Table 1. Intraclass correlation coefficient analyses for intra-rater reliability for LMM and for inter-rater reliability for LMM versus CASM; Bland-Altman bias analysis for intra-rater agreement for LMM and for inter-rater agreement for LMM versus CASM.

	ICC (LL; UL) for intra-rater reliability (LMMs; I1.1 and I1.2)	ICC (LL; UL) for inter-rater reliability (LMMs; I1.2 and I2.1)	ICC (LL; UL) for inter-rater reliability (CASMs; I1 and I2)	bias [μm] for intra-rater agreement (LMMs; I1.1-I1.2)	bias [μm] for inter-rater agreement (LMMs; I1.2-I2.1)	bias [μm] for inter-rater agreement (CASMs; I1-I2)
ma-b	0.993 (0.990;0.996)	0.978 (0.958;0.988)	0.984 (0.975;0.990)	-1.3	-7.6	0.8
ma-d	0.970 (0.954;0.981)	0.848 (0.702;0.915)	0.994 (0.991;0.996)	-1.0	-15.7	1.9
ax-b	0.992 (0.988;0.995)	0.984 (0.974;0.990)	0.945 (0.916;0.965)	0.9	3.5	-3.0
inc	0.998 (0.998;0.999)	0.998 (0.997;0.999)	0.999 (0.999;1.000)	2.3	-2.2	-1.4

Definitions: ICC= intraclass correlation coefficient; LL= lower limit; UL= upper limit; LMMs= light microscopy measurements; CASMs= computer-assisted measurements; I1.1 and I1.2= first and second measurements of the first investigator (LMM); I2.1= measurement of the second investigator (LMM); I1 and I2= measurements of the first and second investigators (CASM); bias= mean of differences between measurements at specific measurement points.

Measurement points: marginal-buccal (ma-b), marginal-distal (ma-d), axial-buccal (ax-b), incisal (inc).