ArticleClinical and experimental dental research2025
Marginal and Internal Adaptation of Implant-Supported Three-Unit Metal Frameworks Fabricated by the Conventional, Semi-Digital, and Fully Digital Techniques Before and After Porcelain Application.
Article in Clinical and experimental dental research, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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Who cites it
1 citing paper in PubMed.
- Apical Gap, Adaptation, and Trueness of Direct and Indirect Customized Post-and-Core Restorations Fabricated by the Casting, Milling, and Selective Laser Melting Techniques.International journal of dentistry · 2026Article
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5 authors.
Funding
Abstract
objectivesOnly a small number of studies conducted on implant-supported fixed multi-unit restorations have evaluated the semi-digital fabrication techniques. This study aimed to assess the marginal and internal adaptation of implant-supported three-unit metal frameworks fabricated by the conventional, semi-digital, and fully digital techniques before and after porcelain application. MATERIAL AND
methodsIn this in vitro study, 120 three-unit metal frameworks were fabricated by five different techniques (n = 20): fabrication of metal frameworks from hard metal by the milling technique, direct 3D-printing of metal, milling of resin pattern and subsequent casting, 3D-printing of resin pattern and subsequent casting, and conventional waxing and subsequent casting. The marginal and internal adaptation of the frameworks was evaluated before and after porcelain application by using the silicone replica technique. Data were analyzed using ANOVA followed by pairwise comparisons with the Games-Howell and paired samples tests (α = 0.05).
resultsBefore porcelain application, resin pattern milling, and subsequent casting resulted in the smallest marginal gap, while hard metal milling yielded the largest marginal gap. The fully digital techniques yielded the largest cuspal and fossa gaps, while the conventional method yielded the largest axial gap. After porcelain application, metal 3D-printing and conventional casting resulted in comparable (p = 0.109) marginal gaps, smaller than hard metal milling (p < 0.001). The conventional casting method yielded the smallest cuspal and fossa gaps (p < 0.001). Porcelain application significantly increased the gap size at all measurement points (p < 0.001).
conclusionThe fabrication technique significantly affected the marginal and internal adaptation of implant-supported three-unit metal frameworks both before and after porcelain application.
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