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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).