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Effect of LRC on the alveolar bone loss. (a) Representative photos taken from upper left incisor teeth. Scale bars indicate 3.00 mm. (b) Alveolar bone loss scores. Horizontal alveolar bone loss, the distance from the cusp tip to the alveolar bone, was measured. All values are expressed as mean ± SD of ten rats. Significant versus intact vehicle control group, ** p < 0.01; versus EPD control group, ## p < 0.01.
