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February 5, 2026MaterialsOpen Access

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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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Fracture Resistance of 3-Unit Zirconia Fixed Dental Prostheses Differing in Wall Thickness Fabricated by Either 3D-Printing or Milling2025 · 3 citations
  2. 2Accuracy and Fit of Three-Unit Dental Restorations Fabricated from 3D-Printed Resins and CAD/CAM Milling Materials: A Micro-CT Study2026 · 2 citations
  3. 3Digital fabrication accuracy and fit analysis of additively and subtractively manufactured zirconia fixed dental prostheses.2026
  4. 4Digital fabrication accuracy and fit analysis of additively and subtractively manufactured zirconia fixed dental prostheses2026
  5. 5Comparison of marginal and internal fit of 3-unit monolithic zirconia fixed partial dentures fabricated from solid working casts and working casts from a removable die system2024