Multi-peak Light-emitting Diode Curing Units and Polymerization of 3D-printed Crown and Bridge Resin.

IF 1.4 4区医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE

Operative dentistry Pub Date : 2024-01-01 DOI:10.2341/23-061-L

S H Chung, E-S Jiang, B-S Lim, S-H Kim, J Chang

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引用次数: 0

Abstract

Purpose: This study aimed to evaluate the substitutive and additive efficacy of multi-peak light-emitting diode (LED) curing units for post-curing of a three-dimensional- (3D-) printed crown and bridge resin.

Methods: A total of 792 disc- and 180 bar-shaped specimens were printed with a crown and bridge resin (NextDent C&B MFH) and post-cured using two LED curing units (VALO Cordless and Bluephase N G4) in fast and standard modes. Conventional post-curing (LC-3D Print Box, Group PC) was compared with LED-only curing (Groups V1, V2, B1, and B2) and LED-combined curing (Groups PV1, PV2, PB1, and PB2) in terms of microhardness, flexural strength, degree of conversion (DC), and CIE L*a*b* color and translucency parameters. Cytotoxicity of the resin eluates was evaluated using the WST-1 assay. Temperature increases on the resin surface were measured with infrared thermography. Data were statistically analyzed using ANOVA and Kruskal-Wallis tests (α=0.05).

Results: The microhardness and flexural strength in Groups V1, V2, B1, and DC in all LED-only groups were lower than in other groups (p<0.05). Larger color disparities existed between Group PC and all LED-only groups than between Group PC and the others (p<0.05). There was no significant difference in cytotoxicity among the groups. The temperature increase was lowest in Groups V1 and PV1 during light curing (p<0.05).

Conclusions: Post-curing by multi-peak LED curing units was not as effective as the conventional post-curing device. Additional post-curing by LED curing units did not improve the material properties.

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多峰发光二极管固化单元及3d打印冠桥树脂的聚合。

目的:本研究旨在评价多峰发光二极管(LED)固化单元在三维(3D)打印冠桥树脂后固化中的替代和加性效果。方法:用冠桥树脂(NextDent C&B MFH)打印792个圆盘形和180个条形标本，并使用两个LED固化装置(VALO Cordless和Bluephase N G4)在快速和标准模式下进行后固化。将常规后固化(LC-3D Print Box, PC组)与纯led固化(V1、V2、B1和B2组)和led复合固化(PV1、PV2、PB1和PB2组)在显微硬度、抗弯强度、转换度(DC)、CIE L*a*b*颜色和半透明参数方面进行比较。采用WST-1法评价树脂洗脱液的细胞毒性。用红外热像仪测量了树脂表面的温升。资料采用方差分析和Kruskal-Wallis检验进行统计学分析(α=0.05)。结果:纯LED组V1、V2、B1和DC组的显微硬度和抗弯强度均低于其他组(p结论:采用多峰LED后固化装置后固化效果不如常规后固化装置。LED固化单元的额外后固化并没有改善材料的性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Operative dentistry 医学-牙科与口腔外科

CiteScore

4.00

自引率

9.10%

发文量

124

审稿时长

6-12 weeks

期刊介绍： Operative Dentistry is a refereed, international journal published bi-monthly and distributed to subscribers in over 50 countries. In 2012, we printed 84 articles (672 pages). Papers were submitted by authors from 45 countries, in the categories of Clinical Research, Laboratory Research, Clinical Techniques/Case Presentations and Invited Papers, as well as Editorials and Abstracts. One of the strong points of our journal is that our current publication time for accepted manuscripts is 4 to 6 months from the date of submission. Clinical Techniques/Case Presentations have a very quick turnaround time, which allows for very rapid publication of clinical based concepts. We also provide color for those papers that would benefit from its use. The journal does not accept any advertising but you will find postings for faculty positions. Additionally, the journal also does not rent, sell or otherwise allow its subscriber list to be used by any other entity