Quantitative Assessment of Apically Extruded Debris after Single-Files Supplemental Retreatment considering Apical Patency Influence: In Vitro Study

Table 4

Two-way ANOVA analysis for the interaction of apical patency on the mean value of apical extrusion after the retreatment with supplementary contemporary retreatment files.

Source	Type III sum of squares	df	Mean square	F	Sig.
Corrected model	0.000^a	7	2.185E − 5	236.782	0.000
Intercept	0.001	1	0.001	13330.952	0.000
Patency	4.118E − 7	1	4.118E − 7	4.462	0.038
Apical extrusion	0.000	3	5.073E − 5	549.685	0.000
Patency apical extrusion	3.656E − 7	3	1.219E − 7	1.321	0.274
Error	6.645E − 6	72	9.230E − 8
Total	0.001	80
Corrected total	0.000	79

^aR squared = 0.958 (adjusted R squared = 0.954).