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Mean ± SD for total cement area in mm2 for study groups
| 3u-30 | 1.67 ± 0.42a | 4u-30 | 1.80 ± 0.49A |
| 3u-50 | 1.09 ± 0.25b | 4u-50 | 1.24 ± 0.34B |
| 3u-80 | 1.39 ± 0.27c | 4u-80 | 1.51 ± 0.33C |
SD, standard deviation. Different superscript letters indicate significant difference between study groups in the same column. Capital superscript letters indicate significant difference between study groups in the same row
