OBJECTIVES: The aims of this study are to determine the shade correlation between try-in pastes with their corresponding resin cements. Also, to investigate the effect of resin cement shades and various ceramic thicknesses, shades, and translucency in the final color outcome over tooth-shaded backgrounds. MATERIALS AND METHOD: Lithium Disilicate CAD/CAM blocks (IPS e.max CAD) were prepared, in high and low translucency, in two different shades (A1 and A3), and in 2 different thicknesses (0.53 ± 0.02 mm and 0.83 ± 0.02 mm). Four different tooth-shaded backgrounds (ND2, ND5, ND8, and ND9) were prepared from acrylic resin in a standard thickness of 6.610 mm to achieve complete opacity. RelyX veneer cement and its corresponding try-in paste in three different shades, Transparent (TR), White Opaque (WO), and Bleached Opaque (BO), in a thickness of (80 ± 5 μm) were used. For each combination, the color was measured with a spectrophotometer to calculate the color difference (ΔΕ value) in reference to ceramic veneer, and the differences of ΔΕ among the specimens were compared statistically using JMP Pro 13. Analysis was performed for 3 aims, (1) to compare the ability of ceramic to mask the aspect of the abutment in relation to its thickness (0.5 and 0.8) mm, transparency (HT and LT) and shade (A1 and A3), (2) effect of a change in cement color (TR, WO, and BO) on the final color of the ceramic; and (3) to determine the correlation between try-in pastes with their corresponding resin cements. RESULT: A significant difference was found with a p-value of <.0001 for the following factors: Stump Shade, ceramic thickness, cured cement, ceramic shade, cement type and for the interactions of cured cement with cement type, and stump shade with ceramic transparency. Also, a significant difference was found with ceramic transparency with a p-value 0.0476. While cured cement and its corresponding try-in paste showed a significant difference in color masking (p <.0001) shade White Opaque cement and shade White Opaque try-in paste exhibited insignificant color change outcome with a p-value of 0.8051. CONCLUSION: RelyX veneer cements shades (Translucent and Bleached Opaque) have lower masking ability than White Opaque cement. RelyX veneer Try in paste is much less effective in masking than its corresponding resin cement. The only correlation between RelyX veneer cements with their corresponding try-in pastes among the shades tested (White Opaque, Translucent and Bleached Opaque) is with shade White Opaque. This study demonstrated that underlying tooth abutment color, cement color, and ceramic thickness, shade and translucency all influence the resulting optical color of CAD/CAM glass-ceramic lithium disilicate-reinforced restorations. / 2020-10-24T00:00:00Z

Syfte: Att undersöka faktorer som kan påverka vuxna individers val att bleka tänderna. Metod: En tvärsnittsstudie som baserades på en digital enkät som besvarades i februari 2024. Data analyserades med Fischers Exact test, Mann-Whitney U, Kruskal-Wallis test och Spearman´s rangkorrelationskoffecient. Signifikansnivå var ≤ 0.05. Resultat: Baseras på enkätsvar från 89 respondenter (kvinnor, n=72 och män, n=17). Resultatet tyder på att det finns en vilja att bleka tänderna och den främsta anledningen till det uppgavs att det var snyggt med vitare tänder. Ingen skillnad sågs gällande valet av tandblekningsmetod mellan individer med olika socioekonomiska förutsättningar. Självkänslan ansågs påverkad av tändernas färg, främst hos respondenter som blekt sina tänder. Slutsats: Att vitare tänder bedömdes som estetiskt tilltalande indikerar att tändernas färg har betydelse för individen. Tändernas färg hade även en påverkan på självkänslan. Viljan att förändra tändernas färg kan kopplas till det psykiska välbefinnandet och den allmänna hälsan. / Aim: To investigate factors that may influence adult individuals' choice to whiten their teeth. Method: A cross-sectional study based on a digital questionnaire answered in February 2024. Data were analysed with Fischer's Exact test, Mann-Whitney U, Kruskal-Wallis test and Spearman´s rangkorrelationskoffecient. Significance level p=≤0.05. Results: Based on questionnaire responses from 89 respondents (women, n=72 and men, n=17). The results indicate that there is a desire to whiten the teeth and the main factor is that it looks better to have whiter teeth. No difference could be seen in the choice of teeth whitening method between individual’s different socio-economic groups. Self-esteem is affected by the colour of the teeth, especially among the respondents who had whitened their teeth. Conclusion: The fact that whiter teeth are considered aesthetically attractive indicates that tooth colour is important to the individual. Tooth colour impacts self-esteem. The willingness to change the tooth colour may be linked to psychological well-being and general health.