Table 3.

Fraction of accurate predictions of depth in regard to teeth without and with amalgam restorations.

Mode	True depth = 3				True depth = 2				True depth = 1				No lesion present
	Without ARa (17 surfaces)		With ARb (17 surfaces)		Without ARa (13 surfaces)		With ARb (13 surfaces)		Without ARa (13 surfaces)		With ARb (13 surfaces)		Without ARa (30 surfaces)		With ARb (4 surfaces)
	Exact match	2 or 3	Exact match	2 or 3	Exact match	1, 2, or 3	Exact match	1, 2, or 3	Exact match	1 or 2	Exact match	1 or 2	No lesion (0)	0 or 1	No lesion (0)	0 or 1
Mode 1	0.90	0.97	0.86	0.95	0.78	1.00	0.67	0.95	0.76	0.90	0.89	0.94	0.94	0.98	0.69	0.90
Mode 2	0.76	0.88	0.86	0.90	0.33	0.78	0.29	0.90	0.48	0.62	0.61	0.78	0.60	0.88	0.28	0.54
Mode 3	0.76	0.88	0.90	0.95	0.61	1.00	0.52	0.90	0.57	0.81	0.50	0.56	0.90	0.98	0.64	0.90
Mode 4	0.84	0.85	0.86	1.00	0.83	1.00	0.81	0.95	0.76	0.86	0.89	1.00	0.90	0.96	0.85	0.92

^aBlocks for teeth without amalgam restorations; ^bBlocks for teeth with amalgam restorations.