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. 2025 Mar 20;25:412. doi: 10.1186/s12903-025-05602-5

Table 2.

Mean MPa values of the study groups

MPa Fracture types
(Adhesive/Cohesive/Mixed)
Group Adhesive Composite Curing Time Surface Treatment n Mean SD
1 (SB-20-SE) Single Bond Universal 20 s - 20 19.7 d, e 2.4 18/0/2
2 (SB-20-3) 3 s AE 20 22.2 e 3.8 16/1/3
3 (SB-20-15) 15 s AE 20 12.3 a, b 1.1 17/0/3
4 (SB-40-SE) 40 s - 20 19.2 c, d,e 5.3 16/0/4
5 (SB-40-3) 3 s AE 20 29 f 3 15/1/4
6 (SB-40-15) 15 s AE 20 16.8 c, d 2.7 18/1/1
7 (AU-20-SE) Adhese Universal 20 s - 20 10.9 a 3.1 15/0/5
8 (AU-20-3) 3 s AE 20 22 e 3.6 17/1/2
9 (AU-20-15) 15 s AE 20 15.7 b, c 2.1 18/0/2
10 (AU-40-SE) 40 s - 20 20.2 d, e 3.5 17/0/3
11 (AU-40-3) 3 s AE 20 29.3 f 4.2 16/2/2
12 (AU-40-15) 15 s AE 20 19.4 d, e 4.8 17/1/2

Same superscript letters show statistically homogeneous subgroups (p > 0.05)

SB: Single Bond Universal, SE: self-etch, AU: Adhese Universal, AE: asit-etching