From: Comparison of tensile bond strength of ball attachments made of different materials to root canal dentin after chewing simulation
Attachment group
T value
P value
T0
Pre aging
T1
Post aging
X (MPa)
SD
Group TI
6.5
0.28
5.08
0.22
27.05
 < .00001
Group PE
18.96
0.37
9.57
0.32
48.36
Group PK
19.24
0.24
9.64
0.35
75.27