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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

Authors
 Jong-Eun Kim  ;  Jung-Hwa Lim  ;  You-Jung Kang  ;  Jee-Hwan Kim  ;  June-Sung Shim 
Citation
 POLYMERS, Vol.12(6) : 1396, 2020-06 
Journal Title
 POLYMERS 
Issue Date
2020-06
Keywords
CAD/CAM polymers ; Weibull analysis ; air abrasion ; dental restoration ; disperse-filled composite ; flexural strength ; polymer-infiltrated ceramic network
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.
Files in This Item:
T202002398.pdf Download
DOI
10.3390/polym12061396
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Prosthodontics (보철과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Jong Eun(김종은) ORCID logo https://orcid.org/0000-0002-7834-2524
Kim, Jee Hwan(김지환) ORCID logo https://orcid.org/0000-0002-0872-4906
Shim, June Sung(심준성) ORCID logo https://orcid.org/0000-0003-1428-0122
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/179373
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