Table 3. Relationship between the ZT width and the SP.

		ZT width
	≤ 5mm		6-10mm		>10mm
Distance	Right	Left	Right	Left	Right	Left
from SP	n (%)	n (%)	n (%)	n (%)	n (%)	n (%)
0 mm	0 (0)	0 (0)	6 (30)	5 (27.7)	6 (100)	5 (100)
<5mm	3 (60)	4 (80)	10 (50)	12 (66.6)	0 (0)	0 (0)
≥ 5mm	2 (40)	1 (20)	4 (20)	1 (5.5)	0 (0)	0 (0)