Effects of Post-Curing Time on the Mechanical and Color Properties of Three-Dimensional Printed Crown and Bridge Materials

Polymers

卷:12

Dasun Lee¹  Dohyun Kim¹  Ji-Suk Shim²  Seung-Ho Shin³  June-Sung Shim³  Na-Eun Nam³  Kyu-Hyung Park³  Jong-Eun Kim³ 

[1] Department of Conservative Dentistry, Yonsei University College of Dentistry, Yonsei-ro 50-1, Seodaemun-gu, Seoul 03722, Korea;

[2] Department of Dentistry, Korea University Guro Hospital, Guro-gu, Seoul 08308, Korea;

[3] Department of Prosthodontics, Yonsei University College of Dentistry, Yonsei-ro 50-1, Seodaemun-gu, Seoul 03722, Korea;

关键词: additive manufacturing;    three-dimensional printing;    rapid prototyping;    post-curing;    CAD/CAM;    flexural strength;   

DOI  :  10.3390/polym12112762

来源: DOAJ

【 摘 要 】

Three-dimensional (3D) printing is increasingly being utilized in the dental field. After fabricating a prosthesis using a 3D printed resin, a post-curing process is required to improve its mechanical properties, but there has been insufficient research on the optimal post-curing conditions. We used various 3D printed crown and bridge materials in this study, and evaluated the changes in their properties according to post-curing time by evaluating the flexural strength, Weibull modulus, Vickers hardness, color change, degree of conversion, and biocompatibility. The obtained results confirmed that the strength of the 3D printed resin increased when it was post-cured for 60–90 min. The Vickers hardness, the degree of conversion, and biocompatibility of the 3D printed resins increased significantly around the beginning of the post-curing time, and then increased more gradually as the post-curing time increased further. It was observed that the color tone also changed as the post-curing time increased, with some groups showing a ΔE₀₀ value of ≥ 2.25, which can be recognized clinically. This study has confirmed that, after the printing process of a 3D printed resin was completed, a sufficient post-curing time of at least 60 min is required to improve the overall clinical performance of the produced material.

【 授权许可】

Unknown