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Evaluation of the accuracy of solid implant casts
A G Wee1, R L Schneider, S A Aquilino
1Section of Restorative Dentistry, Prosthodontics and Endodontics, Ohio State University, Columbus, USA.
Summary
Resin Rock implant casts minimize framework strain and distortion. Low Fusing Alloy offers accuracy but has high dimensional variability, limiting clinical use.
Area of Science:
- Dental materials science
- Prosthodontics
- Biomaterials engineering
Background:
- Accurate implant casts are crucial for successful dental restorations.
- Previous research has not experimentally identified optimal materials for dimensionally accurate implant casts.
Purpose of the Study:
- To experimentally evaluate the dimensional accuracy of implant casts fabricated with different materials.
- To assess linear horizontal dimensional change and strain on a master framework.
Main Methods:
- Fabricated a master framework for a five-implant model.
- Poured polyether impressions in Vel-mix, Die Keen, Resin Rock, or Low Fusing Alloy.
- Measured linear distances and recorded strain gauge data.
Main Results:
- Significant differences in dimensional change and strain were observed among the four die materials.
- Low Fusing Alloy casts showed least linear change but greatest variability.
- Resin Rock casts induced significantly less strain on the framework.
Conclusions:
- Resin Rock material minimizes strain and framework distortion.
- Low Fusing Alloy provides accurate casts but its variability may limit clinical application.