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Treatment Planning > L7 - definitive > Flashcards

L7 - definitive Flashcards

1
Q

indirect restorations / fixed options

A

single units

multi units

implant supported crowns / bridges / splints

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2
Q

indirect restorations

A

partial dentures

full dentures

over dentures

implant supported or retained prosthetics

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3
Q

major options for material for crowns

A

gold / metal (semi-precious and non-precious)

porcelain / resin and hybrid ceramics

combinations of porcelain and metal

resin and metal

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4
Q

onlays vs amalgam and composites

A

amalgam and composite wear and stain and breakdown and must be replaced – finite life span and inlays use material with a LONGER life span

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5
Q

ceramic vs metal inlays

A

ceramic and resin inlays are BONDED = REINFORCE the tooth structure

metal inlays are cementd but mat be looked at as a WEDGE placed in the tooth – because of the divergent preps so create force

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6
Q

use of onlays

A

used to restore larger lesions with a material that has a long life span and to shoe or SUPPORT / PROTECT CUSPS

  • amalgam onlays
  • composite onlays (wear and stain and breakdown and have to be replaced - FINITE life span)
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7
Q

describe metal onlays - pros and cons

A

are cemented and are an excellent long term restorative option

pros

  • RETAIN much of the natural tooth anatomy – can be used anywhere
  • good for patient with parafunctional habits

cons

  • not good against porcelain
  • looked at as a aesthetic concers
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8
Q

good onnlay choice for parafunctional habit problems

A

metal

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9
Q

composite is what type

A

direct

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10
Q

what influences success of composite

A

size
location
isolation
occlusla forces

caries risk / hygeine (like amalgam could be less leakage?)

parafunctional habits

operator skills

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11
Q

pros of composite

A

tooth colored - bonded - seals and useful in small occlusal and interproximal lesions

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12
Q

cons of composite

A

micro -leakage, sensitivity, technique sensative

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13
Q

amalgam is good for and pros

A

restore defective in posterior teeth on the five surfaces of the tooth

missing cusps especially non functinal , core material

durable material long service life and works well in area where it is hard to visualize

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14
Q

inlay used for what size usually

A

like smaller lesiosn 1/3 width of tooth

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15
Q

ceramic and resin onlays are ___ to tooth? vs metal

A

BONDED

metal = cemented

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16
Q

pros and cons of cerami and resin onlays

A

pros

  • reinforce the tooth structure
  • aethstic

cons
- ceramics are subject to fracture if adequate THICKNESS is not maintained

  • high skill level, technique sensative
  • not for all situations and teeth - selective usage = success
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17
Q

esthetic of PFM depend on

A

reduction

  • potential visiable metal margins
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18
Q

pros for use of PFM corwns

A

aesthetics compared to all metal

less aggressive prep than ceramic

multiple FINISH LINE OPTIONS

more places and conditions favor the use of PFM

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19
Q

bevels usually added when

A

situations where a shoulder is already present – and destruction by caries previous restoratins

facial of metal ceramic

metal restorations

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20
Q

shoulder use

A

all ceramic and margin of PFM crowns

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21
Q

radial shoulder

A

rounded shoulder – round ended tapered diamond ceramics need this

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22
Q

indications for chamfer

A

cast metal crowns and metal only portion of PFM crowns

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23
Q

heavy chamfer

A

ALL CERAMIC

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24
Q

cavo surface of chamfer

A

90 degrees but with havy – need a round end taperes

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25
indication for knife edge margin
mandibular posterior teeth with very CONVEX axial surfaces lingually tilted lower molars
26
knife edge permit
acute margin of metal thin margin suscetible to distortion
27
decision of PFM vs ceramic usually comes down to
finish line, location, and occlusion
28
prepare tooth and less than ___ there is a problem
less than 3 mm
29
which biotype for which type of crown
thick - pfm will work thin -- porcelain
30
canine guidance and crown material vs group fucntion
canine guidance -- may want to think about PFM grouo function -- forces more distributed can do porcelain
31
clearance vs reduction
reduction -- to only the tooth -- to satisify the material using on that tooth clearance -- in relationship to the other arch
32
two unit bridge aka
cantilever
33
cantilever details
forces are put onto the pontic which is a potential problem axis of rotation -- is a lever
34
PFM connectors in bridge vs ceramic
PFM 4.5 square mm ceramic 16 square mm
35
if you are going to bond a bridge in what do you need to consider?
do you have enough etchable tooth structure?
36
connector sizze is determined by
measuring the height from the gingival to incisal or occlusal as well as the width measured from buccal to lingual
37
guidelines for one pontic if zirconia in posterior and anterior
ceramics 9 square mm in posterior 7 square mm in anterior
38
guidelines for one pontic if lithium disilicate in posterior and anterior
16 square mm in posterior 12 square mm in anterior
39
case for marilyn bridge?
younger patients one wing?
40
pre-requisite for veneers?
need enamel present -- because needed to be bonded to this
41
veneers shade change dictates?
PORCELAIN THICKNESS
42
A3 to A0 requires?
0.6mm to 0.8mm reduction to achieve that change
43
main thing to think about when going to bond something
% of enamel left and locatino of that enamel
44
signs of overload
enamel crazing, abfraction lesions
45
signs of occlusal trauma
gingival recession and wear patterns
46
flexural risk assessment looks at
highest stress before rupture
47
rank materials from lowest MPa to highest
feldspathic leucite-reinforced lithium disilicate glass-filled alumina zirconia
48
pascal =
pressure measurement 1 newton per square meter
49
MPa=
1 million Pa
50
bond strength to dentin =
19 MPa - 2756 psi
51
Emax bond strength
360-400 Mpa = 52k-58k psi
52
zirconia bond strenght
1170 MPa
53
lithium dislicate aka
emax
54
achilles heel of porcelain
shear and tensile stress assessment
55
stress - resist failure?
according to the load applies -- so it is variable -- force exerted on a material like remove a bonded bracket from a tooth requires stress failure of the composite
56
implication of flaw in ceramic?
that is where stress will concentrate -- propagation of cracks -- yield to relieve stress and get DEFORMATIN
57
Deformation occuring?
in high stress area with no or little enamel
58
reduce the rotation radius?
put grooves in the axial walls
59
strength is derived from? implication of this?
derived from the ENAMEL - so no enamel then high strength ceramic or a core material must be used necessary to overcome deformity of the ceramic material
60
flexural strength
deformation / bend
61
tensile strength
resist pull apart
62
shear strength
how hard it is to cut -- like paper and scissors
63
if using zironia what must you do at end?
POLISH
64
most ceramics are made how now?
milled or pressed
65
requirements for milled ceramics
need HIGH SHEAR STRENGTH OR THICKNESS of material AT THE EDGE / MARGIN of the restoration
66
sharp areas in ceramics?
concentrate stress -- enemy
67
polish or glaze?
polish trumps glazing
68
implant supported removable in terms of soft ttissue?
soft tissue becomes LESS of a problem
69
what do you need in a patient?*
stable periodontal condition overall free of carious lesions STABLE OCCLUSION
70
what would i like in a patient?*
class I occlusion anteriorly and posteriorly existing canine guidance no occlusal interferences
71
major reasons for planing for a removable option
stabalize a denture replace missing occlusal support function

Treatment Planning (9 decks)

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