Different surface treatments' effects on the colour stability of various dental porcelains

Author(s): Jiyah Ahmet

The few research reporting on the stainability of dental porcelain materials are deficient in information. The effects of polishing techniques and staining agents on the colour stability of dental porcelains, however, have not been examined in any studies. This study’s objective was to assess how various polishing methods affected the colour stability of various dental porcelains. For feldspathic (Vita VMK 95, Ceramco III), low-fusing porcelain (Matchmaker), and machinable feldspathic porcelain blocks, fifty-five examples each were made (Vitablocs Mark II). The prepared specimens were divided into 11 groups (n=5) to represent various polishing techniques. These groups included a control group (no surface treatment), glaze, and nine others that were polished using a polishing disc (Sof-Lex), two porcelain polishing kits (NTI, Dialite II), a diamond polishing paste (Sparkle), a zirconium silicate-based cleaning and polishing prophy paste (Zircate), an aluminium oxide polishing paste (Prisma Gloss) Samples were kept in a coffee solution at 37⁰C for 48 hours. A colorimeter was used to quantify the colour of each specimen both before and after exposure, and colour changes (DE) were computed. Data were examined using a two-way analysis of variance, and the Tukey’s honest significant difference test was used to compare mean values. Ceramco III has the greatest DE value among the four distinct porcelain materials. The porcelain material groups of Mark II, Matchmaker MC, and VMK 95 showed no discernible differences (P=0.074). For all of the studied porcelain materials, Group Gl had the lowest DE values when comparing the polishing methods. Groups Sl, Di, and Pk showed no significant differences (P=0.883), while Group Gl had considerably lower DE values than these groups (P<0.05).