In Vitro Evaluation of Ferrule Effect and Depth of Post Insertion on Fracture Resistance of Fiber Posts

Table 1

Descriptive statistics of fiber post fracture strength data with the significance of between-group differences.

Number group	Name group	𝑁	Mean	Std. Deviation	Median	25%–75%	Significance 𝑃<0.05
1	Ferrule-5 mm	10	163,8	72,5	142,9	132,7–181,1	AB
2	Ferrule-7 mm	10	270,9	105,6	244,9	215,2–350,3	A
3	Ferrule-9 mm	10	254,7	79,1	235,4	193,4–305,6	A
4	No ferrule-5 mm	10	40,5	3,1	40,2	38,4–44,2	C
5	No ferrule-7 mm	10	41,7	5,3	43	36,8–46,2	C
6	No ferrule-9 mm	10	44,9	6,7	44,5	40,5–51,7	BC