Effect of repeated immersion solution cycles on the color stability of denture tooth acrylic resins

Abstract

ObjectiveChemical solutions have been widely used for disinfection of dentures, but their effect on color stability of denture tooth acrylic resins after repeated procedures is still unclear. The aim of this in vitro study was to evaluate whether repeated cycles of chemical disinfectants affected the color stability of two denture tooth acrylic resins. Material and MethodsSixty disc-shaped specimens (40 mm x 3 mm) were fabricated from two different brands (Artiplus and Trilux) of denture tooth acrylic resin. The specimens from each brand (n=30) were randomly divided into 6 groups (n=5) and immersed in the following solutions: distilled water (control group) and 5 disinfecting solutions (1% sodium hypochlorite, 2% sodium hypochlorite, 5.25% sodium hypochlorite, 2% glutaraldehyde, and 4% chlorhexidine gluconate). Tooth color measurements were made by spectrophotometry. Before disinfection, the initial color of each tooth was recorded. Further color measurements were determined after subjecting the specimens to 7, 21, 30, 45, 60, and 90 immersion cycles in each tested solution. Color differences (ΔE*) were determined using the CIE L*a*b* color system. Data were analyzed using two-way repeated measures analysis of variance (ANOVA) followed by Tukey tests. The significance level was set at 5%. ResultsThere were statistically significant differences in ΔE* among the 5 disinfectants and water during the 90 cycles of immersion for both denture tooth acrylic resins. Distilled water promoted the greatest color change in both denture tooth acrylic resins, nevertheless none of tested disinfectants promoted ΔE* values higher than 1.0 on these acrylic materials during the 90 cycles of disinfection. ConclusionsRepeated immersion cycles in disinfecting solutions alter ∆E* values, however these values do not compromise the color of the tested denture tooth acrylic resins because they are imperceptible to the human eye.

A Comparative Study of Heat and Self-Cured Acrylic Resins on Color Stability of 5 Brands of Denture Teeth

“…In a 2006 study of, Ertas evaluated distilled water as causing the least discoloration, with cola, tea, and coffee respectively higher, also in line with the current study (16). In 2011, Silva et al found that denture teeth could be discolored after immersion cycling in distilled water, which may be due to the internal composition of the resin constructor of artificial teeth, the water sorption phenomenon, and micro cracks caused by this sorption (17). Discoloration of denture teeth depends on the hydrophilic nature of choromogenous solutions as well as their material properties (18).…”

Effectiveness of disinfectants on the adherence of <i>Candida albicans</i> to denture base resins with different surface textures

“…Disinfection with chemical solutions is especially mandatory for geriatric or handicapped denture wearers with compromised manual dexterity (16,17). In fact, it has been recommended as an essential procedure for prevention of cross-contamination and maintenance of a healthy oral mucosa (18).…”

Proteti̇k Di̇ş Tedavi̇si̇nde Dezenfeksi̇yon Ve Steri̇li̇zasyon

“…28 Ölçü materyallerinin kimyasal dezenfeksiyonunda spreyleme yöntemi ve solüsyonda bekletme/ daldır-ma yöntemi olmak üzere iki yöntem kullanılır. 29 Irreversible hidrokolloid ölçü materyalinde dezenfektan solüsyonda bekletildiğinde hacimsel değiĢiklik meydana gelmektedir, bu yüzden daha çok spreyleme yöntemi tercih edilmektedir. 30,31 Elastomerik ölçü materyallerinin farklı solüsyonlarda daldırma yöntemi ile dezenfekte edilmesinin minimum hacimsel değiĢikliğe sebep olduğu bildirilmiĢtir.…”

“…29 Akrilik esaslı sert bir kaide astar materyali olan Tokuyama Rebase Fast II, sodyum perborat solüsyonu (Corega Tablet) ve klorheksidinle 6 ay boyunca dezenfekte edilmiĢ, renk değiĢimleri ölçül-müĢtür. Kontrol grubu dahil tüm gruplarda dikkate değer renk değiĢimi görülmüĢtür.…”