44606439 Curs 2 Cimenturi Ionomere de Sticla
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Transcript of 44606439 Curs 2 Cimenturi Ionomere de Sticla
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CIMENTURI IONOMERE DE CIMENTURI IONOMERE DE STICLA SAU GLASS STICLA SAU GLASS
IONOMEREIONOMERE
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DEFINITIE:DEFINITIE:
Matrice polimerica + Particule de sticlaMatrice polimerica + Particule de sticla
Acid poliacrilic + Particule de sticla (pudra de Al Acid poliacrilic + Particule de sticla (pudra de Al – silicat, continand Ca + F) – silicat, continand Ca + F) ioni Al, Ca, F, Si ioni Al, Ca, F, Si
Ca++ ioni carboxil Ca++ ioni carboxil retea = gel polimeric amorf retea = gel polimeric amorf
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ISTORICISTORIC
= primele cimenturi: pudra alumino-silicat + = primele cimenturi: pudra alumino-silicat + policarboxilatpolicarboxilat
= ASPA = ASPA
= imbunatatiri:= imbunatatiri:
- acid poliacrilic, copolimerizat cu: acid - acid poliacrilic, copolimerizat cu: acid maleic, itaconic si/sau tartaricmaleic, itaconic si/sau tartaric
- micsorarea marimii particulelor pulberii- micsorarea marimii particulelor pulberii
- particule de Ag-Sn = MIRACLE MIX- particule de Ag-Sn = MIRACLE MIX
- particule de Ag-Pd = CERMET- particule de Ag-Pd = CERMET
- cimenturi GI hibride = rasini ionomere - cimenturi GI hibride = rasini ionomere
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COMPOZITIE
LICHID: sol 47,5% de 2:1 copolimer acid poliacrilic/acid itaconic in apa
PULBERE: sticla de Ca-F - alumino-silicat
SiO2 - Al2O3 - CaF2 - Na3AlF6 - AlPO4
- acid introdus in pulbere --> lichid = apa distilata
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REACTIA DE PRIZA:REACTIA DE PRIZA: Acid + Baza Acid + Baza
Structura: Structura:
- particule de sticla inconjurate de un gel de - particule de sticla inconjurate de un gel de silice intr-o matrice formata din polianioni silice intr-o matrice formata din polianioni
ramificata prin punti ioniceramificata prin punti ionice
- mici particule de gel ce contin cristale de - mici particule de gel ce contin cristale de fluorfluor
CIS este legat chimic de smalt si dentina in timpul CIS este legat chimic de smalt si dentina in timpul reactiei de prizareactiei de priza
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PROPRIETATI:PROPRIETATI:
- contractie minima dupa priza - contractie minima dupa priza
- aderenta - aderenta - la dentina: retentie mecanica - la dentina: retentie mecanica si chimicasi chimica
- la compozite: fizica + chimica- la compozite: fizica + chimica
- rezistenta: - rezistenta: - foarte buna la presiune- foarte buna la presiune
- relativa in mediul acid- relativa in mediul acid
- slaba la abrazie- slaba la abrazie
- solubilitatea mai mare ca pt alte cimenturi- solubilitatea mai mare ca pt alte cimenturi
- insuficient de fizionomice- insuficient de fizionomice
- timp de priza 4-8 min- timp de priza 4-8 min
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PROPRIETATI BIOLOGICEPROPRIETATI BIOLOGICE
- biocompatibile:- biocompatibile: - cu pulpa dentara- cu pulpa dentara
- cu parodontiul marginal- cu parodontiul marginal
-grosime dentina < 0,5mm grosime dentina < 0,5mm protectie pulpara protectie pulpara
- sensibilitate asociata microinfiltratiei redusesensibilitate asociata microinfiltratiei reduse
- proprietati anticariogene proprietati anticariogene eliberare de fluor in eliberare de fluor in timpul prizei si dupa priza secundaratimpul prizei si dupa priza secundara
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CLASIFICARE:CLASIFICARE:
Tip ITip I: : pentru cimentari – dimensiune fina a pentru cimentari – dimensiune fina a particulelor particulelor film de 25 microni film de 25 microni
FUJI 1 (GC INTERNATIONAL CORP)FUJI 1 (GC INTERNATIONAL CORP)
KETAC CEM (ESPE PREMIER)KETAC CEM (ESPE PREMIER)
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KETAC CEMKETAC CEM- cimentari de coroane, inlay,- cimentari de coroane, inlay, onlay, stifturi, bracketonlay, stifturi, bracket-radioopacradioopac-elibereaza Felibereaza F-solubilitate <solubilitate <-rezistenta la compresiunerezistenta la compresiune
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TEHNICA DE LUCRUTEHNICA DE LUCRU
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CLASIFICARE:CLASIFICARE:
Tip II:Tip II: - materiale de obturatie- materiale de obturatie- in general autopolimerizabile- in general autopolimerizabile
FUJI 2FUJI 2KETAC FILKETAC FILKETAC MOLARKETAC MOLARPHOTAC FILPHOTAC FIL
