Influence of Different Restorative Techniques on the Strength of Endodontically Treated Weakened Roots

Table 2

Comparison of fracture strengths of all groups.

Groups	Treatment done	Mean ± S.D. (KN)^∗	Min (KN)^∗	Max (KN)^∗	ANOVA
1	Unprepared roots	0.876 ±  .327^a	0.37	1.57	F	P
2	Prepared and unfilled weakened roots	0.193 ±  .104^c	0.06	.42	12.472	0.000
3	Roots filled with Gutta-percha only	0.618 ±  .323^b	0.24	1.21
4	Roots apically filled with Gutta-percha and restored coronally with composite and post	0.970 ±  .328^a	0.29	1.39
5	Roots filled with Resilon only	0.966 ±  .775^a	0.28	2.78
6	Roots apically filled with Gutta-percha, and restored coronally with composite and post	1.014 ±  .201^a	0.69	1.35

∗Tukey post hoc test: means with the same superscript letter are not significantly different (𝑃>0.05).