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GLAS JONOMERIu restaurativnoj stomatologiji
Vise lica glas jonomer cementa
• GJC – sta su?•
GJC – kategorije?• GJC – okolne reakcije?
• GJC – otpustanje F i njegovo stvaranje
• GJC – aplikovanje?
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1970 1980 20001990
Dentalni amalgam
Dentalni kompoziti
Glas jonomeri
Prvi GJC 1972.godA.S.P.A.
A.S. = Aluminosilicatno stakloP.A. = Poliakrilicna kiselina I voda
RAZVOJ
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Glass jonomer : “glass” (staklo) odnosi se nastaklaste keramicke partikule I staklasti matriks (ne-
kristalni), a termin jonomer se odnosi na jonskivezivni polimer.
TERMINOLOGIJA
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Si, Na,
F, Ca,
Al
H2O,
H3PO4,
Al, Zn
+
Ca+2
Al+3
F-
Si+4
H+
Glasspartil
Etchedi
Ca, Al, ,
Phosphat
Fluorides
Silikatni cement
ZnO
H
2
OPAAZnO
+
C
HOOCCOOHOOC
-OOCCOO-
-OOCCOO-Zn++Zn++COO-
-OOCCOO--OOC
ResidualZnOZincl
l
Polikarboksilatni cement
GLAS JONOMERIHIBRID = SC [prah] i PCC [tecnost] = A.S.P.A.
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SiO2,Al2O3,Na, Ca,
F
PAAin
H2O
SiO2,Al2O3,Na, Ca,F
Rezidualne staklene partikule Poliakrilatni hidrogel(prvobitno Ca poliakrilatni gelkasnije Al poliakrilatni gel)
Si+4, Al+3, Ca+2, Na+, F- joni
SiO2,Al2O3,Na, Ca,
F
Si+4 Al+3 Na+ Ca+2
F-
PAA
H2O
GLAS JONOMERIHIBRID = SC [prah] i PCC [tecnost] = A.S.P.A.
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COO¯
COO¯
¯ OOC
COO¯
COO¯
COO¯
COO¯
¯ OOC
¯ OOC
¯ OOC
¯ OOC
Al+3
--O-Si+4(OH)2
Ca++
Ca+
Ca+
¯ OOC
¯ OOC
COO¯¯ OOC
COO¯
F-Al-SiO2
CaF2
H-O-H
H-O-H
H-O-H
H-O-H
H-O-H
Ca+2 Al+3
Si+4
F-
REAKCIJE GJC
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UniverzalniCEMENTI
GI
KOMPOZIT
HYDROGEL
Hidrofobni POLIMER
RM-GJC
GJC iVLC hidrofilni monomer
I polimer
CEMENTI
MM-GJCGJC iMetallic fillersCermet fillers
CORES
KOMPOMER
VLC kompozit i izvor Fluora
RESTAURATIVNI MATERIJAL
RR-GI
GI andResin-Fillers
A.R.T. andTEMPORARIES
JONOMER
VLC kompozit i Pre-reaktivni GJC prah
RESTAURATIVNI MATERIJAL
CEMENTI
RESTAURATIVNI MATERIJAL
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FLUORO-ALUMINO-SILICATE
PARTICLE
CEMENT
MATRIX
F-1,Ca+2, Al+3, Si+4
Initialdissolution
forstartingreaction
rapid earlyF release
from matrixSlow long term
F releaseby diffusionfrom particle
OTPUSTANJE FLUORIDAFluoride comes from matrix and particles at different rates.
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EFFECTIVE LEVELS
20
10
15
5
14 21 2870
TIME (Days)
F L
U O R I D E R E
L E A S E ( p p
m )
Fluoride Toothpaste,Topical Fluoride,Fluoride Mouthrinse
PARTICLES
M A T R I X
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Mjor IA. Glass ionomer cement restorations and secondary caries: apreliminary report. Quintessence Int 1996;27(3):171-174.
Glass Ionomer
Composite
Amalgam
Replacement rate (%) for secondary caries
0 20 40 60 80 100
CARIOSTATIC EFFECTSGI is not more effective than composite or amalgam.
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1. Cement2. Liner / Base3. Restoration4. Core / Foundation5. (Tunnel Restoration)6. (Sandwich Restoration)7. Retrograde Filling Material8. P/F Sealant9. Root Caries Cervical Restoration10. Temporary, or ART Restoration
Technical modifications:> P/L Precapsulated> Addition of etching and then BA> Addition of different reinforcing fillers> Finer and finer particle sizes
General Properties:> Strength> Adhesion> Biocompatibility> Fluoride release
APPLICATIONSGI have been tried for about every conceivable application.
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COMMERCIAL PRODUCTS
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Hytac
Vitremer
Ketac-Cem Dyract Flow
Fuji Miracle Mix
SOME PRODUCTS
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Fuji IX
Now being used as permanent restoration in pedodontics.
Developed as temporary restorations for 3rd world countries.First tested in African countries.Now used widely in Asian countries.
Current technique = P/L or precapsulated mixture.Original technique = scoop, finger mix, finger insertion.
A.R.T. RESTORATIONSART = Atraumatic Restorative Technique
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“WHO” Global A.R.T. Project Atraumatic Restorative Treatment (ART) = prevention and treatment of
dental cariesbased on excavating and removing caries using handinstruments only and restoring glass ionomer.
Fuji IX GP
Minimal equipment and instrumentation
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TEMPORARY RESTORATIONSFuji IX Dominates the Landscape
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