Translucency changes of direct esthetic restorative materials after curing, aging and treatment

Abstract

The purpose of this article was to review the changes in translucency of direct esthetic restorative materials after curing, aging and treatment. As a criterion for the evaluation of clinical translucency changes, visual perceptibility threshold in translucency parameter difference (ΔTP) of 2 was used. Translucency changes after curing were perceivable depending on experimental methods and products (largest ΔTP in resin composites = 15.9). Translucency changes after aging were reported as either relatively stable or showed perceivable changes by aging protocols (largest ΔTP in resin composites = -3.8). Translucency changes after curing, aging and treatment were perceivable in several products and experimental methods. Therefore, shade matching of direct esthetic materials should be performed considering these instabilities of translucency in direct esthetic materials.

Translucency of Zirconia Ceramics before and after Artificial Aging

“…A number of studies have described changes in optical properties of dental materials before and after aging . Few studies could be found with respect to translucency changes in zirconia ceramics after artificial aging …”

“…A number of studies have described changes in optical properties of dental materials before and after aging. [11][12][13][14][15][16][17] Few studies could be found with respect to translucency changes in zirconia ceramics after artificial aging. [18][19][20] The results of this study support the findings of Fathy et al 18 and Alghazzawi,19 where the Y-TZP translucency of colored specimens decreased significantly after artificial aging.…”

“…12,15,16 On the other hand, other studies showed an influence of aging on the translucency and perceivable changes of TP ( TP > 2) for composites. 16,17 Regarding different zirconia ceramics, studies show that translucency and color are affected by aging. [18][19][20] It has been reported that the optical material properties are affected by their structure.…”

“…In some composites the translucency is described as stable regardless of aging . On the other hand, other studies showed an influence of aging on the translucency and perceivable changes of TP (ΔTP > 2) for composites . Regarding different zirconia ceramics, studies show that translucency and color are affected by aging …”

“…Further studies showed that the aging process influences the color of all‐ceramic systems . In some composites the translucency is described as stable regardless of aging . On the other hand, other studies showed an influence of aging on the translucency and perceivable changes of TP (ΔTP > 2) for composites .…”