1. DDS, PhD, Department of Prosthodontics, Faculty of Dentistry, Karadeniz Technical University, Trabzon, Turkey;
Int J Med Sci. 2013 Aug 30;10(11):1503-9. doi: 10.7150/ijms.6647. eCollection 2013.
Oral rinses are widely used to promote periodontal health with provisional restorations during the interim period. The aim of this study was to compare the discoloration of provisional restoration materials with different oral rinses.
A total of 140 disc-shaped specimens (shade A2) (10 mm x 2 mm) were prepared from one PMMA-based (TemDent Classic(®)) and three different bis-acrylic-based (Protemp II(®), Luxatemp(®) and Fill-In(®)) provisional restoration materials (n=7). The color values (L*, a*, and b*) of each specimen were measured before and after exposure with a colorimeter, and the color changes (∆E) were calculated according to the CIE Lab* system. The specimens were immersed in each of the 4 oral rinses (alcohol-containing mouthwash, chlorhexidine, benzydamine HCl, benzydamine HCl and chlorhexidine) twice a day for 2 minutes. After 2 minutes of immersion in the oral rinses, the specimens were immersed in artificial saliva. The specimens were exposed to the oral rinses and the artificial saliva for 3 weeks. Two-way ANOVA, the Bonferroni test and the paired sample t-test were used for statistical analyses (p<0.05).
Comparison of the discoloration from the oral rinses after immersion for three weeks revealed no significant differences (p>0.05). The lowest color change was observed in PMMA-based Temdent in all oral rinses (p<0.05). There were no significant differences between the bis-acryl composites after immersion in saliva or the mixture of benzydamine HCl and chlorhexidine and the alcohol-containing mouthwash for 3 weeks (p>0.05). After immersion in chlorhexidine, the color change values of Protemp II and Fill-in showed significant differences (p=0.018). Protemp II also showed less discoloration than the other bis-acryl composites, and this color change was statistically significant (p <0.05). For all oral rinses, the L* value decreased while b* values increased, and this color change was found to be statistically significant (p <0.05). A* values were found to be significantly higher with oral rinses (p<0.05), except Protemp II immersed in benzydamine HCl or alcohol-containing mouthwash.
The type of the oral rinse did not affect the discoloration process. For long-term esthetic results, choosing MMA-based materials for provisional restorations appears to be more effective.
口腔冲洗在临时修复期间被广泛用于促进牙周健康。本研究的目的是比较不同口腔冲洗液对临时修复材料变色的影响。
共制备了 140 个 PMMA 基（TemDent Classic(®)）和 3 种不同双丙烯酸基（Protemp II(®)、Luxatemp(®)和 Fill-In(®)）临时修复材料的圆盘状试件（A2 色调）（10mm×2mm）（n=7）。用比色计测量每个试件在暴露前后的颜色值（L*、a和 b），并根据 CIE Lab*系统计算颜色变化（∆E）。将试件每天浸入 4 种口腔冲洗液（含酒精漱口水、洗必泰、盐酸苯佐卡因、盐酸苯佐卡因和洗必泰）中 2 分钟，每天两次。在口腔冲洗液中浸泡 2 分钟后，将试件浸入人工唾液中。将试件暴露于口腔冲洗液和人工唾液中 3 周。采用双向方差分析、Bonferroni 检验和配对样本 t 检验进行统计学分析（p<0.05）。
比较浸泡 3 周后的口腔冲洗液引起的变色，差异无统计学意义（p>0.05）。在所有口腔冲洗液中，PMMA 基 Temdent 的颜色变化最小（p<0.05）。在唾液中浸泡或混合盐酸苯佐卡因和洗必泰与含酒精漱口水浸泡 3 周后，双丙烯酸复合材料之间无显著性差异（p>0.05）。浸泡在洗必泰后，Protemp II 和 Fill-in 的颜色变化值有显著差异（p=0.018）。Protemp II 也比其他双丙烯酸复合材料的变色少，这种颜色变化具有统计学意义（p<0.05）。对于所有的口腔冲洗液，L值降低，b值升高，这种颜色变化具有统计学意义（p<0.05）。除 Protemp II 浸泡在盐酸苯佐卡因或含酒精漱口水中外，用口腔冲洗液后 A*值显著升高（p<0.05）。
口腔冲洗液的类型不影响变色过程。对于长期美学效果，选择 MMA 基材料作为临时修复体似乎更有效。
