laminate veneers

8/13/2019 Laminate Veneers

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Laminate veneersLaminate veneers

( under-graduate)( under-graduate)


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A veneer is a thin covering that is bonded to thefront (visible) part of the tooth.

TYPES O L!"#$!TE %E$EE&S'

#ncisalvie

1. Direct1. Direct

ustom made laminatesustom made laminatesComposite resin materialComposite resin material

CeramicCeramic

2. Indirect2. Indirect

ustom made laminatesustom made laminatesComposite resin materialComposite resin material

Preformed stoc* laminatesPreformed stoc* laminatesComposite resin materialComposite resin materialCeramicCeramic(lumineers direct and(lumineers direct and

indirect )indirect )

AcrylicAcrylic

(($OT +SE,$OT +SE,

anmore)anmore)


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hen adding omposite resin for a direct veneer e ma'

/) +se a labial cron form.

0) !dd .&. free-hand.

Composite resin materialComposite resin materialAcrylicAcrylic

1. Temporary1. Temporary

Composite resin materialComposite resin material

CeramicCeramic

2. Permanent2. Permanent

DirectDirect

(inside the mouth)(inside the mouth)

Light-cured composite resin build up toLight-cured composite resin build up toonla the entire visible etched enamelonla the entire visible etched enamel

surface.surface.


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/) +se a labial cron form.

0) !dd .&. free-hand.

Labial cron form tried onLabial cron form tried on

toothtooth


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!dvantages Of ,irect omposite %eneers

Onl one appointment is re1uired.

The dentist directl controls color and form.

ost is reduced.

&epairable.

,isadvantages Of ,irect omposite %eneers

Time consuming.

&e1uires artistic s*ills.

E2hibit poor color stabilit and ear resistance.

hat are Lumineers porcelain veneers3

Lumineers porcelain veneers are a readmade

veneers made out of the patented porcelain erinate.

2.Indirect2.Indirect(outside the mouth)(outside the mouth)

Preformed stoc* laminatesPreformed stoc* laminates

Ceramic (lumineers)Ceramic (lumineers)


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erinate is an e2ceptionall strong tpe of porcelain

and this propert allos Lumineers veneers to be

fabricated e2tremel thin.

The thic*ness of Lumineers veneers can be as little

as 4.0 to 4.5 mm (along the same lines as a contact

lens). #n comparison traditional porcelain veneers

tpicall re1uire a minimal thic*ness of around 4.6

mm.

The cost from 7844.44 - 7//44.44 per Lumineers

veneer.

!dvantages Of Lumineers

Onl one appointment is re1uired.

E2tremel thin ( 4.0-4.5 mm)


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"anufacturer claims9 no drilling no shot protocol.

,isadvantages Of Lumineers

Poor fit beteen teeth and laminates.

+nevenl thic* cement laer.

Liabilit of over-contouring and subse1uent gum

disease and inflammation .

Tooth deca.

E2pensive.

!ccording to a statistical stud dran up b :;rich

+niversit< the failure rate of ceramic laminate veneers isnot more than 6= in 6 ears< i.e. ver similar to that of

highl popular metal-ceramics.

2.Indirect2.Indirect(outside the mouth)(outside the mouth)

ustom made laminatesustom made laminatesCeramicCeramic


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!dvantages

/. "inimall invasive treatment method. #t utili>esminimal tooth preparation mainl confined ithin enamel.

?eeping clear of the gingival margins.

0. Tissue response.

"inor degree of tissue damage during preparation or

ta*ing an impression (usuall supragingival finish

line).

@la>ed porcelain is highl biocompatible.

5. Shape< position and surface appearance can be

modified.

hange canine into lateral incisor< adAust tooth length or

transform surface te2ture permanentl and elegantl .


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B. Effective color change.

hen bleaching techni1ues becomes ineffective< laminate

veneers ma be the treatment of choice.

6. Light transmission.

#f the tooth is not stained the laminate veneer should

transmit light progressivel through its thic*ness < cement

and tooth structure giving a natural appearance .

C. ,urabilit.

eramic laminate veneers sho e2cellent biologicalation.

,ifficult to adAust the margins and the provisional

cementation is complicated.

6. ,ifficult in color matching.

Precise matching of a desired shade can be difficult


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C. Post-firing modifications.

eramics can not be re-fired once removed from its

support (not applied to the #PS Empress).

8. #nabilit to trial cement the restoration.

#t can not be retained b temporar cement for evaluation.

D. Liabilit to fracture.

Laminates are e2tremel fragile during the tr in and

cementation phase.

. Fonding procedures.

!t the bonding stage< the slightest error can mean failureation can be

completed in the laborator.

). %tchin" of tooth

58= phosphoric acid' for enamel areas (54 seconds)

and for dentin areas (/6 seconds) olloed b rinsing and dring.

#t creates micromechanical retention.

$e generation dental adhesives adhere to the

enamel and dentine simultaneousl. !ll products

should be applied to a slightl moist surface. ,ring

ithout actuall dring out is re1uired.

*. Primer on the tooth and the laminate !eneer

Spread o B-6 laers< leave for 54 seconds and dr.

The primer promotes intimate bonding beteen the

tooth< composite and ceramic.

+. ementin"


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The laminate veneer is eased into place accuratel

e2erting a stead moderate pressure. #ts held in

place b9

! special instrument ( !ccu-placer )

! a2 ball mounted on a plastic handle

! Flu-Tac* ball at the end of a large condenser.

The strips pulled off in a lingual direction.

,. Remo!al of excess cement

Frushes< scalpels (ith straight blades)< dental flossand plastic strips.

E2cess soft composite should be cleared aa before

curing.

-. #i"ht curin" for li"ht cured and dual cured

cements/

Laminates held in place b a2 or !ccu-placer orlarge condenser support< light curing .

Light curing must ta*e place from angles to ensure

complete cure.

10. Finishin"

Strips< scalpel


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Causes:

a) Inadequate porcelain thickness (insufficient reduction)

b) Inadequate retention to the tooth

c) Faulty case selection (e.g. parafunctional habits)

!. Chipping

Fracture does not e"pose tooth structure.

#mooth$ then$ polishing %ut$ &ith surface defect

$.acid etch$. silane application

and$..composite placement.

'. oor esthetics

Causes:a) Improper shade cement

b) Improper shade selection

c) Incomplete masking to the discolored tooth

d) *ercontouring (improper reduction)

+. ,ecreased marginal integrity and discolorationCauses:

a) -se of luting cement ith lo ear resistance

b) Cracks and fractures

/. Incomplete fit of the laminate

Causes0

a) Improper impression

b) -se of thick adhesi*e (consistency) making it difficult to seat thelaminate properly.


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c) resence of contaminant on the fitting surface

d) *ere"tension of the gingi*al margins

. ,ebondingCauses:

a) Inability to pro*ide dry field during cementation

b) oor manipulation of the cement

c) Inability to a*oid contamination of etched enamel (or laminate)

d) -nsteady laminate during setting of the cement

2. Caries

Causes:

a) ,efecti*e margins

b) 3icroleakage

c) oor oral hygiene

d) 4emaining caries during preparation

5. 6ypersensiti*ity

&ith e"posed dentin after preparation and not protected

7. atient discomfort

a) Improper contact (food impaction)

b) oor esthetics

laminate veneers

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