27. Evaluation of flexural strength of digital restorations for primary teeth
Main Article Content
Abstract
Restoration of primary anterior teeth requires materials with high aesthetics, good mechanical properties, and minimally invasive fabrication techniques. Digital technologies such as CAD/CAM and 3D printing have opened up numerous applications in pediatric dental restorations. This in vitro study was conducted to evaluate and compare the flexural strength of four types of digitally fabricated primary anterior crowns: 3D-printed resin crowns (RC), CAD/CAM hybrid ceramic crowns (HC), CAD/CAM PMMA crowns (PC), and CAD/CAM zirconia crowns (ZC). A total of 20 crowns (5 crowns/group) were designed and digitally fabricated based on a standardized prepared primary maxillary incisor. The flexural strength of each crown was measured using a flexural force test on a universal mechanical testing machine. The results showed that CAD/CAM zirconia crowns had the highest flexural strength (1507 ± 632.9N), which was significantly superior (p < 0.001) to all other crown groups. RC, HC, and PC crowns showed no significant difference in flexural strength. Resin crowns still met the basic flexural strength requirements for restoring primary anterior teeth.
Article Details
Keywords
Flexible Strength, Digital restoration, Primary teeth, 3D printing, CAD/CAM
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