Table 6.

Mean values of minimum cement penetration

Group	Zone 1 (mm)	Zone 2 (mm)	Zone 3 (mm)	Zone 4 (mm)
Group A (SD)	1.3 (0.9)	2.4 (1.0)	1.4 (0.5)	4.0 (1.2)
Group B (SD)	0.8 (0.6)	1.6 (0.8)	0.7 (0.4)	2.4 (0.9)
p value	0.001	<0.0001	<0.0001	<0.0001