A statistically significant trend of decreasing MMG values was observed over the course of measuring the 24 LDS crowns with the stereomicroscopy instrument using both 12 and 360 measurement points, but not with micro-CT (Table 2 ), where the S statistic indicated the overall trend and the negative z-score indicated a decreasing trend over time.
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Comparative evaluation of marginal gaps of lithium disilicate crowns measured using stereomicroscopy and micro‑computed tomography.
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