DOI: 10.4103/tdj.tdj_242_25 ISSN: 1687-8574

Fracture resistance of capped versus uncapped mesio-occlusal-distal fiber-reinforced composite restorations

Kholood El Sayed Morsy, Hend A. Ibrahim
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Objective

To evaluate the fracture resistance of teeth restored with fiber-reinforced composite material applied in one bulk layer versus capped with universal composite restoration regarding intact teeth.

Materials and methods

Forty human sound freshly extracted maxillary premolars were chosen, mounted in acrylic resin blocks 1 mm below the cementoenamel junction, leaving the crown completely exposed. Mesio-occlusal-distal cavities were prepared in each specimen with the dimensions of 4 mm buccolingual width and 4 mm depth without proximal box. All specimens were divided randomly and equally into four groups ( n =10) regarding restorative materials used as follows: group I, intact teeth without any cavity preparation (negative control), group II, cavities without any restorations (positive control), group III cavities were restored with EverX Flow bulk fill fiber-reinforced composite alone, group IV cavities were restored with EverX Flow fiber-reinforced composite capped with a layer of universal composite. The materials under investigation were applied to the prepared cavities with the recommended adhesive following their manufacturer’s instructions. After storage for 24 h period in distilled water at 37°C, all the specimens were subjected to thermocycling. Fracture resistance testing was performed with a universal testing machine. Mode of fracture was evaluated.

Results

The data was collected, tabulated, and analyzed statistically. The highest fracture resistance was recorded in group I (intact teeth) followed by group IV, cavities restored with EverX Flow capped with universal composite, followed by group III, cavities restored with EverX Flow alone while group II (cavities without any restorations) recorded the lowest fracture resistance. There was a statistically significant difference between group II and all other groups ( P =0.000). While there were no statistically significant differences between groups I, III, and IV.

Conclusions

EverX Posterior fiber-reinforced composite capped with universal composite enhanced the teeth’s resistance to fracture comparable to intact teeth.

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