From: An in vitro study evaluating the effect of ferrule design on the fracture resistance of endodontically treated mandibular premolars after simulated crown lengthening or forced eruption methods
Source
Sum of Squares
df
Mean Square
F
P
Ferrule
0.580
2
0.290
4.955
0.012a
Treatment method
0.009
1
0.152
0.699
Interaction
0.005
0.003
0.043
0.958
Error
2.460
42
0.059