Optical Properties and Color Stability of Denture Teeth—A Systematic Review

Abstract

Purpose: To systematically review past studies to determine the effect of various solutions on the color of denture teeth, thus answering the question in regards to which type of denture teeth has the best optical properties after exposure to various solutions. The method of measuring the color of artificial teeth was also evaluated as a secondary outcome. Materials and Methods:A search of studies that quantitatively investigated the influence of immersion solutions on the color change of denture teeth was conducted. Ovid MEDLINE, PubMed and Scopus databases were searched from 1997 to April 2021. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines were used during article selection. Data regarding the effect of immersion solutions, accelerated aging and surface treatments on color change were gathered. Methodologies used to assess optical properties were also summarized and compared. The modified CONSORT checklist was used to determine the risk of bias of past studied included in this review. Results: One hundred thirty-three studies were identified after removing duplicates. Forty-one studies were selected for full-text analysis, and 35 remaining papers met the inclusion criteria and were therefore included in this systematic review. Thirtytwo in vitro studies and 3 in vivo studies were included in the review. All studies reported that immersion in various solutions has a significant influence on the change in color and optical properties of denture teeth. However, the discoloration of denture teeth is still clinically acceptable in most studies. Exposure to various solutions also affected the translucency parameter of denture teeth. Most studies also investigated the surface roughness and hardness along with the optical properties, and reported that immersion cycles did not cause changes in surface roughness of denture teeth, while hardness was affected. The optical properties of PMMA denture teeth have been studied extensively, whereas that of CAD/CAM and 3D printed denture teeth is limited. Conclusions: Color stability of CAD/CAM milled denture teeth is comparable to conventional PMMA denture teeth. There are contradictory findings in terms of color stability of 3D printed denture teeth as compared to conventional PMMA denture teeth. Staining by coffee is worst among the common beverages and solutions investigated. Denture teeth can show color changes after immersion in staining beverages as early as one week. The degree of discoloration of denture teeth after immersion is time dependent, with the larger extent in the initial phase.

Assessment of Zinc-Bound Phosphate-Based Glass-Coated Denture-Relining Material with Antifungal Efficacy for Inhibiting Denture Stomatitis

“…Color changes can be assessed using a visual method or a colorimeter [ 33 ]. Observing discoloration with the naked eye has the disadvantage that the subjectivity of the inspector cannot be excluded, so using a colorimeter is the preferred method [ 34 ]. The means and standard deviations of the color differences for each group are shown in Figure 3 .…”

Effect of electronic cigarettes smoking on color stability of lithium disilicate glass ceramic veneers

“…6 Both external stains brought on by food and drink as well as intrinsic factors like the chemical make-up of the substance can have an impact on the color and surface roughness of the resin. [24][25][26] All lithium disilicate glass-ceramic veneer specimens, on the other hand, showed a modest color change after exposure to different e-liquid formulations, which was regarded as clinically acceptable. The color difference (ΔΕ) values >0.4 may be perceivable by a trained human observer and clinically unacceptable.…”

Effect of artificial aging on mechanical and physical properties of CAD-CAM PMMA resins for occlusal splints

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