Alex Angela, Venkatesh Vijay
Conservative Dentistry and Endodontics, SRM Kattankulathur Dental College and Hospital, Chennai, IND.
Cureus. 2024 Jul 25;16(7):e65396. doi: 10.7759/cureus.65396. eCollection 2024 Jul.
Introduction Composite resin materials are a popular choice for direct tooth-colored restorative purposes due to their excellent aesthetic qualities and versatility. The key determinants that impact the visual aspect of the restoration are gloss, surface roughness, and color stability. Research indicates that there is a direct correlation between the level of roughness on a composite resin surface and the likelihood of discoloration. The aim of this study was to compare and evaluate the surface roughness and color stability of a single-shade and multi-shade composite resin after subjecting it to toothbrush simulation and immersion in coffee and an aerated drink. Materials and methods Ten single-shade composite resins and 10 multi-shade composite resins were packed into a Teflon mold and light cured. Pre-operative surface roughness values were evaluated using a surface profilometer. Toothbrush abrasion was simulated using a toothbrushing simulator. All these resin molds were then evaluated for initial color using a spectrophotometer machine (Konica Minolta, Japan). Five resin molds were then immersed in a beaker containing coffee for seven days and five resin molds were immersed into a beaker containing an aerated drink for seven days. Following this, the resin molds were re-evaluated for color stability using a spectrophotometer machine. Results The results of this study show that single-shade composite showed increased discoloration when compared with multi-shade composite resin. Also, there is a statistical difference between the single-shade composite and multi-shade composite when it comes to surface roughness and discoloration. Conclusion With the limitations of the present study, it can be concluded that single-shade composite resins have more discoloration potential in beverages than multi-shade composite resins.
引言 复合树脂材料因其出色的美学品质和多功能性，是直接牙齿颜色修复的常用选择。影响修复体视觉效果的关键因素是光泽度、表面粗糙度和颜色稳定性。研究表明，复合树脂表面的粗糙度水平与变色可能性之间存在直接关联。本研究的目的是比较和评估单色调和多色调复合树脂在经过牙刷模拟以及浸泡在咖啡和充气饮料中后的表面粗糙度和颜色稳定性。
材料与方法 将10种单色调复合树脂和10种多色调复合树脂装入特氟龙模具中并光固化。使用表面轮廓仪评估术前表面粗糙度值。使用牙刷模拟器模拟牙刷磨损。然后使用分光光度计（日本柯尼卡美能达）对所有这些树脂模具的初始颜色进行评估。接着，将5个树脂模具浸泡在装有咖啡的烧杯中7天，将5个树脂模具浸泡在装有充气饮料的烧杯中7天。之后，使用分光光度计对树脂模具的颜色稳定性进行重新评估。
结果 本研究结果表明，与多色调复合树脂相比，单色调复合树脂变色更明显。此外，在表面粗糙度和变色方面，单色调复合树脂和多色调复合树脂之间存在统计学差异。
结论 鉴于本研究存在的局限性，可以得出结论，在饮料中，单色调复合树脂比多色调复合树脂具有更大的变色潜力。
