check for preence of undercuts adn depth/position

51
Q

Guide planes

A

an extra area of retention close to the base and parallel to the path of insertion

52
Q

Clasps

A

0.155mm ot engage a 0.25mm undercut

53
Q

undercut guages

A

0.25mm - cocr
0.5mm - gold
0.75mm - wrought S.S

54
Q

Reciprocation

A

an opposing element to the clasp arm which prvents too much pressure of the classp on the tooth

55
Q

Guide planes provine

A

incrases stability and appearance
reciprocation
prevent of clasp deformation

56
Q

Aims of rests

A

to prevent overuption of unopposed teeth
to allow even distrubution of occlulsal forces
indirect retention
reciprocation
to determine the axis of rotation in free end saddles
prevent movment of RPD towards mucosa

57
Q

issues with rest seats

A

can remove tooth tissue
can expose dentine
loss of occlusal stops when denture not worn

58
Q

Path of displacement

A

direction in which the denture dislodges during function and perpendicular to occlusal placne

59
Q

RPI

A

r = mesial rest
p- distal proximal guiding plate
I = i bar clasp

the denture saddle compresses on the oral mucosa and rotates around the mesial rest. the distal plate and the i bar move down and disengage from the tooth to avoid torque
it relieves stressts on the abutment tooth cclose to the free end saddle

FINALS!!! (20 decks)

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