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Dye penetration depth in millimeters (indicative of microleakage) in the three groups
| Composite | Margin | Mean (μm) | Minimum (μm) | Maximum (μm) | Std. deviation |
|---|---|---|---|---|---|
| Bulk-fill (3M) | Gingival | 523.40 | 0.00 | 1508.00 | 543.50 |
| Occlusal | 93.80 | 0.00 | 808.00 | 214.17 | |
| Bulk-fill (SonicFill) | Gingival | 290.25 | 0.00 | 860.00 | 343.07 |
| Occlusal | 127.35 | 0.00 | 1254.00 | 302.04 | |
| Conventional (Z250) | Gingival | 590.20 | 0.00 | 1498.00 | 597.78 |
| Occlusal | 145.45 | 0.00 | 507.00 | 199.14 |
