Abstract
The purpose of this study was 1) to estimate the occlusal height reproduced by working models, 2) to investigate the dimensional accuracy of complete dental arch stone casts, and 3) to estimate the relationship between 1) and 2).
The working models were made from an epoxy reference model. The reference model did not have any biologic characteristics which affect the occlusal height of working models. The occlusal height was measured using an IP-Checker. The stone casts were made from a metallic model of a simplified maxillary dentition. The dimensional accuracy of the stone casts was measured using a three-dimensional measuring microscope.
The results were as follows:
1. The occlusal height reproduced by the working models was higher than the occlusal height of the reference model.
2. The difference of the occlusal height between the reference model and the working models made from silicone impression materials and the improved dental plaster was the smallest.
3. The stone casts made from the silicone impression materials and the improved dental plaster were the most accurate.
4. This study suggested that more accurate stone casts reproduced more accurate intercuspation.
