Abstract
The aim of this in vitro study is to evaluate the effect of different acidic media on volumetric wear and surface roughness of CAD/CAM monolithic materials. Forty-eight rectangular specimens were prepared using different CAD/CAM monolithic materials: nanohybrid composite (Grandio Blocks, Voco), resin-based composite (Cerasmart, GC), lithium disilicate (E-Max, Ivoclar), and high-translucency zirconia (Katana STML, Kuraray Noritake). After storage in distilled water at 37 °C for two days, the specimens were tested using a chewing machine with a stainless-steel ball as an antagonist (49N loads, 250,000 cycles). Testing was performed using distilled water, Coca-Cola, and Red Bull as abrasive media. Wear and surface roughness analyses of the CAD/CAM materials were performed using a 3D profilometer and analyzed with two-way analysis of variance and post hoc pairwise comparison procedures. Worn surfaces were examined using scanning electron microscopy. Resin-based materials suffered higher volumetric wear than ceramics (p = 0.00001). Water induced significantly less volumetric wear than the other tested solutions (p = 0.0014), independent of the material tested. High-translucency zirconia showed less surface roughness than all the other materials tested. The selection of monolithic CAD/CAM materials to restore worn dentition due to erosive processes could impact restorative therapy stability over time. Resin-based materials seem to be more influenced by the acidic environment when subjected to a two-body wear test.
Highlights
The continuous and constant development of digital technologies has led to the affirmation of restorative and prosthetic restorations obtained through computer-aided design and computer-aided manufacturing (CAD/CAM) processes
Tukey’s post hoc test showed that RBC and NC suffered greater volumetric wear than LD and ZR, showing a statistical significance between them
Two-way analysis of variance test (ANOVA) reported a significant influence of the factor “material” (p = 0.00001), while no significant differences were reported for the “acidic beverage” factor (p = 0.22), and their interactions (p = 0.14) were shown
Summary
The continuous and constant development of digital technologies has led to the affirmation of restorative and prosthetic restorations obtained through computer-aided design and computer-aided manufacturing (CAD/CAM) processes This development has led to the increasingly frequent use of monolithic materials produced from a single blank, either ceramic or resin-based, produced from a single block. As stated in the classification by Gracis et al [1], restorative materials can be grouped into three main families: glass matrix ceramics, polycrystalline ceramics, and resin matrix ceramics. All of these could be employed to restore partially to heavily compromised teeth after big carious lesions, fractures, or extensive wear. The more recently introduced resin-based ceramics and hybrid ceramics—thanks to their high inorganic content, high temperature, and pressure polymerization process—showed consistent chemical and mechanical properties [6,7,8], so they are considered a valid option for monolithic adhesive restorations
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
