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Article Abstract
This study aimed to evaluate the fracture resistance of different bonding materials used in fragment reattachment for uncomplicated crown fractures, compared to direct composite resin restoration. Sixty human maxillary incisors were divided into five groups (n = 12): G1, control; G2, direct composite resin; G3, flowable composite; G4, preheated composite; G5, self-adhesive resin cement. After simulated fractures and thermocycling, fracture resistance was tested using a universal machine. Data were analysed with one-way ANOVA and Tukey's test (α = 0.05). G1 showed the highest resistance (75.7 ± 10.5 MPa); G2 the lowest (44.7 ± 7.9 MPa). G4 and G5 showed significantly higher resistance than G2 (p < 0.001). No significant difference was found amongst G3-G5 (p > 0.05). Preheated composite and self-adhesive resin cement demonstrated improved fracture resistance compared to direct composite resin. Appropriate material selection may enhance the long-term performance of fragment reattachment in uncomplicated crown fractures.
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