Thickness and accuracy of superplastic Ti-6Al-4V alloy denture frameworks

The thickness and adaptation of superplastic forming Ti-6Al-4V alloy denture frameworks were investigated using cross-sectional measurements. The frameworks for maxillary complete dentures were fabricated form Ti-6Al-4V disks of thickness ranging from 0.75 to 1.30 mm. Although the thickness of each disk was reduced by superplastic forming, the complete framework had more than 78% of the original disk thickness. Differences in the thickness did not significantly affect either the thickness ratio of the framework to the disk or the gap discrepancy between the framework and the working cast. The accuracy of fit of the framework would satisfy ordinary clinical requirements.