An In-Vitro Evaluation of Microleakage in Resin-Based Restorative Materials at Different Time Intervals

Abstract

A vital feature of conservative dentistry is the adhesion of the restorative material to the tooth structure for restoration of the tooth substance lost due to dental decay, trauma, or dental imperfections. In a perfect world, a restorative material should generate a lasting adhesion by bonding the restoration with tooth tissues. The ingress of micro-organisms, oral fluids, molecules, and ions through microscopic spaces due to faulty adhesion between restoration and tooth structure is known as microleakage. This study is focuses on the evaluation of adhesive failures between the restorative materials. In the past, studies have focused more on the bonding potential of a restorative material with the tooth surface. Therefore, there is need to carry out a study that compares the microleakage between resin-based restorative materials in a sandwich manner with and without the intermediate bonding layer after immersion in 2% methylene blue dye at different time intervals. The restorative materials used were composite Ceram X Mono plus (DENTSPLY) and Z350 (3M ESPE), Vitremer resin modified glass ionomer cement (RMGIC) (3M ESPE), smart dentine replacement SDR (3M ESPE), Bond NT (DENTSPLY), and Universal Bond (3M ESPE). A light emitting diode (LED) was used to cure the specimens. Artificial saliva was used as a storage medium for the specimens. Thermocycling of specimens was carried out at 500 cycles/30 s and 1000 cycles/30 s. The world health organization (WHO) grading tool for microleakage was used to analyze fluid ingress in the specimens through disclosing by 2% methylene blue dye. The statistical analysis was carried out with one-way analysis of variance (ANOVA) and Tukey post hoc test, keeping the level of significance at p ≤ 0.05. In Grade 0 = 85 samples, Grade 1 = 10 samples, Grade 2 = 7 samples, Grade 3 = 16 samples, and in Grade 4 = 2 samples were identified. This study describes that no microleakage was observed in SDR and resin composite groups as compared to Vitremer and resin composite groups.

Evaluating flexure properties, hardness, roughness and microleakage of high-strength injectable dental composite: an in vitro study

“…The use of resin-based materials is gaining popularity in dental practice due to ease of application, excellent esthetic outcomes, adequate mechanical properties, and adaptability [7,18]. However, there are still a room for further modification of RBC due to some inherent drawbacks in these materials such as technique sensitivity, polymerization shrinkage which can lead to gap formation and microleakage, time needed for incremental application, low wear and abrasion resistance and marginal deterioration [7,19].…”

Aesthetic impact of resin infiltration and its mechanical effect on ceramic bonding for white spot lesions

“…We also investigated the success and failure of ceramic restoration by examining microleakage at the enamelceramic interface post-thermocycling utilizing the dye penetration method with 2% methylene blue dye [83]. Previous studies have suggested that methylene blue penetrates the deepest layer in WSLs (the inner half of enamel or outer half of dentin), secondarily through sound enamel (the outer half of the enamel), and penetrates the most shallow layer in infiltrant-treated WLSs (no penetration or the inner half of enamel) [84].…”

Comparación del grado de microfiltración en tres sistemas restauradores utilizando adhesivos universales: estudio in vitro

“…Este fue elegido porque no se han reportado fallas en este método para evaluar la microfiltración. Además, este colorante tiene mejor penetración en comparación con otros tintes, ya que, dentro de sus características, destaca su facilidad de manejo, su solubilidad en el agua y su rápida difusión en las grietas originadas por la microfiltración (24). Los resultados del presente estudio indicaron que la menor microfiltración reportada se dio en el grupo de la marca Ivoclar®, empleando la resina Tetric-N-Ceram® y su adhesivo universal Tetric N-Bond Universal® para restauraciones clase V. A pesar de que en el estudio in vitro realizado se controlaron variables con respecto a la técnica, se deberían realizar estudios que soporten el uso de resinas compuestas similares a las utilizadas en este estudio según la aplicación del fabricante, a fin de validar la sobrevida de estas resinas compuestas.…”