Targeted Endodontic Microsurgery: A Clinically Oriented Assessment of Three 3D Printers

Abstract

Introduction: This study assessed the performance of 3-Dimentional printers (3DPs) in producing guides for Targeted Endodontic Microsurgery (TEMS). Methods: A pilot study determined print-product nuances for the Objet260 Connex3 (Stratasys Ltd, Austin, TX), Form2 (FormLabs Inc, Somerville, MA) and Duplicator7v1.4 (Wanhao, Zhejiang, China). Part I: A template with five cylindrical holes was designed and printed thirty times by each 3DP. The mean differences between the printed diameters and the design were subjected to univariate ANOVA and post-hoc Tukeys test. Part II: A maxilla from a successful published clinical case was printed with a cylindrical TEMS trephine path reproducing the actual clinical osteotomy and root end resection path. The same STL file used to print the original clinical guide was used to produce thirty guides (3DSGs) from each printer. Guides were seated and a cylinder precisely replicating trephine bur dimensions was inserted through the guide and into the osteotomy. If the guide dictated a path that did not allow for insertion to full depth of the trephine path, the stent was considered unacceptable. Data was analyzed using Fishers exact test. Results: Part I: The Objet260 had the lowest mean deviation from the design (0.044mm- 0.067mm) followed by the Form2 (0.099-0.166mm) and the Duplicator7 (0.222-0.321mm). The differences were statistically significant (p<0.0001). Part II: All 3DSGs from the Objet260 and Form2 guided the cylinder to full depth. Only 22/30 (73.3%) 3DSGs from the Duplicator7 guided the cylinder to full depth, which was a statistically significant difference (p=.0046). Conclusions: The Form2 and the Objet260 consistently produced suitable TEMS 3DSGs.

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Document Details

Document Type
Technical Report
Publication Date
Jun 30, 2019
Accession Number
AD1127752

Entities

People

  • James A. Wealleans
  • Jarom J. Ray
  • Julie A. Anderson

Organizations

  • Uniformed Services University of the Health Sciences

Tags

DTIC Thesaurus Topics

  • Acceptability
  • Accuracy
  • Additive Manufacturing
  • Air Force
  • Calibration
  • Computer-Aided Design
  • Department Of Defense
  • Depth Indicators
  • Diameters
  • Fabrication
  • Fused Deposition Modeling
  • Manufacturing
  • Measurement
  • Models
  • Pilot Studies
  • Printing
  • Prosthetics
  • Standards
  • Stereolithography
  • Three Dimensional
  • Universities
  • X-Ray Computed Tomography

Fields of Study

  • Medicine

Readers

  • Battery Technology and Engineering
  • Computer Engineering
  • Systems Analysis and Design