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Comparative Evaluation of the Marginal Accuracy of Castable Resin Materials Fabricated Using Two Different 3D
Marwa Mohd Vazeer1, Mahendranadh Reddy1, Mahadev Shastry Yelisetty1
1Prosthodontics, Sri Sai College of Dental Surgery, Hyderabad, IND.
Cureus
|June 29, 2026
Summary
Digital Light Processing (DLP) 3D printing offers superior marginal accuracy for dental castable resin patterns compared to Liquid Crystal Display (LCD) printing. Both methods produced acceptable results for porcelain-fused-to-metal copings in this study.
Area of Science:
- Dental Materials Science
- Digital Dentistry
- Additive Manufacturing
Background:
- Computer-aided design and computer-aided manufacturing (CAD/CAM) have digitized dental restoration fabrication.
- Three-dimensional (3D) printing, including Liquid Crystal Display (LCD) and Digital Light Processing (DLP), is used for castable resin patterns.
- Limited data exists on the marginal accuracy of 3D-printed castable resins.
Purpose of the Study:
- To compare the marginal discrepancy of castable resin patterns for porcelain-fused-to-metal (PFM) copings.
- To evaluate patterns fabricated using LCD and DLP 3D printing technologies.
Main Methods:
- An in vitro study used a standardized crown preparation on a typodont tooth.
- Digital scanning and CAD software designed the coping patterns.
- Patterns were fabricated using LCD (Group A) and DLP (Group B) printers (n=15 per group).
- Marginal discrepancy was measured at six points using a digital microscope.
Main Results:
- Digital Light Processing (DLP) group showed significantly lower mean marginal discrepancy (48.7 ± 8.6 µm) than the Liquid Crystal Display (LCD) group (68.5 ± 7.6 µm) (P < 0.001).
- Both printing methods yielded marginal discrepancies within the clinically acceptable range.
- DLP printing demonstrated superior marginal accuracy over LCD printing under study conditions.
Conclusions:
- Both LCD and DLP 3D printing methods can produce castable resin patterns with clinically acceptable marginal discrepancy.
- DLP printing exhibited lower marginal discrepancy compared to LCD printing for PFM copings.
- Further research may explore long-term clinical performance and material interactions.
