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The dimensional changes (mean and standard deviation) of the three denture base materials over time.
| Base material | Time | |||||
|---|---|---|---|---|---|---|
| After 4 months | After 8 months | After 12 months | ||||
| Mean | SD | Mean | SD | Mean | SD | |
| Acrylic resin fabricated by conventional technique | 1.52 | 0.014 | 1.56 | 0.018 | 1.59∗ | 0.02 |
| Acrylic resin fabricated by injection moulding technique | 1.58∗ | 0.019 | 1.6∗ | 0.022 | 1.63∗ | 0.027 |
| Cobalt chrome metallic | 1.5 | 0.01 | 1.5 | 0.01 | 1.5 | 0.01 |
∗Statistically significant.
