Adhesion of Flowable Resin Composites in Simulated Wedge-Shaped Cervical Lesions: An In Vitro Pilot Study

Abstract

The resin composite restoration of non-carious cervical lesions (NCCLs) still faces some drawbacks mostly related to the quality of the marginal seal. This study attempts to evaluate the adhesive capacities of two flowable and two conventional hybrid resin composite restorations of NCCLs having two types of cervical margins. Our null hypothesis assumes the same adhesive behavior of different materials. The relative composition of dental–restoration structures was also measured. Thus, restored wedge-shaped cervical cavities were realized on both the buccal and oral surfaces of extracted teeth. After immersion in dye solution, sectioning of the teeth was performed. We proposed an optical microscopy method to quantify the dye penetration along the restoration–tooth interface and scanning electron microscopy (SEM) and energy-dispersive X-ray analysis (EDX) to evaluate the quality of the peripheral seal. The data obtained revealed an amount of dentinal microleakage for all tested materials, despite the favorable results of the restoration peripheral seal. Therefore, data from this study failed to reject the null hypothesis. The adhesion is not influenced by the position of cervical margins. The SEM revealed occasional disruptions of the adhesive interface. EDX sustains the qualitative compositions as provided by the manufacturers. Conclusions: The four experimental composites are recommended to restore NCCLs in clinic.

The Stresses and Deformations in the Abfraction Lesions of the Lower Premolars Studied by the Finite Element Analyses: Case Report and Review of Literature

“…Resin composite restoration of lesions augments the structural integrity and the biomechanics of roundabout NCCLs close to the healthy teeth. 4 Jakupović S. et al [27] 2016…”

“…The complex formed by periodontal tissues (cementum, ligaments, and bone) confers the characteristic flexibility of the tooth root in the alveolar socket, flexibility necessary for dispersing the occlusal forces [1][2][3]. Irreversible structural defects that are located in the cervical area at the level of the enamel-cement junction on the buccal/labial surface of the teeth are named non-carious cervical lesions (NCCLs) [4]. In the area of the enamelcementum junction, the enamel prisms have a horizontal orientation [5].…”

Evaluation of dental pulp stem cells response to flowable nano-hybrid dental composites: A comparative analysis

“…The inorganic fillers are usually made of glass, quartz, or ceramic materials. The filler particles reinforce the composite, improve its mechanical properties, and determine its shade and translucency [ 2 , 7 ]. Recent advancements in FRC resulted in the introduction of improved formulations with higher filler content.…”

Evaluation of Abfraction Lesions Restored with Three Dental Materials: A Comparative Study

“…Non-carious cervical lesions (NCCLs) are represented by irreversible damage to the dental hard tissues (enamel, dentin, and cement) at the level of the cement-enamel junction (CEJ) [1,2]. The CEJ is stable over time [3] and presents four types of relationships: the dental cement overlaps the enamel; "edge-to-edge" junction; exposed dentin due to the existence of a gap between the enamel and cement; enamel covers the cement [4].…”