0 55

Cited 0 times in

Effect of airborne particle abrasion treatment of two types of 3D-printing resin materials for permanent restoration materials on flexural strength

 You-Jung Kang  ;  Hoon Kim  ;  Jiho Lee  ;  Yeseul Park  ;  Jee-Hwan Kim 
 DENTAL MATERIALS, Vol.39(7) : 648-658, 2023-07 
Journal Title
Issue Date
Dental Materials* ; Flexural Strength* ; Materials Testing ; Printing, Three-Dimensional ; Surface Properties
3D-printing resin ; Airborne-particle abrasion ; Dynamic mechanical analysis ; Flexural strength ; Nano-indentation ; Surface treatment ; Weibull analysis
Objectives: This study aimed to assess the effects of airborne-particle abrasion (APA) on the flexural strength of two types of 3D-printing resins for permanent restoration. Methods: Two types of 3D printing resins (urethane dimethacrylate oligomer; UDMA, ethoxylated bisphenol-A dimethacrylate; BEMA) constituting different components were printed. The specimen surfaces were subjected to APA using 50 and 110 & mu;m alumina particles under different pressures. The three-point flexural strength was measured for each surface treatment group, and a Weibull analysis was performed. Surface characteristics were analyzed via surface roughness measurements and scanning electron microscopy. Dynamic mechanical analysis and nano-indentation measurements were limited to the control group. Results: The three-point flexural strength according to the surface treatment was significantly lower in the UDMA group for large particle sizes and at high pressures; the BEMA group demonstrated low flexural strength for large particle sizes regardless of the pressure. After thermocycling, the flexural strengths of UDMA and BEMA significantly decreased in the group subjected to surface treatment. The Weibull modulus and characteristic strength of UDMA were higher than those of BEMA under different APA and thermocycling conditions. As the abrasion pressure and particle size increased, a porous surface formed, and the surface roughness increased. Compared with BEMA, UDMA featured a lower strain, greater strain recovery, and a negligible increase in modulus according to strain. Significance: Thus, surface roughness increased with the sandblasting particle size and pressure of the 3Dprinting resin. Hence, a suitable surface treatment method to improve adhesion can be determined by considering physical property changes.
Full Text
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Prosthodontics (보철과학교실) > 1. Journal Papers
Yonsei Authors
Kang, You-Jung(강유정)
Kim, Jee Hwan(김지환) ORCID logo https://orcid.org/0000-0002-0872-4906
사서에게 알리기


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.