The effect of calcium overdosages on the rate of eruption and periodontal ligament of lower incisor in albino rats.

The study was conducted to determine the effect of calcium overdosages on the rate of eruption of lower incisor in albino rats. The experiment was carried out on a group of rats, and calcium was supplemented to the experimental animals in a dose of 450 mgm CaCl2/100 gm diet. The lower right incisor in control and experimental rats was transected out to the level of gingival margin and then the emerged portion of the growing tooth was measured twice weekly for the determination of eruption rate. The periodontal ligament of the tooth was examined to detect any histological change. The results indicated acceleration in rate of eruption of the tooth secondary to calcium administration, increase in thickness and vascular supply of its periodontal ligament and increase in the height of inner enamel epithelial cells and cellularity of enamel organ at the base of the root.