Table 2.

Cross-table of ratings for NIRR from occlusal or trilateral views and for digital BWR with corresponding ratings based on µCT. Images that were not assessable are marked “na” (not applicable)

		NIRR occlusal		NIRR trilateral		BWR
		0	1	0	1	0	1	2	3	4	na	Total
µCT	0	133	25	110	48	154	0	0	0	0	4	158
	1	14	5	8	11	19	0	0	0	0	0	19
	2	21	8	11	18	23	2	2	1	0	1	29
	3	28	14	14	28	24	4	7	6	0	1	42
	4	2	0	1	1	0	0	1	0	1	0	2
	Total	198	52	144	106	220	6	10	7	1	6	250