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Distances from root to the maxillary sinus floor. Different letters symbolize the statistic difference, p < 0.05, ANOVA test
| (mm) | |
|---|---|
| Second premolar: single root | 2.47 ± 3.45a |
| Second premolar: buccal root | 1.49 ± 3.21b |
| Second premolar: palatal root | 2.13 ± 3.13ab |
Different superscript letter means different subsets which has magnificent statistic difference. The p-value between a and b is 0.025 < 0.05
