Abstract
Various kinds of dowel and cores of the patients were examined at the Tsurumi University Dental Clinic during from February to June 1993.
The results were as follows:
1. Plastic materials, having composite resin, decreased from 28% of the previous report to 8% and cast metal dowel and cores increased from 68% to 92%.
2. In cast dowel and cores, Ag-Pd-Cu-Au alloy indicated almost the same frequency, 87%, however, Ag-Pd-Cu-Au alloy decreased from 14% of the previous report to 2%. On the other hand castable ceramic appeared.
3. In plastic materials, composite resin decreased remarkably, from 91% to 44%, and dental cements increased from 9% to 53%.
4. In both anterior and posterior teeth, condition of remaining tooth structure was worse in the present examination than in the previous report.
5. In luting cements for dowel and cores, zinc phosphate cement decreased remarkably and glass polyalkenoate cement increased from 26% to 49%.
