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Measuring the Complete-arch Distortion of an Optical Dental Impression
Published on: May 30, 2019
Accuracy of successive casts for full-arch fixed prostheses
Kiki S Dounis1, Georgia Dounis, Marcia M Ditmyer
1Department of Clinical Sciences, University of Nevada Las Vegas, School of Dental Medicine, Las Vegas, NV, USA. kiki.dounis@va.gov
The International Journal of Prosthodontics
|September 23, 2010
Summary
This study evaluated dental impression materials for full-arch restorations. Second-generation casts from single impressions showed clinically equivalent results to first-generation casts, ensuring accurate prostheses.
Area of Science:
- Dental Materials Science
- Prosthodontics
- Clinical Simulation
Background:
- Accurate full-arch impressions are crucial for fabricating well-fitting fixed dental prostheses.
- Understanding the dimensional stability of successive casts from single impressions is essential for clinical success.
Purpose of the Study:
- To compare the accuracy of different full-arch impression materials using successive casts.
- To evaluate the clinical equivalence of restorations fabricated from first- and second-generation casts.
Main Methods:
- Clinically simulated study using Dentoform models with four abutments.
- Tested polyether, polyvinyl siloxane, and putty-wash impression materials.
- Fabricated and measured marginal discrepancies of full-arch fixed dental prostheses from successive casts.
Main Results:
- No significant differences were found between successive casts for all materials tested.
- Second-generation casts exhibited clinically similar marginal discrepancies compared to first-generation casts.
- Full-arch restorations fabricated from second-generation casts were clinically equivalent to those from first-generation casts.
Conclusions:
- Second-generation casts derived from single impressions are reliable for fabricating accurate full-arch fixed dental prostheses.
- The tested impression materials demonstrate acceptable accuracy for multiple cast generations.
- This finding supports the clinical utility of successive casts in prosthodontic procedures.
