Table 2.

Adhesive formulation, degree of conversion, polymerization rate and water miscibility^a.

Sample	Methacrylatesb (wt %)	Epoxy (wt %)	Conversion of methacrylates (%)	Polymerization rate of methacrylatesc (x 10−2 s−1)	Conversion of epoxy groups (%)	Epoxy ring- opening ratec (x 10−2 s−1)	Water miscibility (wt %)
C0	100	0	69.8±0.1	28.4±0.8	N/A	N/A	10.3±0.3
E1-25	75	25	73.4±0.0d	15.6±0.1d	N/D	N/D	6.8±0.3d
E1-25-6.8%D2O			85.1±0.6d,e	14.0±1.0d,e	N/D	N/D
E1-50	50	50	68.9±0.6d,e	11.7±0.7d,e	68.0±0.6	2.1±0.1	4.1±0.3d,e
E1-50-4.1%D2O			83.5±1.6d,e,f	10.2±0.2d,e,f	85.7±5.0f	2.4±0.1f
E2-25	75	25	79.7±0.2d,e	17.7±0.4d,e	N/D	N/D	8.7±0.3d,e
E2-25-8.7%D2O			87.9±0.2d,g,h	16.6±0.3d,g,h	N/D	N/D
E2-50	50	50	79.3±0.0d,f,h	15.0±0.2d,f,h	40.1±0.1f	1.1±0.1f	7.2±0.5d,f,h
E2-50-4.1%D2O			92.4±0.1d,i	11.7±0.8d,i	75.0±1.0i	1.8±0.3i
E2-50-7.2%D2O			97.5±0.2d,i,j	10.8±0.5d,i,j	91.9±0.9i,j	2.5±0.1i,j

E1: E1-(Silorane) containing adhesives; E2: E2-containing adhesives; E-x: x is the weight content of epoxy monomer.

^aThree-component-photoinitiator: CQ/EDMAB/OPPIH= 1.0/1.0/2.0 (wt %);

^bMethacrylates: HEMA/BisGMA =45/55;

^cFree-radical polymerization rate and epoxy ring-opening rate were used to represent the Rp/[M]_0. Statistical analysis is done separately for each column:

^dSignificant (p<0.05) difference from Control (C0);

^eSignificant (p<0.05) difference from E1-25;

^fSignificant (p<0.05) difference from E1-50.

^gSignificant (p<0.05) difference from E1-25-6.8%D₂O;

^hSignificant (p<0.05) difference from E2-25;

ⁱSignificant (p<0.05) difference from E2-50;

^jSignificant (p<0.05) difference from E2-50-4.1%D₂O.

Values are mean (± standard deviation) for n = 3 in each group. N/D: not detectable