Fig. 2From: Comparing the shear bond strength of veneering materials to the PAEKs after surface treatmentsThe box plot interval of test groups. The red hyphens show the lower limit of SBS as 5 MPa (y) and the clinically acceptable level of 10 MPa (x). * Indicates the significant differences between PEEK and PEKK groups with the same surface treatment and veneer material, according to the independent samples t-Test (p < 0.05)Back to article page