GLAS JONOMER CEMENTI

8/4/2019 GLAS JONOMER CEMENTI

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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?



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



Glass jonomer : “glass” (staklo) odnosi se nastaklaste keramicke partikule I staklasti matriks (ne-

kristalni), a termin jonomer se odnosi na jonskivezivni polimer.

TERMINOLOGIJA



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.



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.



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



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


CEMENTI




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.



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



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.



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.



COMMERCIAL PRODUCTS



Hytac

Vitremer

Ketac-Cem Dyract Flow

Fuji Miracle Mix

SOME PRODUCTS



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



“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



TEMPORARY RESTORATIONSFuji IX Dominates the Landscape



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GLAS JONOMER CEMENTI