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Table 2 Means (SD) for degree of C = C conversion and repair bond strength*

From: Experimental methacrylate-based primers to improve the repair bond strength of dental composites – a preliminary study

Group Degree of C = C conversion, % Repair bond strength, MPa
P0 42.2 (1.9)a 26.5 (11.7)a
P10 40.6 (2.7)a 19.0 (9.3)a
P20 30.8 (5.5)b 21.8 (10.2)a
P30 26.3 (2.1)c 19.7 (8.2)a
P40 22.1 (4.8)d 26.0 (8.3)a
Control - 7.2 (2.1)b
Linear regression** R2= 0.961; p < 0.01 R2< 0.001; p = 0.983
  1. *Distinct letters in each column indicate statistically significant differences (p < 0.05).
  2. **Linear regression analysis between acidic methacrylate concentration vs. C = C conversion or bond strength (p < 0.05).