Transcription of Advances in glass-ionomer cements - miseeq.com
1 JournalOfMinimumInterventionInDentistryJ MinimIntervDent2009;2(1)-3-AbstractThisa rticledescribestheproperties, ;14 , , , ,butrequiresabio-medicalapproach,thatles s-invasivetechniquesarepossible,thatbio- compatibilityrequiresincreasedinterest, ,astheydemandmoreaesthetics, ,threeessentiallydifferentmaterialsareat ourdisposal:amalgam, ,in1993,30%wereperformedintoothcoloureda lternativesforamalgam;in1997thisnumberwa s50%andin2002thisnumberwas70%! ! ;2(1) ,theofficialstandpointisthatthereisnosci entificevidencethatamalgamisaserioushaza rdforthepatient,whilstthedentalteamcanbe atriskofmercurypoisoning, , ,therestorationshouldbeasbulkyaspossible ,andbyabsenceofadhesion, ( extensionforprevention ).Today,theopinionholdsthat,ifprevention hasfailed, , , , ,theheavilyfilledresin-basedcompositeswi thsmallerfillerparticlescancompetemoreor lesswithdentalamalgaminmechanicalperspec tive(Table1).
2 Withthelatestgenerationsofadhesivesandre storativematerials, ,theplacementprocedureseemseasyandstraig htforward:minimalcavitypreparationwithou tspecialattentionformacro-mechanicalrete ntion,recommendedbondingprocedureandplac ementismandatory, ;morethanbefore, , (KHN)360601003090 Compressivestrength(MPa)250280360260300 Tensilestrength(MPa)35260604050 Elasticmodulus(GPa)50123030614 JournalOfMinimumInterventionInDentistryJ MinimIntervDent2009;2(1) , , , , ,resin-basedcompositesmaycontributetover ysatisfyingdentistry, , , ,whichdemandhighlyskilleddentistsforthec reationofreliableanddurablerestorationsa relessdesirableintheperspectiveofreducin gthecontinuing, (EUManualofDentalPractice2000)CountryAct ivedentistsInhabitantsInhabitants/dentis tAustria378981000002138 Belgium7600100200001342 Denmark503953000001052 Finland496851000001027 France40229587000001459 Germany61900820000001325 Greece1172810500000895 Iceland322275000854 Ireland153136000002351 Italy48100570000001185 Luxemburg2694180001554 Netherlands7162157000002192 Norway415344000001059 Portugal4200100000002381 SerbiaandMontenegro438174794371707 Spain15723395000002512 Sweden865088500001023 Switzerland465070000001505 Turkey20000650000003250UK251705800000023 04 Total22795644571230002005 JournalOfMinimumInterventionInDentistryJ MinimIntervDent2009.
3 2(1) ,slowsetting, (moreorless) ,unlikecomposites, ,heavilyfilled,reducedparticlesizeglass- ionomercementsisinnon-stressbearingbuild -ups,rootcaries, , , ,thebondisreliableandfarmoredegeneration resistantthantheresinsystems, ,astheyadheredirectlyto,evenhumid,dental hardtissues7,8(Figure1). [MPa] , glass -ionomercementmimicstoothcolournot asgoodascompositesdoandshowfastersurface lossbywear, ,insomecountries( ,UK)fullglass-ionomerClassIIIrestoration saregenerallyaccepted, ,introducedtoobtaincommandsetglass-ionom ercements, [MPa]tocontaminatedsubstratesJournalOfMi nimumInterventionInDentistryJMinimInterv Dent2009;2(1) , , , , , (Table3).Fordirectrestorativedentistry, , , ;2(1) (a)andultra-sonically(b) (a)andultra-sonically(b) ;2(1)-9-suchascuringshrinkagerelieveandc ontinuingchemistrythroughoutthebulkmater ial, ,yetnotfullycustomarytechnique,bywhichth ecements , ,whichcausesthesealanttoerodealreadyafte rsomemonths,itspreventiveeffectwasreport edstilleffectiveafter5years12, ,(1989),CamposSerraandCury(1992)andGlass poole(2001)explainedthisresultbyeffectiv efluoridereleasedfromtheglass- ionomer , ,obtainedbyreplicatechniquesfromthefissu resshowedclinicallyimperceptible,retaine dmaterial(Figure5).