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KETAC MOLARKETAC MOLAR- condensabilcondensabil- elibereaza Felibereaza F- restaurari dinti posteriori, dinti - restaurari dinti posteriori, dinti temporari,bonturi, baza sub temporari,bonturi, baza sub compozitcompozit
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GC FUJI IIGC FUJI II- autopolimerizabil - autopolimerizabil
- restaurari cls. III si V- restaurari cls. III si V
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GC FUJI IXGC FUJI IX- autopolimerizabilautopolimerizabil- condensabilcondensabil- restaurarirestaurari
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CLASIFICARE:CLASIFICARE:Tip III: Tip III: MATERIALE PENTRU BAZE SI LINERIMATERIALE PENTRU BAZE SI LINERI
III A: - mai putin rezistente:III A: - mai putin rezistente:* biocompatibilitate pulpara buna* biocompatibilitate pulpara buna* radioopace* radioopace* autopolimerizabile* autopolimerizabile
Ex: GC LINING CEMENT; SHOFU LINEREx: GC LINING CEMENT; SHOFU LINER
III.B: - rezistenta mai mare:III.B: - rezistenta mai mare:* radioopace* radioopace* aciditate crescuta* aciditate crescuta* autopolimerizabile* autopolimerizabile* utilizate ca baze* utilizate ca baze
Ex: KETAC BOND; SHOFU BASE; GC DENTIN CEMENTEx: KETAC BOND; SHOFU BASE; GC DENTIN CEMENT
III.C: - materiale fotopolimerizabile:III.C: - materiale fotopolimerizabile:* radioopace* radioopace* rezistente si stabile in strat subtire* rezistente si stabile in strat subtire
EX: VITREBONDEX: VITREBOND
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CLASIFICARE:CLASIFICARE:Tip IV: Tip IV: CIMENTURI GI IN AMESTECCIMENTURI GI IN AMESTEC
- Ag, Au, particule amalgam- Ag, Au, particule amalgam- priza chimica- priza chimica- rezistenta mecanica < decat materialele - rezistenta mecanica < decat materialele conventionaleconventionale- utilizate pentru reconstituiri de bonturi- utilizate pentru reconstituiri de bonturi
Ex: KETAC SILVER Ex: KETAC SILVER MIRACLE MIXMIRACLE MIXCERMETCERMET
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INDICATII:INDICATII:
- lineri si baze – sub obturatii compozit, amalgamlineri si baze – sub obturatii compozit, amalgam
- restaurarea dintilor temporarirestaurarea dintilor temporari
- restaurarea cavitatilor de clasa III si V pe dinti restaurarea cavitatilor de clasa III si V pe dinti permanentipermanenti
- restaurarea eroziunii, milolizeirestaurarea eroziunii, milolizei
- sigilarea fosetelor si santurilor ocluzalesigilarea fosetelor si santurilor ocluzale
- reconstituiri de bonturireconstituiri de bonturi
- cimentaricimentari
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TEHNICA DE APLICARE:TEHNICA DE APLICARE:
Mod de preparare:Mod de preparare:
- proportia pulbere/lichid = 3/1- proportia pulbere/lichid = 3/1
- bloc de hartie cerata- bloc de hartie cerata
- spatule din material plastic- spatule din material plastic
- timp de amestec 30-45” sau 10” (capsule)- timp de amestec 30-45” sau 10” (capsule)
- timp de lucru 2’- timp de lucru 2’
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TEHNICA DE APLICARE:TEHNICA DE APLICARE:Mod de aplicare:Mod de aplicare:•izolarea dintelui – CIS foarte sensibil la izolarea dintelui – CIS foarte sensibil la
contaminare cu apa in timpul prizeicontaminare cu apa in timpul prizei• tratarea suprafetei eroziunii tratarea suprafetei eroziunii
- acid poliacrilic 10% - 20” (CONDITIONER - acid poliacrilic 10% - 20” (CONDITIONER liquid)liquid)
- acid citric 50%- 30”- acid citric 50%- 30” - spalare- spalare- mentinerea izolarii stricte- mentinerea izolarii stricte
• aplicarea materialului lipiciosaplicarea materialului lipicios• priza aproximativ 7’priza aproximativ 7’• izolare cu lac sau adeziv fotoizolare cu lac sau adeziv foto• finisarea – rapida – gume + spray apafinisarea – rapida – gume + spray apa• reaplicarea lacului reaplicarea lacului
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SISTEM DE CAPSULE ESPESISTEM DE CAPSULE ESPE
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PREPARAREA AMALGAMULUI:PREPARAREA AMALGAMULUI:
* manuala* manuala
* mecanica:* mecanica: - DENTOMAT- DENTOMAT
- SILAMAT- SILAMAT
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CIMENTURI IONOMERE CIMENTURI IONOMERE FOTOPOLIMERIZABILE SAU HIBRIDEFOTOPOLIMERIZABILE SAU HIBRIDE
COMPOZITIE:COMPOZITIE:
Autopolimerizabile:Autopolimerizabile:
- pulbere: sticla + persulfat de K + catalizator/ac. ascorbicpulbere: sticla + persulfat de K + catalizator/ac. ascorbic
- lichid:sol. apoasa monomer complex + HEMA + ac tartariclichid:sol. apoasa monomer complex + HEMA + ac tartaric (gr. carboxil + vinil)(gr. carboxil + vinil)
