Aesthetic dentistry is in high demand today due to the various prosthetic options that enhance patients’ smile design and self-esteem, consequently. The aim of our in vitro studies was to assess the effect of our patented, crenelated veneers design compared to conventional ones on their marginal and internal gap to the prepared tooth surface [Măroiu, A.C., Sinescu, C., Duma, et al., Medicina 57, 772 (2021)]. Twenty-four lithium disilicate ceramic veneers were obtained using CAD/CAM technology. The samples were divided into two groups: twelve veneers with a linear marginal contour - conventional (CO), and twelve veneers with the novel sinusoidal marginal design - crenelated (CR). All veneers were subsequetly luted to the dental surface by using a specific dental cement. The marginal gaps along the adhesive interfaces were analyzed using optical microscopy. Micro-Computed Tomography (CT) was used to investigate both the internal fit of the veneers and the homogeneity of the luting cement. Significant differences between CO and CR veneers were determined by using STATA and one-way ANOVA tests: (i) the marginal gap was larger for CO than for CR veneers; (ii) the internal adaptation was better for CR veneers; (iii) the porosity mean within the cement was not significantly different for CO and CR veneers, with a smaller standard deviation for the CR group. The internal gaps were modelled using the micro-CT results. Characteristic functions were obtained to compare volumes of luting cement for these two veneers. The novel veneers’ design triggered better marginal and internal fit of the restorations to the prepared dental surface.
Dental indirect veneers have become the most functional and cost-effective method for providing high-aesthetic results
whenever smile design enhancement is required. Yet, clinical failures have been reported due to the detachment of the
veneers from the dental hard tissues, as well as to chipping and microleakage. Many experimental studies have been
conducted in order to identify clinical and technical solutions for enhancing the adhesive and biomechanical properties of
the veneers, by promoting the same classical, linear marginal contour of these particular indirect restorations. Thus, the
aim of this study is to develop a novel design of the veneers deemed to augment the interfacial adhesive forces and,
furthermore, to investigate the bonded interfaces by using optical coherence tomography.
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