Orientador: Lafayette Nogueira Junior / Banca: Carlos Augusto Pavanelli / Banca: Paulo Sérgio Mutarelli / Resumo: O objetivo deste estudo foi avaliar e comparar a adaptação marginal de restaurações, confeccionadas em dois tipos de sistemas cerâmicos: CEREC inLab (VITA) e IPS Empress 2 (Ivoclar-Vivadent), após a cimentação com cimento resinoso RelyX (3M). Foram preparados 20 pré-molares humanos com cavidade MOD inlay, reproduzidos com silicone de adição, e obtidos modelos em gesso tipo IV, sobre os quais foram confeccionadas as restaurações conforme as recomendações dos fabricantes. Dez inlays no sistema IPS Empress 2 e 10 inlays no sistema CEREC inLab. As restaurações foram cimentadas sob pressão constante de 1,5 Kgf por 10 min, com cimento resinoso, com pré-tratamento. As desadaptações marginais foram avaliadas em MEV, com magnificação de 200x, em 50 pontos eqüidistantes. As médias foram analisadas pelo teste estatístico t(Student) de amostras dependentes.Resultando em uma diferenca estatisticamente significante entre as desadaptaçoes marginais no sistema IPS Empress (93,8'mais ou menos'15,5'mü'm)que se mostraram menores que no sistema CEREC inLab (114,4'mais ou menos'10,6'mü'm). Quando se comparou os valores médios entre as faces proximais (116,51.21,85'mü') e oclusal (112,26'mais ou menos'8,49'mü") do sistema Cerec Inlab, e faces proximais (87,12'mais ou menos'27,98,'mü') e oclusal (100,47'mais ou menos'22,23'mü')do sistema IPS Empress 2, verifica-se que esses valores não diferem estatisticamente. Ainda assim, conclui-se que as médias obtidas são aceitavéis clinicamente. / Abstract: This study has the proposal to evaluate the marginal adaptation of two system all-ceramic class II inlays one of laboratory-made heat-pressed ceramics (IPS Empress 2) and other computer-aided manufacturing ( CEREC inLab) after cementation with resin cement . Extracted human premolars were prepared to receive mesio occluso distal (MOD) ceramic inlays for 10 IPS Empress restorations and 10 CEREC inLab restorations. The impression material used was a polivinilsyloxane addition silicone by the double impression technique. The impressions of prepared teeth were cast in type IV dental stone. The restaurations were made following the manufacturer's recommendations. The inlays were luted on human premolars with resin cement in accordance with the manufacturer's recommended pré-treatment. The marginal gaps were investigated scanning electron microscopy with magnification of 200x. The results were analyzed by t (student) statistic test.The means marginal gap for IPS Empress 2 wal 93,8'mais ou menos'15,5'mü'm significantly smaller than that od 114,4'mais ou menos'10,6'mü'm calculated a the CEREC in Lab system.The gaps of the inlays at the occlusal margin and of the approximal margin showed no significantly differences in two system. It may be concluded that mensuarement value are clinically acceptable. / Mestre

Die adhäsive Befestigung von keramischen Inlays erfordert viele mühsa-me und zeitintensive Arbeitsschritte. Zudem werden die Dentin-Bonding-Materialien nicht nach den Herstellerangaben verarbeitet, was unter Um-ständen einen negativen Einfluss auf die Randqualität von keramischen Inlays deren Ränder sich im Dentin befinden können, haben kann. Ziel der Untersuchung: In dieser Studie wurde der Einfluss einer verein-fachten Applikationstechnik auf die Randqualität keramischer Inlays un-tersucht. Material und Methode: MOD-Inlaykavitäten mit Präparationsgrenze im Dentin wurden in 32 humane kariesfreie Prämolaren präpariert. Die Prä-molaren wurden zufällig in vier Gruppen geteilt (n=8). In dem Ver-suchsaufbau war ein Untersuchungsparameter das Inlaymaterial (Empress/Cerec) und der andere die Polymerisation des Dentin-Bonding-Materials vor Insertion des Inlays (P+) und nach Insertion des Inlays (P). Alle Inlays wurden mit einem Dualzement (Variolink II) in Kombination mit einem schmelz- und dentinkonditionierenden Universal-Bonding-Material (Etch & Prime 3.0) eingegliedert. Drei Parameter wurden verwandt, um die Qualität der Versorgung zu bestimmen: 1. Die Passung, gemessen durch die Differenz der Einsenktiefe in die Kavität zwischen der Anprobe und nach dem Zementieren, 2. die Randqualität, die mittels quantitativer Randanalyse im SEM bei einer 200fachen Vergrößerung vor und nach Temperaturlastwechsel (2000 mal zwischen 5° und 55° C) durch Replikas aus Epoxydharz bestimmt wurde und 3. die Randdichtheit, überprüft mit einem Farbstoffpenetrationstest (0,5% wässrige Lösung von basischem Fuchsin). Ergebnisse: Die statistische Analyse (ANOVA) ergab: In allen vier Gruppen waren die Inlays nach der Eingliederung > 5µm tiefer in der Kavität, als bei der Anprobe. Das Ergebnis war für die Gruppe Cerec-Inlays bei denen das Dentin-Bonding vor dem Eingliedern nicht polymerisiert wurde signifikant größer. Die statistische Auswertung der Randanalyse nach dem Friedman und Wilcoxon Test ergab für die zervikalen Bereiche für beide getesteten Kriterien keine statistisch signifikanten Unterschiede (p< 0,01). Die Median-werte für alle Gruppen zeigten 100 Prozent klinisch akzeptable Ränder und keine Randspalten. Der Farbstoffpenetrationstest ergab 71 Prozent dichte Ränder im Schmelz und 38 Prozent dichte Ränder im Dentin. Schlussfolgerung: Bei der Verwendung des universal Bonding-Materials ist es möglich, hohe Randqualitäten mit keramischen Inlays im Schmelz und