4 Thepresenceofthismaterialmayberesponsibl efortheprolongedpreventionefficacy14, , (1993)suggestedthatunderoralconditions,g lass-ionomersealantsmightgraduallychange intoanew, , glass -ionomersmighttransformintoanename l-likestructurecalled pseudoenamel .Inadditiontothesatisfactionwithglass-io nomerasaneffectivewayofpreventingfissure caries,VanDuinenetal.(2004) , (re-)mineralizingpowerontoothstructures2 1, ,erosion-resistant, ,thereisnothingagainsttheuseofthe,basica llyinactive, ,applicationofresinsrequiresextensivetoo thsurfaceconditioning, , reandMj r(1990)thatteethsealedwithresinsmorefreq uentlydevelopcariesthanteethsealedwithgl ass- ionomer ,inspiteofthefactthatthebulkg lass-ionomersealanthadvisuallyvanishedwi thinafewmonths,wereexplainedbySEM-imagin g,whichrevealedstillretained glass - ionomer inthedepthofthefissureatsites, ;2(1) ;2(1)-11-Theseremnantsmaybethesameasthe intermediate layeraspostulatedbyWilsonetal.
5 (1983)22, ,difficultlyaccessibleinorganiclayershou ldpossessahighacid-resistance, (2004)demonstratedthatglass-ionomeradjac enttotoothstructureandincontactwiththeor alfluids, performance, ,withtime,theexchangeprocesscontinuesand consequentlytheglass-ionomerrestorationg ainsinquality, , glass -ionomerperformsclinicallybetterth anfromlaboratoryresearchmaybeexpected18, , (2001) (1993) ,27, , , glass -ionomerperformsclinicallybetterth anfromlaboratoryresearchmaybeexpected18, , (2001) (1993) , , ,thegreatergetsthefluoriderelease, , ;2(1)-12-onlybioactive, , , , ;14:3-9 ResumenElpresenteart culodescribelaspropiedades,avancesydefic ienciasdeloscementosion merov ndelion merov treoalaestructuradentalesmenossusceptibl ealast cnicasqueloscompuestosderesinas, ,losion merov treospuedenresultarserunmaterialrestaura dorm sseguroenlaodontolog adeinvasi nm nimabasadaent ;14 , :DentalCaries, ; , :HealthCounciloftheNetherlands,1998; :BlackwellMunksgaard, ,VanMeerbeekB,YoshidaY,InoueS,VargasM,La mbrechtsP, ;82 derholm, (eds), :Quintessence2003 ,TayFR,HashimotoM,BreschiL,CarvalhoRM, ;83 :Past, ;19 ;27 ;2(1) ,vanDuinenRNB,WernerA, ;75 ,vanDuinenRNB, ;20 , ;161 reI,Mj ;98 ,GaoW, ;21 ,ChristoffersenJ,RubenJ, ;23 , ;23 ,EricksonRL, ;14 , ;40 ,TosakiS,HirotaK, ;17 : glass -ionomerdentalcement, , (eds), , ,Tokyo, ,KleverlaanCJ,deGeeAJ,WernerA, fast-set ;21 ,DonlyKJ, ;10 ,PossnerHJ, ;62 ,DavidsonCL,deGeeAJ,FeilzerAJ, ;17; ,Garc ;15 ,GrattonDR,McCutcheonE,PlotzkeOB(1987).
6 ;18 , ;9 ;2(1) ;27 L,SalmenkiviS, ;9 ,Sepp ; ;2(1)-15.
