Effect of pressure and particle size during aluminum oxide air abrasion on the flexural strength of disperse-filled composite and polymer-infiltrated ceramic network materials

Jong Eun Kim, Jung Hwa Lim, You Jung Kang, Jee Hwan Kim, June Sung Shim

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Esthetic dental computer-aided design/computer-aided manufacturing (CAD/CAM) polymers such as disperse-filled composites (DFC) and polymer-infiltrated ceramic networks (PICN) should be subjected to surface treatment before bonding. However, such treatment can lead to defect formation and a decrease in strength. Therefore, in this study, we compared the flexural strengths of DFC and PICN materials air-abraded with alumina particles of different sizes at different pressures. In addition to Weibull analysis, the samples (untreated and treated) were characterized by scanning electron microscopy and atomic force microscopy. Both DFC and PICN exhibited the lowest flexural strength at large particle sizes and high pressures. Therefore, we optimized the air abrasion parameters to maintain the flexural strength and significantly increase surface roughness. In the case of DFC, the optimal particle size and pressure conditions were 50 μm at 2 bar and 110 μm at 1 bar, while for PICN, the best performance was obtained using Al2O3 particles with a size of 50 μm at 1 bar. This study reveals that optimization of the surface treatment process is crucial in the fabrication of high-performance clinical materials for dental restorations.

Original languageEnglish
Article number1396
JournalPolymers
Volume12
Issue number6
DOIs
Publication statusPublished - 2020 Jun 1

Bibliographical note

Funding Information:
Funding: This study was supported by the Advanced Technology Center (ATC) Program funded by the Ministry of Trade, Industry and Energy (MOTIE, Korea) (10077361, Integrated System for Dental Diagnosis, Treatment Simulation & PSI (Patient Specific Instrument) Design).

Funding Information:
This study was supported by the Advanced Technology Center (ATC) Program funded by the Ministry of Trade, Industry and Energy (MOTIE, Korea) (10077361, Integrated System for Dental Diagnosis, Treatment Simulation & PSI (Patient Specific Instrument) Design).

Publisher Copyright:
© 2020 by the authors.

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Polymers and Plastics

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