[HIRANUMA-1] Changes in colour and surface characteristics of three different ceramic materials after application of Silver Diammine Fluoride (SDF)
[Abstract]
Objectives: To investigate the effect of application of silver diammine fluoride (SDF) on the colour and surface characteristics of ceramic materials under different surface treatment regimes.
Methods: Seventy-eight specimens of each of the 3 mol% yttria-stabilized tetragonal zirconia polycrystal (3Y-TZP), 5 mol% yttria-stabilized tetragonal zirconia polycrystal (5Y-TZP) and lithium disilicate (LDS), were divided into 6 groups and received different surface treatments. Colour of each specimen was measured with a spectrophotometer at baseline, 1, 3 and 7 days and was recorded in CIELab colour system. Colour change (ΔEab) between treatment groups was analyzed by Kruskal-Wallis H test, and subsequent post-hoc analyses using Dunn’s test with Bonferroni correction. Scanning electron microscope (SEM) analyses were performed on one specimen from each treatment group.
Results: Significant colour changes against other treatment groups were observed for groups treated with SDF following by blot drying and silver nitrate (AgNO3) followed by blot drying versus other treatment groups (p < 0.05). SEM images showed distinctive crystals formed in 3Y-TZP specimens treated with SDF and discrete cuboidal precipitates in other materials. Amorphous clusters were observed in materials treated with AgNO3.
Conclusion: 38% SDF followed by blot drying produced discernible colour change on 3Y-TZP, 5Y-TZP and lithium disilicate.
トピックス
●colour
●ceramic
●silver diamine fluoride
Objectives: To investigate the effect of application of silver diammine fluoride (SDF) on the colour and surface characteristics of ceramic materials under different surface treatment regimes.
Methods: Seventy-eight specimens of each of the 3 mol% yttria-stabilized tetragonal zirconia polycrystal (3Y-TZP), 5 mol% yttria-stabilized tetragonal zirconia polycrystal (5Y-TZP) and lithium disilicate (LDS), were divided into 6 groups and received different surface treatments. Colour of each specimen was measured with a spectrophotometer at baseline, 1, 3 and 7 days and was recorded in CIELab colour system. Colour change (ΔEab) between treatment groups was analyzed by Kruskal-Wallis H test, and subsequent post-hoc analyses using Dunn’s test with Bonferroni correction. Scanning electron microscope (SEM) analyses were performed on one specimen from each treatment group.
Results: Significant colour changes against other treatment groups were observed for groups treated with SDF following by blot drying and silver nitrate (AgNO3) followed by blot drying versus other treatment groups (p < 0.05). SEM images showed distinctive crystals formed in 3Y-TZP specimens treated with SDF and discrete cuboidal precipitates in other materials. Amorphous clusters were observed in materials treated with AgNO3.
Conclusion: 38% SDF followed by blot drying produced discernible colour change on 3Y-TZP, 5Y-TZP and lithium disilicate.
トピックス
●colour
●ceramic
●silver diamine fluoride