Optical properties of bisacryl‐, composite‐, ceramic‐ resin restorative materials: An aging simulation study

Abstract

Objective Compare optical properties of a bisacryl‐, composite‐, and ceramic‐resin restorative materials pre and post artificial aging. Methods Bisacryl‐resin (LuxaCrown [LC], DMG), resin‐composite (Filtek Supreme Ultra, [Filtek SU] 3M ESPE), and ceramic‐resin (Enamic, VITA Zahnfabrik) specimens were prepared. The L*, C*ab, and hab values were measured pre and post artificial aging to determine color stability (CIEDE2000) and changes in contrast ratio (CR), transmittance block, and relative translucency parameter. The datasets were analyzed using 2‐way ANOVA followed by pairwise comparisons. Results Color difference data showed a significant interaction between materials and treatments [F(6:60) = 375.04, P < .0001] with Enamic being most color stable material and coffee having most effect on color stability. CR data showed a significant interaction between materials and treatments [F(6:60) = 4.12, P = .0016]. LC showing most change in CR values with coffee treatment. Change in transmittance blocked by Filtek SU and LC was greater for coffee treatment than that by each of the other treatments (P < .0001). Filtek SU and LC, coffee produced a greater decrease in relative translucency than that each of the other treatments (P < .0001). Conclusions Resin‐based materials demonstrate optical properties that encourage their use for direct/indirect restorative options. Color stability and translucency of these materials are proportionally related. Clinical significance Understanding the optical properties of resin‐based materials provides help in material selection and provides insight into clinical performance and esthetic longevity. The optical stability of certain bisacryl‐resin is better than what was previously determined for these restorative materials.

Effect of Printing Layer Thickness on Optical Properties and Surface Roughness of 3D-Printed Resins: An In Vitro Study

“…The 2M2 or A2 shade is commonly used by researchers when studying the optical properties of different restorative materials and was used in this study for the standardization of measurements and potential comparability with previous study findings. 18 The spectral behaviors of S and K were similar to those of the 2M2 shade tab when 25-and 50-μm printing layer thicknesses were used for all tested materials. However, at 100-μm printing layer thicknesses, the S and K values of all tested materials differed from the 2M2 shade.…”

“…15,16,19,30 A number of factors influence the color stability of composite resins, including the degree of conversion, filler size, the amount of crosslinking, and water sorption. 18,39 Aging may result in matrix softening, deterioration, and increased discoloration. 39 Although there are many staining simulation approaches in the literature, thermocycling in staining beverages was devised to represent a more realistic clinical scenario.…”

“…15 With increased esthetic demands, a restorative material's optical properties and stability are critical for its success and longevity, regardless of the manufacturing process. 2,[16][17][18][19][20][21][22] However, the production process may influence a material's optical properties due to variations in material composition, the degree of polymerization, and surface roughness, which may also affect a restorative material's stainability, plaque accumulation, and wear potential in the long term. Accordingly, surface roughness may lead to caries formation and gingival diseases.…”

“…Accordingly, surface roughness may lead to caries formation and gingival diseases. 15,[18][19][20][21][22][23] Kubelka Munk's (K-M) theory is a model explaining the reflectance caused by two-flux radiation transfer in a uniform, homogeneous material situated over an opaque background. 24,25 The success of this mathematical model comes from the ability to easily define the absorption and scattering coefficients (K and S, respectively) from the reflectance and transmittance of the specimen.…”

Color and translucency stability of CAD/CAM restorative materials

“…Studies have evaluated the color and/or translucency stability of PICN after days of immersion in staining beverages (e.g., coffee, tea, red wine, cola, or juice) and compared it with other restorative materials 9,[13][14][15][16] . These studies applied diverse staining protocols and methods for calculating the optical properties, such as CIELAB 9,14 , CIEDE2000 13,15,16 , translucency parameter 13,14 , percentage of light transmission 9 , or contrast ratio 13,16 . In addition, most of the studies perform silicon carbide paper polishing for all materials.…”