Influence of restorative techniques on marginal adaptation and dye penetration around Class V restorations.
The aim of this study was to observe the influence of restorative techniques on marginal adaptation and dye penetration around Class V restorations simulating abfraction lesions. Sixty mandibular premolars were divided into six groups (n = 10) using different restorative materials. Cavity preparation presented the gingival wall localized in dentin and the incisal wall in enamel. Replicas of abfraction lesions were obtained and viewed under a stereomicroscope for adaptation assessment. All teeth were subjected to thermocycling and mechanical load cycling and immersed in 0.5% methylene blue dye (pH 7.2) for four hours. The results were tabulated and submitted to Kruskal-Wallis tests, which were significant for the dentin margin with lower microleakage values for primer/Vitremer, followed by Clearfil SE Bond/Durafill VS and Clearfil SE Bond/Z100 in qualitative and quantitative methods (P < 0.05). The enamel margin had no significant difference for microleakage values for all groups. There was no statistically significant difference among the substrates for marginal adaptation. The Spearman coefficient illustrated a direct relation between enamel and dentin for microleakage evaluation (P < 0.0001). The data demonstrated no difference for marginal fit by chi-square test. It can be concluded that all groups had microleakage in different degrees, with the lowest values for resin-modified glass ionomer.
Department of Dentistry II, Dental School, Federal University of Maranhao, Sao Luis, Maranhao, Brazil.
Adriana de Fatima Vasconcelos
Ade F
Pereira
Isis Andrea Venturini Pola
IA
Poiate
Edgar
E
Poiate
Flavia Pires
FP
Rodrigues
Mirian Lacalle
ML
Turbino
Walter Gomes
WG
Miranda
D001641:Bicuspid / Q000473:pathology; D004396:Coloring Agents; D003188:Composite Resins / Q000737:chemistry; D003737:Dental Cavity Preparation / Q000145:classification / Q000379:methods; D003738:Dental Cements / Q000737:chemistry; D003743:Dental Enamel / Q000473:pathology; D003763:Dental Leakage / Q000145:classification*; D018772:Dental Marginal Adaptation; D003764:Dental Materials / Q000737:chemistry*; D003793:Dental Restoration, Permanent / Q000145:classification / Q000379:methods*; D003804:Dentin / Q000473:pathology; D005899:Glass Ionomer Cements / Q000737:chemistry; D006801:Humans; D008751:Methylene Blue; D019279:Resin Cements / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry; D013696:Temperature; D013997:Time Factors; D057085:Tooth Wear / Q000628:therapy; D015040:Zirconium / Q000737:chemistry
C554641:Adper single bond 2; C438313:Clearfil SE Bond; D004396:Coloring Agents; D003188:Composite Resins; D003738:Dental Cements; D003764:Dental Materials; D005899:Glass Ionomer Cements; C515713:Ketac Molar Easymix; D019279:Resin Cements; C084550:Vitremer; C083568:Z100 composite resin; C110712:ketac-molar; D012822:Silicon Dioxide; C039734:Durafill; D015040:Zirconium; D008751:Methylene Blue