color stability of polished and glazed dental porcelain in chlorhexidine

Background and aim: discoloration is a major concern with regard to the use of tooth-colored restorations. type of restorative material and surface treatment are believed to play a role in this regard. this study sought to compare the color change of glazed and polished dental porcelain after 30 days of immersion in chlorhexidine (chx). materials and methods: in this in vitro, experimental study, 20 discs with 10 mm diameter and 2 mm thickness were fabricated of a1 shade of noritake porcelain using a gypsum mold. all samples had one opaque layer. they were then randomly divided into two groups of 10. glaze powder was added to porcelain in group 1, and group 2 was polished using a polishing kit. the cie l*a*b color parameters of samples were then measured using a spectrophotometer. all samples were immersed in 0.02% chlorhexidine solution for 30 days and color parameters were then measured again. change in each color parameter was compared between the two groups (polished and glazed) using t-test. results: after 30 days of immersion in chx, δe was 0.76±0.16 in the glazed and 0.89±0.16 in the polished group. the difference in this regard between the two groups was not significant (p=0.092). conclusion: both polishing and glazing confer optimal color stability to dental porcelain.