Table 3.

Results of the Bland-Altman test for different modalities and observers. Bias: asymmetric distribution of the discrepancies between the modalities. Limits of agreement: 95 % of the data fall between these limits

Modality	Bias (±SD)	95 % limits of agreement
		Lower	Upper
Observer 1, tooth vs histo	−0.46 ± 1.30	−3.00	2.08
Obs. 2, tooth vs histo	0.0 ± 1.38	−2.70	2.70
Obs 1, tooth vs photo	0.43 ± 1.19	−1.90	2.75
Obs 2, tooth vs photo	−0.60 ± 1.21	−1.90	2.75
Obs 1, photo vs histo	0.03 ± 1.17	−2.25	2.31
Obs 2, photo vs. histo	0.59 ± 1.31	−1.98	3.16
Obs 3, photo vs histo	0.15 ± 1.54	−2.68	3.15
Obs 4, photo vs histo	0.67 ± 1.24	−1.74	3.10