[Development of a light-polymerized resin for the record base. Part 1 Comparison with autopolymerizing resin]

The record block for maxillomandibular registration of the denture is absolutely necessary in order to decide the mandibular position. This record block must provide sufficient strength so as not to cause deformation in the oral cavity. It must also fit the alveolar ridge well in order to keep accurate registration. Since most of the conventional materials for this purpose are not sufficient, a new specific light-polymerized resin was experimentally developed for the record base.

The mechanical strength and suitability of the new material were examined in comparison with a conventional autopolymerizing resin.

1) The transverse strength was equivalent to that of the autopolymerizing resin. 2) Although the shear bond strength was equivalent to the autopolymerizing resin, the intensity was drastically improved by the application of composite primer. 3) The light-polymerized resin and the autopolymerizing resin did not show any difference in suitability, and it was a clinical value without problem.

From these findings, it was confirmed that the new light-polymerized resin had the physical property for clinical application as a material for the record base.