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February 5, 2026Materials0 citationsOpen Access

Comparison of Marginal and Internal Fit of 3D Printed versus Milled Dental Prostheses

Fit of Three-Unit Posterior Fixed Dental Prostheses Made from Tetragonal Zirconia Polycrystal by 3D Printing and Milling

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Authors

JKJana KostunovJCJannis CrocollSHSebastian Hetzler

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Overview

Comparative analysis assesses fit of 3D-printed and milled dental prostheses in tooth restorations, suggesting structural needs for optimal outcomes.

Key Points

  • The research aims to evaluate the fit of 3D-printed versus milled three-unit fixed dental prostheses made from tetragonal zirconia polycrystal.
  • Designed three-unit FDPs for a typodont maxillary model with specific crown preparations.
  • Fabricated 40 3D-printed FDPs with varying wall thickness and support structures; included a control group of 10 milled FDPs.
  • Assessed cement gap dimensions after adhesive cementation using a digital microscope and compared the fit between test groups.
  • Milled FDPs displayed the best marginal fit, with lower gap widths compared to 3D-printed FDPs.
  • 3D-printed FDPs without support structures showed the worst fit, with notably larger gap widths at margins.
  • Introducing additional support frames improved the marginal fit of 3D-printed FDPs, especially those with thinner walls.

Cite This Study

Kostunov et al. (2026) studied this question.

synapsesocial.com/papers/69843574f1d9ada3c1fb44a5https://doi.org/10.3390/ma19030597
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