Localization of Calcium Placed over Amputated Pulps in Dogs' Teeth

¹ Department of Oral Diagnosis and Oral Medicine, Alpha Omega Postgraduate and Research Center, Hebrew University—Hadassah School of Dentistry, Jerusalem

Forty-two teeth in two dogs were subjected to pulp amputations. The exposed pulps were covered with a paste of calcium hydroxide containing radioactive calcium (Ca⁴⁵). New dentin roofs were formed over the exposed pulps in every tooth examined 3 or see figure in pdf more weeks after operation, in a manner previously described by Zander,⁴ Nyborg,³ and others.² Radioautographs showed that the radiocalcium was confined to the area of the calcium hydroxide dressing, with some slight diffusion along the adjacent dentinoenamel junction. The presence of radiocalcium could not be demonstrated within the newly formed dentin roof over the amputated pulp. This study does not support the hypothesis that the calcium in the calcium hydroxide enters into the formation or calcification of the new dentin bridge.

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