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Evaluation of Mechanical Properties of Three dimensional Printed Flexible Denture Resin according to Post-polymerization Conditions: A Pilot Study

 Sang-Yub Lee  ;  Jung-Hwa Lim  ;  June-Sung Shim  ;  Jong-Eun Kim 
 Journal of Korean Dental Science, Vol.15(1) : 9-18, 2022-06 
Journal Title
Journal of Korean Dental Science
Issue Date
Mechanical properties ; Post-polymerization conditions ; 3D printed flexible denture ; 3D printed flexible denture resin
Purpose: The purpose of this study was to evaluate whether three-dimensional (3D)-printed flexible denture resin has suitable mechanical properties for use as a thermoplastic denture base resin material.
Materials and Methods: A total of 96 specimens were prepared using the 3D printed flexible denture resin (Flexible Denture). Specimens were designed in CAD software (Tinkercad) and printed through a digital light-processing 3D printer (Asiga MAX UV). Post-polymerization process was conducted according to air exposure or glycerin im mersion at 35°C or 60°C and for 30 or 60 minutes. The maximum flexural strength, elastic modulus, 0.2% offset yield strength, and Vickers hardness of 3D-printed flexible denture resin were assessed.
Result: The maximum flexural strength ranged from 64.46±2.03 to 84.25±4.32 MPa, the 0.2% offset yield strength ranged from 35.28±1.05 to 46.13±2.33 MPa, the elastic modulus ranged from 1,764.70±64.66 to 2,179.16±140.01 MPa, and the Vickers hardness ranged from 7.01±0.40 to 11.45±0.69 kg/mm2 .
Conclusion: Within the limits of the present study, the maximum flexural strength, 0.2% offset yield strength, elastic modulus, and Vickers hardness are sufficient for clinical use under the post-polymerization conditions of 60°C at 60 minutes with or without glycerin precipitation.
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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
Shim, June Sung(심준성) ORCID logo https://orcid.org/0000-0003-1428-0122
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