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8/9/2019 S.S Resto notes
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lure of
ental Restorati
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De nition :
It is Inability or inadequacyofa dental restoration or
prosthesis to perform asexpected.
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What is Success ?
he criteria of success of a dentalrestoration include :
Restoration remains inte!ral and in place.
"bsence of recurrent #aries.$ar!inal accuracy and adaptation.%erfect aesthetics.$aintain perfect anatomy and relations&ith nei!hborin! and opposin! teeth andperiodontal Structures.%atient comfort and satisfaction .
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'eneral #auses of Failure :
#auses of failure can be listed aseitherinherent factors or induced factors :
() Inherent Factorsou!h conditions in the oral ca*ity:Di+erent ypes of Stress.
emperature ,uctuations.%- #yclin!.-umidity.$icro)or!anisms.Shelters and sta!nation areas
#auses of failure can be listed aseitherinherent factors or induced factors :
() Inherent Factorsou!h conditions in the oral ca*ity:Di+erent ypes of Stress.
emperature ,uctuations.%- #yclin!.-umidity.$icro)or!anisms.Shelters and sta!nation areas
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'eneral #auses of Failure :
) Induced Factors$is/ud!ment in selectin! the correctrestorati*e material.
Incorrect desi!n of ca*ity preparationImperfect manipulation of therestoration .
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Failure ofDentalcomposite
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#auses of composite failures :
(. Incomplete remo*al of carious lesion. incomplete etchin! or incomplete remo*al of residual
acid from tooth surface
0. 1xcess or de cient application of boundin! a!ent .
2. 3ac4 of moisture control .5. #ontamination of composite &ith n!er 6 sali*a .
7. follo&in! bul4 placement technique durin!polymeri8ation of composite .
9. Improper polymeri8ation method .
. Incomplete nishin! and polishin! of composite .
;. Inadequate occlusion of restored tooth .
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Follo&in! failures are commonly seen incomposite restoration &ith time :
#auses of composite failures :
Discoloration
Secondary carie s
'rossfracture of
restoration
%ostoperate
sensiti*ity
Fractureof
mar!ins
3oss of
contact
"ccumulation of
plaque
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'uideline to minimi8e compositefailure :
(. he tooth preparation should be 4ept as small aspossible since composite in bul4 lead to failure .
. "*oid sharp internal line an!les =&hich increase stressconcentration.
0. Deeper preparation should be !i*en base of #"> -@ or
'I cement.2. Strict isolation is to be follo&ed.
5. "*oid inadequate curin! =since it lead hydrolyticbrea4do&n of composite.
7. Ase small increments= holdin! each increment &ithe,on coated instruments.
9. Fill proximal box separately and create proper contactareas .
. #omposite =especially at be*eled areas =should benished and polished properly.
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Repairin! composite restorations :
Restoration is indicated for replacement&hen any of follo&in! occurs :
Secondary caries &hich cannot be remo*eddurin! repair procedure.
Beed for aesthetics.
%resence of pulpal patholo!y
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#onclusion :
(. he criteria of success of a dentalrestoration include many factor
.#auses of failure can be listed as either0.inherent factors or induced factors
2.Failures in amal!am restoration are notusually because of poor material5.Durin! ca*ity preparation the failure occuar
at *arious step
7. he tooth preparation should be 4ept assmall as possible since composite in bul4lead to failure
9.#omposite =especially at be*eled areas=should be nished and polished properly.
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