The Effects of Ethane-1-Hydroxy-1, 1-Diphosphonate (EHDP) on the Local Calcergy in Rats

The effects of high doses of EHDP on the local Pb-acetate induced calcergy were studied in young female rats. A plaque of hydroxyapatite crystals was produced by local subctaneous injection of a lead acetate dilution. Reactions at injection site of dilution were evaluated by the mean diameter and the dry weight of the calcified wheals. At high doses of EHDP (above 20mg/kg/day), the hydroxyapatite crystal deposition were inhibited significantly.