Objectives: To evaluate the marginal integrity of class V restorations through an SEM observation and a microleakage test. Methods: Teeth with class V cavities were restored with either a flowable composite (n = 20) or a glass ionomer cement (GIC) (n = 20). Ten restorations in each group were immediately polished. A coating agent was applied on five polished and five non-polished restorations of each group. No coating was used on the remaining specimens. Epoxy resin replicas of the restorations were observed under a SEM and the percentage of marginal gaps was calculated. After immersion in a 2% methylene blue solution, three sections were obtained from each specimen and observed under a stereomicroscope. occlusal and gingival microleakage were evaluated with a four-steps scoring system. The percentages of marginal gaps and the microleakage scores were analyzed with the Kruskal-Wallis ANOVA and the Mann-Whitney test with Bonferroni's correction. Occlusal and gingival microleakage were compared with the Wilcoxon test. Results: No gaps were detected after coating. The restorative materials did not differ in interfacial gaps. Immediate polishing increased the gaps of uncoated restorations (p < 0.05). The microleakage decreased with coating, except for occlusal wall of polished flowable composite restorations. After coating, the occlusal microleakage was higher than the gingival (p < 0.05), except for non-polished flowable composite restorations. After polishing and coating, the flowable composite showed higher occlusal microleakage than the GIC. The polishing increased the occlusal microleakage of coated flowable composite restorations. Conclusions: The coating procedure is advisable for restoring marginal integrity and reducing gingival microleakage in class V restorations. (C) 2008 Elsevier Ltd. All rights reserved.

SEM and microleakage evaluation of the marginal integrity of two types of class V restorations with or without the use of a light-curable coating material and of polishing / Elisa, Magni; Ling, Zhang; Reinhard, Hickel; Bossu', Maurizio; Polimeni, Antonella; Marco, Ferrari. - In: JOURNAL OF DENTISTRY. - ISSN 0300-5712. - STAMPA. - 36:11(2008), pp. 885-891. [10.1016/j.jdent.2008.07.003]

SEM and microleakage evaluation of the marginal integrity of two types of class V restorations with or without the use of a light-curable coating material and of polishing

BOSSU', MAURIZIO;POLIMENI, Antonella;
2008

Abstract

Objectives: To evaluate the marginal integrity of class V restorations through an SEM observation and a microleakage test. Methods: Teeth with class V cavities were restored with either a flowable composite (n = 20) or a glass ionomer cement (GIC) (n = 20). Ten restorations in each group were immediately polished. A coating agent was applied on five polished and five non-polished restorations of each group. No coating was used on the remaining specimens. Epoxy resin replicas of the restorations were observed under a SEM and the percentage of marginal gaps was calculated. After immersion in a 2% methylene blue solution, three sections were obtained from each specimen and observed under a stereomicroscope. occlusal and gingival microleakage were evaluated with a four-steps scoring system. The percentages of marginal gaps and the microleakage scores were analyzed with the Kruskal-Wallis ANOVA and the Mann-Whitney test with Bonferroni's correction. Occlusal and gingival microleakage were compared with the Wilcoxon test. Results: No gaps were detected after coating. The restorative materials did not differ in interfacial gaps. Immediate polishing increased the gaps of uncoated restorations (p < 0.05). The microleakage decreased with coating, except for occlusal wall of polished flowable composite restorations. After coating, the occlusal microleakage was higher than the gingival (p < 0.05), except for non-polished flowable composite restorations. After polishing and coating, the flowable composite showed higher occlusal microleakage than the GIC. The polishing increased the occlusal microleakage of coated flowable composite restorations. Conclusions: The coating procedure is advisable for restoring marginal integrity and reducing gingival microleakage in class V restorations. (C) 2008 Elsevier Ltd. All rights reserved.
2008
class v restorations; coating material; composite resins; dental restoration; light-curing of dental adhesives; marginal integrity; microleakage; sem
01 Pubblicazione su rivista::01a Articolo in rivista
SEM and microleakage evaluation of the marginal integrity of two types of class V restorations with or without the use of a light-curable coating material and of polishing / Elisa, Magni; Ling, Zhang; Reinhard, Hickel; Bossu', Maurizio; Polimeni, Antonella; Marco, Ferrari. - In: JOURNAL OF DENTISTRY. - ISSN 0300-5712. - STAMPA. - 36:11(2008), pp. 885-891. [10.1016/j.jdent.2008.07.003]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/226962
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