Accuracy and Performance of a Novel 3D Metal Printed Orthodontic Bracket Public Deposited

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  • March 20, 2019
  • Jackson, Christina
    • Affiliation: School of Dentistry, Department of Orthodontics
  • 3D metal printing is an emerging technology with potential to streamline bracket production for personalized and precision orthodontics. We hypothesized that the dimensional accuracy and shear bond strength (SBS) of 3D metal printed brackets are comparable to that of conventionally manufactured brackets. A novel .022 inch bracket was designed in Solidworks™, 3D printed in 316-SS via direct metal laser sintering (DMLS), and compared to two commercial bracket systems: Damon and Ti-Orthos (N=35 per system). Slots were visualized by stereomicroscope and measured with software by two examiners. SBS was measured by Instron universal testing machine. A one-way ANOVA and Tamhane’s H2 statistical analyses were performed. The 3D printed slot (.0221± .001in.) was found to be more accurate than control bracket slots (Damon=.0246± .001in.; Ti-Orthos=.0245± .005in.) (p<.001). There was no difference in SBS of the three systems (p=0.9). Our data support the use of 3D metal printing for the orthodontic bracket manufacture.
Date of publication
Resource type
Rights statement
  • In Copyright
  • Ko, Ching-Chang
  • Hershey, H. Garland
  • Stevens, Clarke
  • Master of Science
Degree granting institution
  • University of North Carolina at Chapel Hill Graduate School
Graduation year
  • 2017

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