Color stability of bleached tooth enamel brushed with different stain-removing toothpastes
Rintaro Sugai1, Mikihiro Kobayashi1, Yuiko Niizuma1
1Department of Conservative Dentistry, Division of Aesthetic Dentistry and Clinical Cariology, Showa University School of Dentistry, Tokyo, Japan.
Summary
An experimental toothpaste stabilized bleached tooth color without increasing enamel roughness. This toothpaste, containing sodium polyphosphate, effectively removed stains, unlike others that increased roughness.
Area of Science:
- Dental Materials Science
- Tooth Whitening and Color Stability
- Surface Analysis of Dental Enamel
Background:
- In-office bleaching can alter tooth color and surface properties.
- Toothpastes are commonly used post-bleaching, potentially affecting color stability and enamel integrity.
- Understanding toothpaste composition's impact on bleached teeth is crucial for maintaining aesthetic outcomes.
Purpose of the Study:
- To evaluate the effects of four different toothpastes on the color stability of in-office bleached human teeth.
- To assess the impact of these toothpastes on enamel surface roughness.
Main Methods:
- Four toothpastes (one experimental, three commercial) were tested on bleached human incisors over 30 days.
- Color change (ΔE*ab, ΔE00, ΔWID) and enamel surface roughness (Ra) were measured.
- Scanning electron microscopy analyzed enamel and toothpaste surfaces.
Main Results:
- The experimental toothpaste (EXP) and two commercial brands (OPW, CDW) showed significantly lower color change than AWP.
- OPW caused the largest whitening effect (ΔWID).
- OPW and CDW significantly increased enamel roughness; AWP and EXP showed minimal increases.
Conclusions:
- The experimental toothpaste effectively stabilized bleached tooth color without increasing enamel surface roughness.
- Sodium polyphosphate, particularly with a high degree of polymerization, aids stain removal and color stability.
- Toothpaste abrasives and chemical components significantly influence color stability and enamel surface integrity.
Related Concept Videos
01:03Fixation and Sectioning
4.4K
Two basic types of preparation are used to visualize specimens with a light microscope: wet mounts and fixed specimens.
The simplest type of preparation is the wet mount, in which the specimen is placed in a drop of liquid on the slide. A liquid specimen can be directly deposited on the slide using a dropper. Solid specimens, such as skin scraping, can be placed on the slide before adding a drop of liquid to prepare the wet mount. Sometimes the liquid is simply water, but stains are often added...
The simplest type of preparation is the wet mount, in which the specimen is placed in a drop of liquid on the slide. A liquid specimen can be directly deposited on the slide using a dropper. Solid specimens, such as skin scraping, can be placed on the slide before adding a drop of liquid to prepare the wet mount. Sometimes the liquid is simply water, but stains are often added...
4.4K
01:26Differential Staining Technique
47
Differential staining is an essential microbiological technique that exploits variations in cell wall structures to classify and identify microorganisms. It facilitates the distinction of bacteria, aiding in diagnostic and research applications. Two of the most widely used differential staining methods are Gram staining and acid-fast staining, both of which rely on the chemical and structural differences in bacterial cell walls.Gram Staining TechniqueGram staining differentiates bacteria by...
47
01:21Tooth Anatomy
503
The human tooth enables us to eat a variety of foods, speak clearly, and even aid in shaping our faces. Teeth are composed of various elements that work together. Here's a detailed look at the anatomy of a human tooth.
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or...
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or...
503
01:18Titration of Polyprotic Base with a Strong Acid
809
The titration of a polyprotic base such as sodium carbonate with a strong acid such as hydrochloric acid results in two equivalence points on the titration curve. At the first equivalence point, the carbonate ions in the base are completely converted to bicarbonate ions. The second equivalence point corresponds to the complete conversion of bicarbonate ions to carbonic acid, which dissociates into carbon dioxide and water. The region before the first equivalence point corresponds to the...
809
01:13Special Staining Techniques
32
Specialized staining techniques play a vital role in microbiology by enabling the visualization of specific bacterial structures that remain undetectable with standard microscopy methods. These techniques not only enhance the structural visualization of bacterial cells but also provide critical insights into their pathogenicity and classification. Additionally, they support diagnostic and research endeavors in microbiology by identifying key bacterial features.Capsule Staining for Virulence...
32