Influence of nonhazardous postprocessing solutions and surface treatments on the surface roughness and color stability of resins used for additively manufactured definitive restorations.

IF 4.3 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE Journal of Prosthetic Dentistry Pub Date : 2025-03-22 DOI:10.1016/j.prosdent.2025.02.016

Nicolas Michel Rotter, Gabriela Panca Sabatini, Çiğdem Kahveci, Hyung-In Yoon, Manrique Fonseca, Faris Z Jamjoom, Burak Yilmaz, Gülce Çakmak

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Abstract

Statement of problem: Knowledge of the surface roughness and color stability of definitively intended additively manufactured (AM) resins when different postprocessing cleaning solutions and surface treatments are applied is limited.

Purpose: The purpose of this in vitro study was to evaluate the effect of postprocessing cleaning solution and surface treatment (polishing and coffee thermocycling) on the surface roughness and color stability of resins intended for AM definitive restorations. In addition, the color coordinates were compared with an A1 shade tab.

Material and methods: Sixty specimens were AM from 2 different resins, a glass-filler reinforced composite resin (AM-CR) and urethane acrylate-based resin (AM-UA), for definitive restorations. The specimens were divided into 3 groups based on the postprocessing cleaning solution (n=10): 96% ethanol, water-based solvent, and methyl ether solvent. The surface roughness (Ra) and color coordinates were measured before polishing, after polishing, and after coffee thermocycling for 5000 cycles. Color difference values (ΔE₀₀) were calculated, and color coordinates were compared with a reference shade tab (α=.05).

Results: AM-CR had a lower R_a with ethanol than methyl ether solvent before polishing (P=.006). AM-UA had the lowest R_a with ethanol and the highest R_a with water-based solvent before polishing (P≤.001). Irrespective of material and postprocessing solution, R_a decreased after polishing (P≤.001). AM-CR had the highest ΔE₀₀ with methyl ether solvent after polishing and after coffee thermocycling (P≤.002). AM-CR had the lowest ΔE₀₀ with ethanol after coffee thermocycling (P≤.003).

Conclusions: Resin type, postprocessing cleaning solution, and surface treatment affected the surface roughness and color stability of AM resins intended for definitive restorations.

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目的：本体外研究的目的是评估后处理清洁液和表面处理（抛光和咖啡热循环）对用于AM最终修复体的树脂的表面粗糙度和颜色稳定性的影响。此外，还将颜色坐标与 A1 色度表进行了比较：用两种不同的树脂（一种是玻璃填料增强复合树脂（AM-CR），另一种是聚氨酯丙烯酸酯基树脂（AM-UA））制作了 60 个用于最终修复的 AM 试样。根据后处理清洁溶液将试样分为 3 组（n=10）：96%乙醇、水基溶剂和甲醚溶剂。分别在抛光前、抛光后和咖啡热循环 5000 次后测量表面粗糙度（Ra）和色坐标。计算色差值（ΔE00），并将色坐标与参考色调表（α=.05）进行比较：抛光前，AM-CR 在乙醇溶剂中的 Ra 值低于甲醚溶剂（P=.006）。AM-UA 在抛光前使用乙醇的 Ra 值最低，而使用水基溶剂的 Ra 值最高（P≤.001）。无论材料和后处理溶液如何，抛光后 Ra 都会下降（P≤.001）。抛光后和咖啡热循环后，AM-CR 在甲醚溶剂中的ΔE00 最高（P≤.002）。在咖啡热循环后，AM-CR 与乙醇的ΔE00 最低（P≤.003）：树脂类型、后处理清洁溶液和表面处理会影响用于最终修复体的 AM 树脂的表面粗糙度和颜色稳定性。

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

Journal of Prosthetic Dentistry 医学-牙科与口腔外科

CiteScore

7.00

自引率

13.00%

发文量

599

审稿时长

69 days

期刊介绍： The Journal of Prosthetic Dentistry is the leading professional journal devoted exclusively to prosthetic and restorative dentistry. The Journal is the official publication for 24 leading U.S. international prosthodontic organizations. The monthly publication features timely, original peer-reviewed articles on the newest techniques, dental materials, and research findings. The Journal serves prosthodontists and dentists in advanced practice, and features color photos that illustrate many step-by-step procedures. The Journal of Prosthetic Dentistry is included in Index Medicus and CINAHL.