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Biomedical subjects

W E Dowden

Publications and source records attributed to W E Dowden.

9 recordsLinked to original sources
PubMed1983

An evaluation and comparison of the pulpal response to gold foil and indium alloy.

All teeth restored with gold foil had pulpal changes marked by persistent hemorrhage, destruction of odontoblasts, and inflammation. Bacteria were found more frequently on cavity walls of teeth restored with gold foil and with increasing frequency for all materials as the observation period became longer. The presence or absence of bacteria could not be related to the pulpal response for either indium alloy or gold foil. Because this and previous studies indicated that gold foil in direct contact with prepared dentin surfaces produces pulpal injury, a base to protect the pulp is indicated. Indium alloy or another appropriate base could be used for the required pulpal protection.

Animals↗
PubMed1983

The pulpal effect of freezing temperatures applied to monkey teeth.

When temperatures below -80 degrees C, are applied to intact monkey teeth via a liquid nitrogen probe for 1, 2, or 3 minutes, an increasing degree of pulpal damage occurs, but all pulps remain vital. The lesion appears to be predictable and is characterized by a distinct layer of coronal secondary dentin with cellular inclusions, odontoblast destruction, and microvascular injury. The root pulp remains essentially healthy and uninflamed. Periodontal and root tissue damage was also observed.

Animals↗