Moon Audrey, Powers John M, Kiat-Amnuay Sudarat
The University of Texas School of Dentistry at Houston, Houston, Texas, USA.
J Esthet Restor Dent. 2014 Jul-Aug;26(4):247-55. doi: 10.1111/jerd.12109. Epub 2014 Jun 30.
This study evaluated color stability of acrylic denture teeth and base resins after 48 weeks of commercial denture cleanser simulation.
Two brands of denture teeth (Trubyte Portrait IPN, TP; SR Vivodent DCL, SR) in shades A1, B1, and C1 and three acrylic base resins (Lucitone, LU; Paragon, PA; Valplast, VA) prepared to manufacturer's specifications were exposed 10 hours daily to four cleansers (Clorox Bleach, CB; Polident 3 minute, PO3; Efferdent, EF; and Kleenite, KL) and distilled water control, approximating consumer overnight use. Color measurements used the standard Commision International de l'Eclairage (International Commission on Illumination, CIE Lab*) color space (0, 4, 12, 24, 36, and 48 weeks.) Color differences (ΔE*) at 48 weeks were subjected to four-way analysis of variance (ANOVA). Mean values were compared with Fisher's (protected least significant difference) intervals (0.05 significance level).
Mean color differences (ΔE*) demonstrated color changes in each material. ANOVA-indicated color changes in teeth were significantly affected by both cleansers and teeth brand (p < 0.05), but not shade. Color changes in base resins were significantly affected by cleansers (p < 0.05), but not brand alone. Overall, KL produced the least color change while CB and PO3 produced the most for all materials.
After 48 weeks of daily simulation, TP teeth were more color stable than SR in all cleansers except EF (p < 0.0001). Base resin VA was less color stable than LU and PA. Cleanser KL resulted in the lowest color changes.
All tested materials yield clinically acceptable color changes (ΔE* < 3.5); all cleansing methods tested can be recommended, although Kleenite demonstrated the least change after 48 weeks.
本研究评估了在模拟商业义齿清洁剂使用48周后，丙烯酸义齿牙齿和基托树脂的颜色稳定性。
两种品牌的义齿牙齿（Trubyte Portrait IPN，TP；SR Vivodent DCL，SR），色号为A1、B1和C1，以及三种按照制造商规格制备的丙烯酸基托树脂（Lucitone，LU；Paragon，PA；Valplast，VA），每天暴露于四种清洁剂（高乐氏漂白剂，CB；Polident 3分钟，PO3；Efferdent，EF；和Kleenite，KL）及蒸馏水对照组中10小时，近似消费者夜间使用情况。使用标准国际照明委员会（CIE Lab*）颜色空间进行颜色测量（0、4、12、24、36和48周）。对48周时的颜色差异（ΔE*）进行四因素方差分析（ANOVA）。均值与Fisher（保护最小显著差异）区间进行比较（显著性水平为0.05）。
平均颜色差异（ΔE*）表明每种材料都有颜色变化。方差分析表明，牙齿的颜色变化受清洁剂和牙齿品牌两者的显著影响（p < 0.05），但不受色号影响。基托树脂的颜色变化受清洁剂显著影响（p < 0.05），但不受品牌单独影响。总体而言，Kleenite产生的颜色变化最小，而CB和PO3对所有材料产生的颜色变化最大。
经过48周的每日模拟后，除EF外，在所有清洁剂中TP牙齿比SR牙齿颜色更稳定（p < 0.0001）。基托树脂VA比LU和PA颜色稳定性差。清洁剂Kleenite导致的颜色变化最小。
所有测试材料产生的颜色变化在临床上均可接受（ΔE* < 3.5）；尽管Kleenite在48周后显示出最小的变化，但所有测试的清洁方法均可推荐。
