Studies on the Retentive Strength of Polycarboxylate cements and pulp Reaction
1983 Volume 27 Issue 4 Pages 767-773
Details
1983 Volume 27 Issue 4 Pages 767-773
In order to determine the clinical assessment of the polycarboxylate cements, some test were made on four commercially available polycarboxylate cements and one zinc phosphate cement as control.
The findings are as follows:
1. Tensile strength of the polycarboxylate cements obtained with the crown model was similar or stronger than that of zinc phosphate cement. Tensile strength with taper 1/10 crown model was significantly stronger than that with taper 2/10 crown model.
2. In case of the shear strength at dentine-polycarboxylate interface on smooth surface was stronger than on rough surface, and the result showed that adhesion was due to chelate bond. While the shear strength at dentinecement interface obtained with polycarboxylate cements was variable, it was certainly superior to that obtained with zinc phosphate cement.
3. The shear strength of polycarboxylate cements was more than twice that of zinc phosphate cement.
4. The polycarboxylate cements were not irritant to dental pulp.
5. The properties obtained with these test made the polycarboxylate cement the material of choice for cementing full crown restorations and bridge work on vital teeth.
