Share Page:

Volume 16 , Issue 1
January/February 2003

Pages 13–18

New Die Design for Dimensional Accuracy Assessment of Crown Castings

Danny Low, MScDent, BDS, GradCertMathSc, FRACDS

PMID: 12675449

Purpose: The aim of this study was to introduce a newly designed die for ceramometal restoration, and to compare the dimensional accuracy with the traditional complete-crown design. Two methods of dimensional accuracy assessment, vertical axial discrepancy and transverse diametral percentage, were compared. Materials and Methods: Patterns were prepared from two different die designs—complete crown and ceramometal. Two investments available for titanium crown casting were used, Titavest CB and T-invest C & B. Titanium castings were made from each investment with a high-pressure casting machine. Vertical axial discrepancy of casting was determined by measuring the discrepancy for each set of wax patterns and their castings on the same die under a traveling microscope. Dimensional accuracy was expressed as vertical axial discrepancy and by transforming the vertical axial discrepancy into transverse diametral percentage. Results: Both dies produced undersized castings with T-invest C & B and oversized castings with Titavest CB. Dimensional accuracy assessment of the two different types of crown casting design showed no significant difference in vertical axial discrepancy. Conclusion: Compared to the traditional transverse diametral percentage calculation, the vertical axial discrepancy assessment is independent of the die’s dimensions. The two types of investment materials studied resulted in castings with different dimensional accuracies. Int J Prosthodont 2003;16:13–18.

Full Text PDF File | Order Article


Get Adobe Reader
Adobe Acrobat Reader is required to view PDF files. This is a free program available from the Adobe web site.
Follow the download directions on the Adobe web site to get your copy of Adobe Acrobat Reader.


© 2020 Quintessence Publishing Co, Inc

IJP Home
Current Issue
Ahead of Print
Author Guidelines
Submission Form
Quintessence Home
Terms of Use
Privacy Policy
About Us
Contact Us