Abstract
Restorative dentists have the clinical impression that endodontically treated teeth are more friable and fracture more easily. The object of this study was to determine the water content of pulpless teeth as one of the possible factors contributing toward tooth brittleness. Extirpation of pulps from dog teeth was followed by extraction of the teeth after predetermined time intervals so that the value for the water content could be plotted against time. The total water content of each tooth was divided into the free water and bound water. The free water was determined gravimetrically. The bound water was tested by a Differential Thermal Analysis, which graphically reproduced the total moisture content of the calcified tissues. There was 9 per cent less moisture in the calcified tissues of pulpless teeth than in those of vital teeth.
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