Fotopolimerizabile:Fotopolimerizabile:
- pulbere: sticla F, Al, Sipulbere: sticla F, Al, Si
- lichid: copolimer ac. acrilic + ac. maleic + HEMA + apa + lichid: copolimer ac. acrilic + ac. maleic + HEMA + apa + camforochinona + activatorcamforochinona + activator
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PROPRIETATI:PROPRIETATI:
- auto sau fotopolimerizabileauto sau fotopolimerizabile
- contractie de priza minimacontractie de priza minima
- mai rezistente si mai aderente ca GImai rezistente si mai aderente ca GI
- estetica mai bunaestetica mai buna
- solubilitatea mai scazutasolubilitatea mai scazuta
- radioopaceradioopace
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GC FUJI II LC IMPROVEDGC FUJI II LC IMPROVED
- fotopolimerizabilfotopolimerizabil
- pentru restaurari cls. III, V dinti temporaripentru restaurari cls. III, V dinti temporari
- liner, baza, bonturiliner, baza, bonturi
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PHOTAC FIL QUICKPHOTAC FIL QUICK
(ESPE)(ESPE)
- ionomer cu priza rapida- ionomer cu priza rapida- fotopolimerizabil- fotopolimerizabil- restaurari cervicale - restaurari cervicale (disponibil in 8 nuante)(disponibil in 8 nuante)
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MANIPULARE:MANIPULARE:
- raport pulbere : lichid = 1,6g : 1g (consistenta - raport pulbere : lichid = 1,6g : 1g (consistenta cremoasa)cremoasa)
- timp de lucru 2,5’ timp de lucru 2,5’
- uneori adeziv dentinaruneori adeziv dentinar
- nu necesita acoperire cu lacnu necesita acoperire cu lac
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INDICATII:INDICATII:
- cimentari coroane, punti, inlay, DCRcimentari coroane, punti, inlay, DCR
- bazebaze
- fixare bracketurifixare bracketuri
- obturatiiobturatii
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COMPOMERIICOMPOMERII
Compozitie:Compozitie:
= rasina metacrilica carboxilata + umplutura = rasina metacrilica carboxilata + umplutura
CIS CIS conventionaleconventionale
CIS CIS modificate modificate cu rasinicu rasini
CompomeriCompomeri
CompoziteCompozite
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Avantaje fata de compozite:Avantaje fata de compozite:
- adeziunea la tesuturile dentareadeziunea la tesuturile dentare
- eliberarea de fluoreliberarea de fluor
Dezavantaje fata de compozite:Dezavantaje fata de compozite:
- nuantele si capacitatea de finisarenuantele si capacitatea de finisare
- rezistenta scazuta rezistenta scazuta
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Avantaje fata de CIS:Avantaje fata de CIS:
- estetica superioaraestetica superioara
- nu mai contine elemente ce trebuie amestecate nu mai contine elemente ce trebuie amestecate
- modificari dimensionale mai mici in timpmodificari dimensionale mai mici in timp
- manipulare si capacitate de modelare mai bunamanipulare si capacitate de modelare mai buna
- capacitate de finisare mai bunacapacitate de finisare mai buna
Dezavantaje fata de CIS:Dezavantaje fata de CIS:
- consistenta nu poate fi modificataconsistenta nu poate fi modificata
- exista numai variante fotopolimerizabileexista numai variante fotopolimerizabile
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INDICATII:INDICATII:
- cavitati de clasa V si eroziuni cervicalecavitati de clasa V si eroziuni cervicale
- leziuni carioase radiculareleziuni carioase radiculare
- cavitati clasa I si II pe dinti temporaricavitati clasa I si II pe dinti temporari
- cavitati clasa III cavitati clasa III
- refaceri de bonturirefaceri de bonturi
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TEHNICA DE APLICARE:TEHNICA DE APLICARE:
- alegerea nuanteialegerea nuantei
- curatarea dcuratarea dintelui cu perii si paste abrazive intelui cu perii si paste abrazive
- izolarea dintelui izolarea dintelui
- protectia pulpara daca este nevoie, cu baza protectia pulpara daca este nevoie, cu baza
- aplicarea primer/adeziv pentru compomeriaplicarea primer/adeziv pentru compomeri
- aplicarea compomerului pentru restaurariaplicarea compomerului pentru restaurari
- fotopolimerizareafotopolimerizarea
- finisareafinisarea
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Courtesy of Dr. E. Russo, Viterbo, Italy
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Enamelmin.
15 sec
Dentinemax.15 sec
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20 - 30 sec Apply
10 - 20sec Light cure
Soft blow
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Repeat ifnot glossy
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Filtek A110Filtek A110