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Salivary phosphate and calcium concentrations in uremia.

Phosphate concentration was found to be significantly elevated in the saliva of uremic patients (dialyzed and non-dialyzed) when compared to normal subjects and to dialysis patients after parathyroidectomy. Salivary calcium concentrations were similar in all groups examined. As increased salivary phosphate was found also in primary hyperparathyroidism, we attribute our findings to the secondary hyperparathyroidism of the uremic state.