Effects of UV Postcuring Times on the Color Stability, Surface Properties and Conversion of 3D-printed Temporary Resin Composites.

IF 1.4 4区医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE Operative dentistry Pub Date : 2024-09-01 DOI:10.2341/24-004-L

L C de Sousa, Alc Pereira, Mrs Curinga, Bbtlc de Souza, Aud Batista, Bcd Borges, Afp Carreiro

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Abstract

Objective: To evaluate the effects of UV postcuring times on color stability (CS), surface properties (wettability [°] and surface roughness [Ra]), and conversion of 3D-printed resins for temporary restorations.

Methods: Disc-shaped specimens (10.0×3.0 mm) and maxillary central incisors (8.2×10.3 mm) were fabricated using provisional 3D-printed resin (PriZma Bio Prov [PZ] and PrintaX AA TEMP [PX]) in A2 shade and subjected to UV postcure times of 0 (T0), 5 (T1), 10 (T2), and 15 (T3) minutes (n=15). The incisors were used for CS evaluation with a colorimeter. In contrast, discs were used to measure the contact angle using the sessile drop method, surface roughness with an optical profilometer, and degree of conversion with FT-NIR. For CS, Ra, contact angle, and degree of conversion, a two-way ANOVA with Bonferroni post-hoc test (α=0.05) was used.

Results: PX resin demonstrated greater color stability than PZ (p=0.001). Long UV postcuring times (10 to 15 minutes) will increase the contact angle (p=0.013) and stabilize the degree of conversion (p=0.01), while 5 to 10 minutes of UV postcuring will provide better surface smoothness (p=0.04) of both resins.

Conclusions: Long UV postcuring times (10 to 15 minutes) lead to greater alterations in color, contact angle, and stability of the degree of conversion, while 5 to 10 minutes lead to a smoother surface of the 3D-printed temporary resins.

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紫外线后固化时间对 3D 打印临时树脂复合材料颜色稳定性、表面特性和转化率的影响。

目的评估紫外线后固化时间对颜色稳定性（CS）、表面特性（润湿性[°]和表面粗糙度[Ra]）以及用于临时修复的三维打印树脂的转化率的影响：使用 A2 色的临时 3D 打印树脂（PriZma Bio Prov [PZ] 和 PrintaX AA TEMP [PX]）制作盘状试样（10.0×3.0 毫米）和上颌中切牙（8.2×10.3 毫米），紫外线后固化时间分别为 0（T0）、5（T1）、10（T2）和 15（T3）分钟（n=15）。使用色度计对门牙进行 CS 评估。而圆盘则用无柄液滴法测量接触角，用光学轮廓仪测量表面粗糙度，用傅立叶变换近红外光谱法测量转换度。对 CS、Ra、接触角和转化率进行了双向方差分析，并进行了 Bonferroni 事后检验（α=0.05）：结果：PX 树脂的颜色稳定性高于 PZ（p=0.001）。紫外线后固化时间长（10 至 15 分钟）会增加接触角（p=0.013）并稳定转化率（p=0.01），而紫外线后固化 5 至 10 分钟会使两种树脂的表面光滑度更好（p=0.04）：结论：紫外线后固化时间过长（10 至 15 分钟）会导致颜色、接触角和转化率稳定性发生较大变化，而 5 至 10 分钟则会使 3D 打印临时树脂的表面更光滑。

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