Bruno-Mendonça-Lucena de Veras1, Renata-Pedrosa Guimarães2, Luiz-Carlos Alves3, Rafael-José-Ribeiro Padilha4, Luana-Osório Fernandes5, Carlos-Menezes Aguiar6. 1. PhD student - UFPE - Federal University of Pernambuco, Department of Prosthetic Dentistry and Maxillofacial Surgery, 1235 Professor Moraes Rego Ave, Recife, PE, 50670901, Brazil. 2. PhD, Associate teacher -UFPE - Federal University of Pernambuco, Department of Prosthetic Dentistry and Maxillofacial Surgery, 1235 Professor Moraes Rego Ave, Recife, PE, 50670901, Brazil. 3. PhD, Associate teacher - UFPE - Federal University of Pernambuco, Department of Electronic Microscopy of the Laboratory of Immunopathology keizo Asami - Lika, 1235 Professor Moraes Rego Ave, Recife, PE, 50670901, Brazil. 4. MSc, Associate microscopy technician) - UFPE - Federal University of Pernambuco, Department of Electronic Microscopy of the Laboratory of Immunopathology keizo Asami - Lika, 1235 Professor Moraes Rego Ave, Recife, PE, 50670901, Brazil. 5. PhD student - UFPE - Federal University of Pernambuco, Department of Prosthetic Dentistry and Maxillofacial Surgery, 1235 Professor Moraes Rego Ave, -Recife, PE, 50670901, Brazil. 6. PhD, Associate teacher - UFPE - Federal University of Pernambuco, Department of Prosthetic Dentistry and Maxillofacial Surgery, 1235 Professor Moraes Rego Ave, Recife, PE, 50670901, Brazil.
Abstract
BACKGROUND: This study compared the quality of marginal sealing in the gingival wall of class II preparations of two low-shirinkage resins of the bulk fill type with a conventional resin isolated or associated with a glass ionomer cement (GIC). MATERIAL AND METHODS: 40 human molars were divided into 4 groups and 80 occlusal-mesial and occlusal-distal restorations were performed with the following materials: SureFil SDR flow, Filtek Bulk Fill Posterior, Z250 resins and Riva Light Cure GIC. 40 restorations were evaluated in Scanning Electron Microscopy (SEM) with Elemental Microanalysis Spectrometry (EDS) initially and the remainder after a period of 6 months of aging in a 37 ± 5°C oven. An average of the silver penetration at each restoration was obtained in the two evaluations and the results were statistically analyzed in a descriptive and inferential way, through the paired t-Student and one-way ANOVA F-test. RESULTS: There were no significant statistical differences between the materials with respect to silver nanoinfiltration, except for the Bulk Fill Posterior/3M ESPE resin compared to the GIC and conventional resin in the final evaluation. CONCLUSIONS: The low shrinkage resins showed a similar behavior in relation to the marginal sealing quality observed in the GIC or composite resin with the incremental technique, also presenting the advantage of simplicity in the technique of confection of the restorations and reduction of the time of work. Key words:Resin composites, Bulk fill, dental restorations, marginal quality, adhesion. Copyright:
BACKGROUND: This study compared the quality of marginal sealing in the gingival wall of class II preparations of two low-shirinkage resins of the bulk fill type with a conventional resin isolated or associated with a glass ionomer cement (GIC). MATERIAL AND METHODS: 40 human molars were divided into 4 groups and 80 occlusal-mesial and occlusal-distal restorations were performed with the following materials: SureFil SDR flow, Filtek Bulk Fill Posterior, Z250 resins and Riva Light Cure GIC. 40 restorations were evaluated in Scanning Electron Microscopy (SEM) with Elemental Microanalysis Spectrometry (EDS) initially and the remainder after a period of 6 months of aging in a 37 ± 5°C oven. An average of the silver penetration at each restoration was obtained in the two evaluations and the results were statistically analyzed in a descriptive and inferential way, through the paired t-Student and one-way ANOVA F-test. RESULTS: There were no significant statistical differences between the materials with respect to silver nanoinfiltration, except for the Bulk Fill Posterior/3M ESPE resin compared to the GIC and conventional resin in the final evaluation. CONCLUSIONS: The low shrinkage resins showed a similar behavior in relation to the marginal sealing quality observed in the GIC or composite resin with the incremental technique, also presenting the advantage of simplicity in the technique of confection of the restorations and reduction of the time of work. Key words:Resin composites, Bulk fill, dental restorations, marginal quality, adhesion. Copyright:
Authors: Julian G Leprince; William M Palin; Julie Vanacker; Joseph Sabbagh; Jacques Devaux; Gaetane Leloup Journal: J Dent Date: 2014-05-27 Impact factor: 4.379