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KMID : 0376319910030010299
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Dental Journal of CNU
1991 Volume.3 No. 1 p.299 ~ p.309
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DIMENSIONAL STABILITY AND SURFACE MORPHOLOGY OF VARIOUS DENTURE RESINS
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Abstract
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The purpose of this study was to investigate the dimensional changes and surface morphology of dentures processed by various polymerization conditions.
The measurements were done by taking radiograph and using vernier calipers and each specimen was observed on scanning electron microscope.
Results obtained were as follows.
1. The difference of dimensional stability was not recognized between various polymerization conditions(heatcured resin, pourtype resin, microwavecured resin, and injection molding resin).
2. There were expansion and shrinkage in the occlusal dimension, shrinkage in the frontal dimension, and expansion in the lateral dimension.
3. Scanning electron microscope pictures of heatcured resin showed dense and regular surface morphology.
4. Microwavecured resin surface appeared more regular and smooth than pourtype resin but less dense and more irregular than heatcured resin.
5. Scanning electron microscope pictures of pourtype resin with the lowest dimensional change showed the most irregular surface morphology.
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