Effect of Various Ph Media on Some Optical Properties and Surface Roughness of Bilayered Reinforced Polymer and Monolithic Hybrid Ceramic (An In-Vitro Study).

Abstract

Objective: The objective of this study was to evaluate the effect of different pH media on color stability, translucency and surface roughness on Hybrid ceramic material (Vita Enamic) and bilayered reinforced polymer (PEEK). Materials and methods: A total of 60 discs, 30 in each group that were designed with milled with CAD/CAM, each group was further subdivided into 3 subgroups (10 samples in each group) according to the immersing solution.(neutral, weak acid and strong acid), all samples were aged in the immersion solutions for 24 days in an incubator at 37 o which simulate 2 years of clinical service. Optical profilometer was used to assess surface roughness, a spectrophotometer was used to assess color change and translucency was calculated with the tranclucency parameter equation. Results: The results showed that no statistical significant difference in surface roughness, color stability and translucency with Vita Enamic in different solutions, and statistical significant difference with PEEK group in different solutions. Conclusion: Vita Enamic has higher color stability and translucency than PEEK and can maintain smoother surface with different pH media.

Evaluation of colour stability and surface roughness of three CAD/CAM materials (IPS e.max, Vita Enamic, and PEEK) after immersion in two beverage solutions: An in vitro study

“…The slight increase in surface roughness of IPS e.max CAD and Vita Enamic after immersion in Coca-Cola and coffee could be also attributed to the effect of acid in degrading the ceramic matrix and exposing rough surfaces [41] . This was in agreement with (Branco et al; Hussein et al) [42,33] who stated that the increase in surface roughness of ceramics was due to the dissolution of the ceramic material by the effect of acids.…”

“…The high Color change of PEEK (BioHPP) might also be due to the water absorption nature of the veneering composite material, as it is composed of BISGMA and TEGDMA, which shows high hydrophilicity [32] . This was in agreement with Hussein et al [33] and Badran et al [34] who proved the stainability of PEEK (BioHPP) layered with the crea.lign composite and they related their findings to the composite hydrophilicity. However, PEEK exhibited lower colour difference values than Vita Enamic in this study.…”

Effect of Acidic Media on Surface Topography and Color Stability of Two Different Glass Ceramics

“…24 The release of silicone ions and other ions such as potassium and sodium from the surface of the ceramic can cause porosities in the glass matrix. 26 In this study, SEM photomicrographs and Ra values confirm these mechanisms. The EDX measurements showed an increase in the silicate weight% for both materials and decrease in the calcium and phosphorous wt%; these findings may be attributed to a higher rate of dissolution of the glassy phase than the dispersed lithium disilicate crystals.…”

Piezoelectric Repeated Scaling Effect on Marginal Leakage of Two Different Cemented Ceramic Crowns

“…Church TD.et.al, 2017 (15) and Sen N.et.al, 2020 (16) both declare that hightranslucency monolithic zirconia has outstanding aesthetics, great strength qualities, and good biocompatibility. As it possesses ideal flexibility, stress resistance, and light conductivity, hybrid ceramics enable combining the advantageous qualities of ceramics and composites, providing greater visual adaptability (17,18) . Furthermore, they are less abrasive on the opposing dentition.…”