CBCT Assessment of Ethmoid Roof Variations through Keros, Gera, and TMS Classifications

Table 2

The distributions of Keros, Gera, and TMS classification scores according to the side.

Variables	Right side		Left side		Total
	N	Percentage	N	Percentage	N	Percentage
Keros score 1	84	22.6	68	18.3	152	20.43
Keros score 2	243	65.3	250	67.2	493	66.26
Keros score 3	45	12.1	54	14.5	99	13.31
Total	372	100	372	100	744	100
Gera score I	96	25.8	124	33.3	220	29.57
Gera score II	241	64.8	216	58.1	457	61.42
Gera score III	35	9.4	32	8.6	67	9.01
Total	372	100	372	100	744	100
TMS score 1	353	94.9	357	96	710	95.43
TMS score 2	18	4.8	13	3.5	31	4.17
TMS score 3	1	0.3	2	0.5	3	0.40
Total	372	100	372	100	744	100