Evaluation of water absorption properties and fabrication of hollow obturator model using 3d digital dentistry

Shigeto Koyama, Hiroaki Kato, Takayuki Harata, Naoko Sato, Soshi Hanawa, Keiichi Sasaki

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Fluid accumulation in the hollow spaces of obturator is a continuing problem when fabricating hollow obturator prostheses using the conventional method. To address this problem, the three-dimensional (3D) digital technology was used to evaluate water absorption in the inner hollow obturator spaces. Solid and hollow obturator specimens were fabricated using a 3D printer with photocurable resin. Then, the hermeticity was examined by leak testing. These specimens were immersed in distilled water at 37°C. Each specimen was weighed every 24 h for 120 days, and weight changes between each group were compared. Water accumulation in the hollow obturator was not visually observed. Although water absorption was significantly higher in solid specimens, the weight increase rate was also significantly higher in hollow specimens. Applying a laminating 3D photo fabrication made the fabrication of a completely unified hollow obturator model possible.

Original languageEnglish
Article numberdmj/2017-241
Pages (from-to)521-525
Number of pages5
JournalDental materials journal
Volume37
Issue number4
DOIs
Publication statusPublished - 2018

Keywords

  • 3D printer
  • Digital technology
  • Hollow obturator
  • Water absorption

ASJC Scopus subject areas

  • Ceramics and Composites
  • Dentistry(all)

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