Hollis Scott, Eisenbeisz Elaine, Versluis Antheunis
Assistant Professor, Department of Prosthodontics, College of Dentistry, University of Tennessee Health Science Center, Memphis, Tenn.
Owner and Principal Statistician, Omega Statistics, Murrieta, Calif.
J Prosthet Dent. 2015 Nov;114(5):709-14. doi: 10.1016/j.prosdent.2015.06.001. Epub 2015 Sep 4.
Hard denture acrylic resins must maintain color stability to remain esthetic.
The purpose of this in vitro study was to measure the color stability of denture resins subjected to staining agents and cleaned with denture cleansers
Forty-five disks (10-mm diameter, 2-mm thick) fabricated from 3 denture resins (light polymerized Eclipse; heat polymerized Lucitone 199 Heat; autopolymerized Lucitone 199 Repair) were stored for 24 hours in 37°C water. After baseline colorimetry measurement were made, the specimens were soaked for 8 hours in a staining agent: coffee, cola, or grape juice. Subsequently, the specimens were soaked for 12 hours in a commercial denture cleanser (Polident, GlaxoSmithKline; Efferdent, Prestige Brands Inc) or water (control). This procedure was repeated every 24 hours. Staining agents and cleansers were replenished every 24 hours. Color change (ΔE) was determined after 2, 4, 6, and 8 weeks (n=5). Results were submitted to analysis of variance and Tukey honest significant difference test (α=.05).
Significant interaction was found between cleansers and staining agents (P=.006), cleansers and resins (P=.034), and resins and staining agents (P<.001). For the staining agent of grape juice, water allowed more discoloration (ΔE=16.93) than Efferdent (ΔE=14.41) or Polident (ΔE=14.81); Efferdent and Polident effects were not significantly different (P=.761). The Lucitone 199 Repair resin cleaned with water discolored more (ΔE=15.24) than with Efferdent (ΔE=14.14) or Polident (mean ΔE=13.82); the difference between Polident and Efferdent was not significant (P=.566). For Eclipse, grape juice discolored more (ΔE=16.43) than coffee (ΔE=12.23; P<.001) or cola (ΔE=13.78; P=.001); coffee and cola staining were not significantly different (P=.071).
Eclipse resin stained most, especially in grape juice. Compared with water, Polident and Efferdent reduced discoloration better in Lucitone 199 Repair and grape juice stains. Nevertheless, discolorations in all 3 resins were perceivable, regardless of cleanser.
硬质义齿丙烯酸树脂必须保持颜色稳定性以维持美观。
本体外研究的目的是测量经受染色剂并使用义齿清洁剂清洁后的义齿树脂的颜色稳定性。
用3种义齿树脂（光固化Eclipse；热固化Lucitone 199 Heat；自凝Lucitone 199 Repair）制作45个圆盘（直径10毫米，厚2毫米），在37°C水中储存24小时。在进行基线比色测量后，将标本在一种染色剂中浸泡8小时：咖啡、可乐或葡萄汁。随后，将标本在市售义齿清洁剂（Polident，葛兰素史克公司；Efferdent，威望品牌公司）或水中（对照）浸泡12小时。此过程每24小时重复一次。染色剂和清洁剂每24小时补充一次。在2、4、6和8周后测定颜色变化（ΔE）（n = 5）。结果进行方差分析和Tukey诚实显著差异检验（α = 0.05）。
在清洁剂与染色剂（P = 0.006）、清洁剂与树脂（P = 0.034）以及树脂与染色剂（P < 0.001）之间发现了显著的相互作用。对于葡萄汁染色剂，水导致的变色（ΔE = 16.93）比Efferdent（ΔE = 14.41）或Polident（ΔE = 14.81）更多；Efferdent和Polident的效果无显著差异（P = 0.761）。用清水清洁的Lucitone 199 Repair树脂变色（ΔE = 15.24）比用Efferdent（ΔE = 14.14）或Polident（平均ΔE = 13.82）更多；Polident和Efferdent之间的差异不显著（P = 0.566）。对于Eclipse树脂，葡萄汁导致的变色（ΔE = 16.43）比咖啡（ΔE = 12.23；P < 0.001）或可乐（ΔE = 13.78；P = 0.001）更多；咖啡和可乐染色无显著差异（P = 0.071）。
Eclipse树脂染色最多，尤其是在葡萄汁中。与水相比，Polident和Efferdent在Lucitone 199 Repair和葡萄汁污渍中减少变色的效果更好。然而，无论使用何种清洁剂，所有3种树脂都会出现变色。
