In Vitro Repair of Fractured Fiber-Reinforced Cusp-Replacing Composite Restorations

Table 3

Condition of the repaired specimens after the load test.

Group	Intact tooth substrate*		Fractured tooth substrate*
	Fracture along repaired surface	Fracture along repaired surface with new fracture surfaces	Fracture of tooth fragment below CEJ	Vertical root fracture
(A) Woven FRC basing (𝑛=7)	1	1^(1)	2	3
(B) Unidirectional FRC basing (𝑛=9)	2	6^(2)	1	0

*Difference in proportions between repaired Groups (A) and (B) statistically significant (Fisher’s exact test, 𝑃=0.04).
⁽¹⁾Resin composite material covering palatal cusp not present anymore.
⁽²⁾Resin composite material left in mesial and/or distal box.
CEJ: cementoenamel junction.