Table 2.

Mean ± SD of micro-tensile bond strength (μTBS) in MPa in different groups after 24 h. In the rows, groups identified by different symbols are statistically different (p < 0.05). μTBS: micro-tensile bond strength. Mean ± SD for inhibition of MMP-2 and cathepsin-K activities 7 and 14 days. Comparison of MMP-2 and cathepsin-K activities (ng/mL) obtained with Human MMP-2 and cathepsin-K ELISA Kit system. Groups identified by different superscripts letter are statistically significantly different within each column. Mean ± SD of contact angle in different groups after treating with different concentrations of RB. Groups identified by different superscripts capital letters for different groups (shows differences between variables) are statistically different within each column.

Groups	μTBS	MMP-2		Cathepsin-K		Contact Angle
Time	24 h	7 days	14 days	7 days	14 days	5 min
Control group	36.21 ± 13.8 A	7.80 ± 1.7 A	11.10 ± 1.8 A	4.11 ± 2 A	5.7 ± 1.9 A	28.17 ± 8.1 C
0.5% Ribose	34.44 ± 5 B	4.10 ± 0.9 B	7.80 ± 1.4 B	2.90 ± 0.6 B	1.11 ± 2 A	8.650 ± 4.2 A
1% Ribose	39.44 ± 7.7 C	1.80 ± 1.2 C	4.40 ± 1.6 C	1.20 ± 0.3 C	0.51 ± 0.2 A	13.950 ± 3.9 A,B
2% Ribose	31.31 ± 6.7 D	0.90 ± 0.5 D	2.20 ± 0.7 D	0.40 ± 0.09 D	0.2 ± 0.1 A	22.025 ± 6.2 B,C

For each column, groups identified by different symbols are statistically different (p < 0.05). MMP-2: matrix metalloproteinases-2.