Table 2.

Mean shear bond strength (MPa) (standard deviation) for the experimental groups (n = 10).

Group	No-Liner Subgroups	Liner Subgroups
Control	17.65 (2.98) Aa	26.99 (2.93) b
P-I	32.59 (3.58) Ba	27.80 (3.00) b
P-W	30.42 (2.27) Ba	27.84 (2.51) b
P-A	26.07 (1.93) Ca	26.78 (2.25) a

Within the no-liner subgroups, the same uppercase letter indicates lack of statistically significant difference among the groups (p > 0.05). Within the liner subgroups, one-way ANOVA revealed no significant differences in the values among the four groups (p = 0.742). For each row (each group), the same lowercase letter indicates lack of statistically significant difference between the two subgroups (p > 0.05).