Purpose

This study evaluated the color alterations, flexural strength and microhardness properties of

two different 3D-printed permanent crown resins.

Materials and Methods

Samples were produced from two different 3D Print permanent crown resins: Group 1

(Saremco Crowntec; Saremco, Switzerland), Group 2 (P-crown Version 2; Senertek, Turkey).

Color changes (ΔE values), flexural strenght and vickers hardness number of the samples

were calculated. Data were analyzed with Shapiro–Wilk normality test, Independent-t test,

and Mann Whitney-U tests. Significance level was accepted as P<0.05.

Results

ΔE values for red wine were found to be significantly higher in Group 1 (6.43Å}2.26;

P<0.001). The flexural strength values (MPa) of Group 1 were significantly higher than

Group 2 in all three solutions (P<0.001). There was no significant difference between the

VHN values of the samples kept in wine and coffee solutions (P= 0.271; 0.827).

Conclusion

3D printing resins are affected at different levels by coloring solutions. Microhardness and

flexural strength of 3D print samples kept in different coloring agents are different.In the use

of 3D printing resins, product selection should be made by taking into account the individual

factors such as the eating and drinking habits of the patients and the physical properties

expected from the sample.