Abstract
The collarless porcelain veneer crown has been advocated in several reports and is actually in use recently. However, this sort of technique has not yet been applied to the resinveneered prosthesis.
The present study was planned as a way to investigate the possibility of the collarless resinveneered crown. Thus, the influence of the differences in shape of metal frameworks, the effectivenessof hardening heat treatment and adhesive luting agents, and the properties of veneeringresins were examined by measuring the strain on the cervical part of the crowns caused by staticpressure.
The results of the investigation are as follows:
1. In the experiment using metal frameworks without veneering resin, the differences inshape did not exert any influence and the thick underlying metal was better than the thin one.
2. In the experiment using test pieces of resin veneered crown, the influence of differencesin shape was negligible.
3. The hardening heat treatment was not effective within the range of elastic transformation.
4. The strain on crowns veneered with CESEAD had a magnitude smaller than the strain onthose veneered with New-METACOLAR L.
5. The strain on resins of veneered crowns had a magnitude larger than the strain on metalframeworks with the same shape.
