Influence of surface treatment on the color stability of denture teeth

Lin, Chun-Nan ； Peng, Chiao-Yun ； Lin, Po-Yen ； Chang, Chih-Ling

《Journal of Prosthodontics and Implantology》 8卷1期 (2019/01) Pp. 1-6

https://doi.org/10.6926/JPI.201901_8(1).0001

摘要

Objective: Although various surface sealants are available and for use in chairside or laboratory polishing procedures, their effect on the color stability of denture teeth is unclear, as is the effect of denture cleansers on stain removal. The purpose of this study was to evaluate the effect of sealant agents on the color stability of denture teeth and the effect of denture cleanser on stain removal from denture teeth. Material and methods: For each type of denture tooth material (SR Vivodent, PMMA; Vitapan, reinforced-PMMA), 72 specimens were prepared. The specimens were assigned to six groups according to the surface treatment used and cleaning solution used. The surface treatments employed were (1) grinding only (control group); (2) grinding and conventional laboratory polishing; and (3) grinding, conventional laboratory polishing technique and application of surface sealant (Palaseal). After surface treatment, the specimens were immersed in coffee for 14 hours at 37°C and then were rinsed with running water and air-dried. Each surface treatment group was then divided into two subgroups according to the cleaning solution: distilled water or denture cleanser (Polident). The specimens were immersed in cleaning solution for 30 minutes and then in water for 8.5 hours. This cycle was repeated for 6 weeks. CIELab color parameters were measured using a digital spectrophotometer at baseline and after 1st and 6th weeks. Data were statistically analyzed using t-tests and 3-way analysis of variance. Results: The group of teeth to which surface sealant was applied had the lowest color stability. The group of teeth cleaned using denture cleanser had higher color stability. Conclusion: Surface sealant provides an immediate smooth and glossy surface to denture teeth but gives the surface poor color stability. The use of denture cleanser can reduce denture staining.

關鍵字

cleanser ； denture ； staining ； surface sealing agent