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Objective: Oral care formulations aim to prevent oral diseases such as dental caries and gingivitis. Additionally, desire for white teeth still exists across all age groups. It is known that most whitening toothpastes are highly abrasive and can be harmful to teeth and gingiva. Therefore, a gel formulation with biomimetic hydroxyapatite (HAP; Ca[PO][OH]) as active ingredient was developed. This formulation was tested with respect to its tooth whitening properties in an study.
Materials And Methods: Enamel samples were allocated to either group (a) HAP gel, (b) whitening mouth rinse with phosphates, or (c) negative control (distilled water). Test products were applied by finger (a) or were rinsed (b, c) for 1, 3, and 9 (b and c only) cycles, respectively.
Results: Color changes (ΔE) were measured spectrophotometrically. Group (a) showed a significant increase in color changes with respect to whitening after one cycle (mean ΔE = 5.4 [±2.66], ≤ 0.006) and three cycles (mean ΔE = 11.2 [±3.11], < 0.0001) compared to groups (b) and (c). For group (b), a significant increase in color change was measured after three (mean ΔE = 2.77 [±1.01], = 0.02) and nine cycles (mean ΔE = 3.27 [±1.61], = 0.006) compared to (c). Group (c) showed only minor and statistically insignificant color changes.
Conclusion: This study demonstrated a significantly higher ad hoc whitening effect of the HAP gel compared to the mouth rinse and water after short-time application.
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http://dx.doi.org/10.1055/s-0040-1714759 | DOI Listing |
Materials (Basel)
December 2024
Department of Material Engineering, Faculty of Production Engineering and Materials Technology, Czestochowa University of Technology, Aleja Armii Krajowej 19, 42-200 Czestochowa, Poland.
This paper presents a method for producing VTMS/HAp/VTMS/VTMS multilayer coatings on a Grade 2 titanium substrate and characterizes their structure and functional properties. Two solutions were used to produce the coatings: one based on vinyltrimethoxysilane (VTMS) and the other on hydroxyapatite (HAp) powder. The coatings were applied using immersion using the sol-gel method.
View Article and Find Full Text PDFJ Trace Elem Med Biol
November 2024
Institute of Biomaterials, University of Erlangen-Nuremberg, Erlangen 91058, Germany. Electronic address:
Introduction: The incorporation of trace elements such as strontium (Sr) and copper (Cu) in the composition of mesoporous bioactive glass (MBG) is widely known to enhance its biological functionality for bone tissue regeneration METHODS: Two MBG powders with the composition 80SiO-11CaO-5PO-xCuO/SrO, one doped with 4 mol.% of CuO, the second with 4 mol.% of SrO were blended in the weight ratios of Cu-MBG: Sr-MBG; 100:0, 70: 30, 50: 50, 30: 70 and 0:100 aiming at minimizing Cu to minimize the cytotoxicity of Cu while preserving its antimicrobial activity.
View Article and Find Full Text PDFOdontology
November 2024
Department of Pharmaceutical Sciences, School of Pharmacy, State University of Ponta Grossa, Uvaranas, PR, Brazil.
This study assessed the hydrogen peroxide (HP) diffusion into the pulp chamber, bleaching efficacy (BE), surface roughness (Ra), and Knoop microhardness (KHN) of an experimental bleaching gel containing a hydroxyapatite-capsaicin composite (HAp-CAP). Human premolars were randomly assigned to three groups (n = 9) based on the dental bleaching gel used (50 min; one session): only 35% HP, 35% HP + HAp-CAP, and not exposed to bleaching (negative control; NC). HP diffusion (µg/mL) into the pulp chamber was assessed using UV-Vis spectrophotometry, and BE (ΔE, ΔE, and WI) was evaluated using a digital spectrophotometer.
View Article and Find Full Text PDFInt J Biol Macromol
December 2024
Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Uttarakhand 247667, India; Centre for Nanotechnology, Indian Institute of Technology Roorkee, Uttarakhand 247667, India. Electronic address:
Int J Biol Macromol
December 2024
College of Food Science and Engineering, Shandong Agricultural University, Key Laboratory of Food Processing Technology and Quality Control of Shandong Higher Education Institutes, Taian 271018, PR China.
Hawthorn is rich in pectin, which is much higher than most cultivated fruits, but conventional extraction methods do not meet the requirements of low energy consumption and green production. Pectin in hawthorn is divided into soluble and insoluble parts, and with the ripening of hawthorn, the original pectin is converted into soluble pectin and pectic acid under the action of enzymes. Therefore, based on the characteristics of hawthorn pectin, this study sequentially extracted hawthorn pectin using water-soluble pectin (WSP) and hot acid-soluble pectin (HAP) method, verifying the feasibility of extracting hawthorn pectin with pure water at room temperature, and systematically analyzing and comparing the physicochemical properties and functional characteristics of the two methods.
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