[The use of the measurement for the electrical resistance in order to standardize experimental cavities]

For histological examination of the pulp responses to dental materials vital teeth are needed with an expected thickness of the cavity floor between 0.2 and 1.0 mm (DIN 13,930). In order to control the thickness of the cavity floor we used a method based on the measurement of the electrical resistance of the dentine layer, as previously described. The obtained results by evaluation the thickness of the floor of class V cavities, using the domestic pig as a model, indicate the accuracy of our method. Further, it was possible to identify locations of the cavity floor characterized by minimal dentinal tubules thickness.