Table 6. Assessment of the reliability of measurements.

Cast analysis	First reading (n = 30) Mean ± SD (mm)	Second reading (n = 30) Mean ± SD (mm)	ICC
IC-cusp maxilla	31.7 ± 3.2	32.1 ± 3.1	0.98
IC-cusp mandible	24.0 ± 2.8	24.3 ± 3.6	0.86
IC-gingiva maxilla	23.7 ± 2.4	24.3 ± 2.5	0.97
IC-gingiva mandible	19.1 ± 1.8	19.4 ± 1.9	0.97
IM-cusp maxilla	46.4 ± 8.1	46.2 ± 8.1	0.89
IM-cusp mandible	42.1 ± 3.4	42.4 ± 3.3	0.98
IM-gingiva maxilla	34.5 ± 3.3	34.4 ± 3.7	0.94
IM-gingiva mandible	31.9 ± 2.8	31.9 ± 3.0	0.89

n = 30; SD = standard deviation, IC = Intercanine width, IM = Intermolar width. ICC = Intraclass correlation coefficient.

ICC: > 0.75 excellent agreement, 0.4 - 0.75 fair agreement, < 0.4 poor agreement.