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Accuracy of 3D Printer Technologies Using Digital Dental Models.

Şule Gökmen1, Serkan Görgülü1, Kübra Gülnur Topsakal1

  • 1University of Health Sciences Turkey, Gülhane Faculty of Dental Medicine, Department of Orthodontics, Ankara, Turkey.

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Summary

PolyJet and Digital Light Processing (DLP) 3D printing technologies demonstrate higher accuracy than Stereolithography (SLA) for digital dental models, though all methods are clinically viable. This comparison aids in selecting optimal 3D printing for dental applications.

Keywords:
3-dimensional3-dimensional printingdigital dentistrydigital models

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Area of Science:

  • Dental Technology
  • Additive Manufacturing
  • Biomedical Engineering

Background:

  • Digital dental models are crucial for modern orthodontics and prosthodontics.
  • Evaluating the manufacturing accuracy of different 3D printing technologies is essential for clinical application.

Purpose of the Study:

  • To compare the manufacturing accuracy of Stereolithography (SLA), Digital Light Processing (DLP), and PolyJet 3D printing technologies for digital dental models.

Main Methods:

  • 30 patient dental models (ages 12-20) were scanned to create reference digital files.
  • Models were 3D printed using SLA, DLP, and PolyJet technologies.
  • Printed models were scanned, and digital superimposition with reference models was performed using reverse engineering software to evaluate Root Mean Squared (RMS) values and mesiodistal measurements.

Main Results:

  • PolyJet exhibited the lowest RMS error (0.145±0.10 mm), followed by DLP (0.161±0.12 mm) and SLA (0.345±0.23 mm).
  • No statistically significant differences were found in mesiodistal measurements between the reference models and those produced by DLP, PolyJet, or SLA.

Conclusions:

  • All three 3D printing technologies (SLA, DLP, PolyJet) are clinically acceptable for producing dental models.
  • Stereolithography (SLA) demonstrated lower accuracy compared to Digital Light Processing (DLP) and PolyJet.