Dentin selbst mit einer vereinfachten Applikationstechnik, zu erzielen. / The adhesive luting technique for ceramic inlays requires a sequence of multiple steps that are cumbersome and time consuming. Furthermore, modifications of dentin bonding procedures may negatively influence the margin quality of ce-ramic inlays with cervical dentin finishing lines. Purpose: The objective of this study was to test the effect of a new, sim-plified procedure for dentin bonding on the margin quality of ceramic inlays. Materials and Methods: Thirty-two MOD inlay cavities with cervical finish-ing lines in dentin were prepared into premolars. They were randomly di-vided into four groups (n = 8): In the balanced design, one parameter was the inlay material (Empress/Cerec) and the other the polymerization of the dentin bonding agent, before insertion of the inlay (P+) and after in-sertion of the inlay (P-). All inlays were inserted with dual cured cement (Variolink II) in combination with an enamel and dentin conditioning uni-versal bonding agent (Etch & Prime 3.0). Three parameters were used to determine the inlay margin quality: (1) the fit, measured by the difference of the insertion depth into the cavity between try-in and cementation, (2) a quantitative margin analysis in the SEM at a magnification of 200xs, be-fore and after thermocycling (2000 times between 5 and 55 degrees cen-tigrade), using epoxy replicas and (3) dye penetration. Results: Statistical analysis using the ANOVA test showed in all four groups the inlays were >5 µm deeper in the cavities than at the try-in ses-sion. This is explained by the substance loss from the etching. The measured difference for Cerec inlays inserted in cavities, where the bond-ing agent was not polymerized prior to insertion, was significantly larger. Statistical interpretation of the margin analysis of the cervical segment using the Friedman and Wilcoxon Test revealed no statistical differences (p< 0.01) for both criteria tested. The median values for all groups were 100% for clinical acceptable margin and 0% for marginal opening. The dye penetration test resulted in 71% of the enamel margins and 38% of the dentin margins. Conclusion: By using the universal bonding agent, high margin qualities on dentin and enamel are obtained with ceramic inlays even with the sim-plified approach.

Made available in DSpace on 2014-06-11T19:28:58Z (GMT). No. of bitstreams: 0 Previous issue date: 2007-06-19Bitstream added on 2014-06-13T20:58:53Z : No. of bitstreams: 1 carvalho_cf_me_sjc.pdf: 1809025 bytes, checksum: bd4ee4f9a60dfdd8304d67de208703e4 (MD5) / O objetivo deste estudo foi avaliar e comparar a adaptação marginal de restaurações, confeccionadas em dois tipos de sistemas cerâmicos: CEREC inLab (VITA) e IPS Empress 2 (Ivoclar-Vivadent) , após a cimentação com cimento resinoso RelyX (3M). Foram preparados 20 pré-molares humanos com cavidade MOD inlay, reproduzidos com silicone de adição, e obtidos modelos em gesso tipo IV, sobre os quais foram confeccionadas as restaurações conforme as recomendações dos fabricantes. Dez inlays no sistema IPS Empress 2 e 10 inlays no sistema CEREC inLab. As restaurações foram cimentadas sob pressão constante de 1,5 Kgf por 10 min, com cimento resinoso, com pré-tratamento. As desadaptações marginais foram avaliadas em MEV, com magnificação de 200x, em 50 pontos eqüidistantes. As médias foram analisadas pelo teste estatístico t(Student) de amostras dependentes.Resultando em uma diferenca estatisticamente significante entre as desadaptaçoes marginais no sistema IPS Empress (93,8'mais ou menos'15,5'mü'm)que se mostraram menores que no sistema CEREC inLab (114,4'mais ou menos'10,6'mü'm). Quando se comparou os valores médios entre as faces proximais (116,51.21,85'mü') e oclusal (112,26'mais ou menos'8,49'mü) do sistema Cerec Inlab, e faces proximais (87,12'mais ou menos'27,98,'mü') e oclusal (100,47'mais ou menos'22,23'mü')do sistema IPS Empress 2, verifica-se que esses valores não diferem estatisticamente. Ainda assim, conclui-se que as médias obtidas são aceitavéis clinicamente. / This study has the proposal to evaluate the marginal adaptation of two system all-ceramic class II inlays one of laboratory-made heat-pressed ceramics (IPS Empress 2) and other computer-aided manufacturing ( CEREC inLab) after cementation with resin cement . Extracted human premolars were prepared to receive mesio occluso distal (MOD) ceramic inlays for 10 IPS Empress restorations and 10 CEREC inLab restorations. The impression material used was a polivinilsyloxane addition silicone by the double impression technique. The impressions of prepared teeth were cast in type IV dental stone. The restaurations were made following the manufacturer's recommendations. The inlays were luted on human premolars with resin cement in accordance with the manufacturer's recommended pré-treatment. The marginal gaps were investigated scanning electron microscopy with magnification of 200x. The results were analyzed by t (student) statistic test.The means marginal gap for IPS Empress 2 wal 93,8'mais ou menos'15,5'mü'm significantly smaller than that od 114,4'mais ou menos'10,6'mü'm calculated a the CEREC in Lab system.The gaps of the inlays at the occlusal margin and of the approximal margin showed no significantly differences in two system. It may be concluded that mensuarement value are clinically acceptable.