Homogeneity of dental curing unit beam profile and its effect on microhardness of dental composites with varying thicknesses

Ko, Hyoungseok; Kim, Dohyun; Park, Sungho

doi:10.1016/j.dental.2022.06.011

Cited by 7 publications

(2 citation statements)

References 16 publications

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“…To ensure homogeneity and minimize errors, the buccal and lingual surfaces of each isolated tooth were cut and polished using SiC sandpaper of 400 to 2000 mesh. 53 This preparation process aimed to create uniform pieces of enamel and eliminate any surface irregularities that might affect the experimental results. Subsequently, all enamel pieces were subjected to high-temperature sterilization for 30 min to eliminate any live bacteria.…”

Section: Physicochemical Characterization Of Microspherementioning

confidence: 99%

Magnetic Hydroxyapatite-Coated Iron–Chromium Microspheres for Dental Surface Polishing and Plaque Removal

Jiang,

Sun,

et al. 2024

ACS Appl. Mater. Interfaces

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This research aimed to engineer magnetic hydroxyapatitecoated iron−chromium (HAp−FeCr) microspheres to enhance dental surface polishing and plaque elimination. Utilizing a tailored sol−gel approach, the HAp−FeCr microspheres were synthesized and exhaustively characterized via scanning electron microscopy, energy-dispersive X-ray spectroscopy, ζpotential, X-ray diffractometry, and X-ray photoelectron spectroscopy methodologies. Key findings showcased that these microspheres retained their magnetic properties post-HAp coating, as evidenced by the magnetization curves. An innovative magnetic polishing system was developed, incorporating these microspheres and a 2000 rpm magnet. Comparative evaluations between traditional air-powder polishing and the proposed magnetic technique demonstrated the latter's superiority. Notably, the magnetic polishing led to a substantial reduction in dental plaque on the tooth surface, decreasing bacterial adhesion and early biofilm formation by Streptococcus gordonii and Lactobacillus acidophilus, where the most pronounced effects were observed in samples with elevated HAp content. A significant 60% reduction in dental plaque was achieved with the magnetic method relative to air-powder polishing. Furthermore, the HAp−FeCr microspheres' biocompatibility was verified through cytotoxicity tests and animal studies. In essence, the magnetic HAp−FeCr microspheres present a novel and efficient strategy for dental treatments, holding immense potential for improving oral health.

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Section: Physicochemical Characterization Of Microspherementioning

confidence: 99%

Magnetic Hydroxyapatite-Coated Iron–Chromium Microspheres for Dental Surface Polishing and Plaque Removal

Jiang,

Sun,

et al. 2024

ACS Appl. Mater. Interfaces

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“…Appropriate radiant exposure (the total energy delivered per unit area [J/cm 2 ] given by irradiance [W/ cm 2 ] × exposure time [s]) is required to adequately cure any photocurable polymer-based composite restoration. For these reasons, both the photoinitiator system [12][13][14][15][16][17][18][19][20][21][22][23][24][25] and the dental LCU [6,[26][27][28][29][30][31][32][33][34][35][36] have also been subject to much research and development, particularly with the introduction of new shorter wavelength, more efficient and faster reacting photoinitiators over the last two decades. The diversity in photoinitiator chemistry and light curing technologies has also led to guidelines for proper selection, maintenance and use of LCUs to be published [37][38][39][40].…”

Section: The Evolution Of Light Curingmentioning

confidence: 99%

The power of light – From dental materials processing to diagnostics and therapeutics

A. Hadis,

Shortall,

M. Palin

2024

BIiD

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Harnessing the power of light and its photonic energy is a powerful tool in biomedical applications. Its use ranges from biomaterials processing and fabrication of polymers to diagnostics and therapeutics. Dental light curable materials have evolved over several decades and now offer very fast (≤ 10 s) and reliable polymerization through depth (4–6 mm thick). This has been achieved by developments on two fronts: (1) chemistries with more efficient light absorption characteristics (camphorquinone [CQ], ~30 L mol-1 cm1 [ʎmax 470 nm]; monoacylphosphine oxides [MAPO], ~800 L mol-1 cm-1 [ʎmax 385 nm]; bisacylphosphine oxide [BAPO], ~1,000 L mol-1 cm-1 [ʎmax 385 nm]) as well mechanistically efficient and prolonged radical generation processes during and after light irradiation, and; (2) introducing light curing technologies (light emitting diodes [LEDs] and less common lasers) with higher powers (≤ 2 W), better spectral range using multiple diodes (short: 390–405 nm; intermediate: 410–450 nm; and long: 450–480 nm), and better spatial power distribution (i.e. homogenous irradiance). However, adequate cure of materials falls short for several reasons, including improper selection of materials and lights, limitations in the chemistry of the materials, and limitations in delivering light through depth. Photonic energy has further applications in dentistry which include transillumination for diagnostics, and therapeutic applications that include photodynamic therapy, photobiomodulation, and photodisinfection. Light interactions with materials and biological tissues are complex and it is important to understand the advantages and limitations of these interactions for successful treatment outcomes. This article highlights the advent of photonic technologies in dentistry, its applications, the advantages and limitations, and possible future developments.

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Real-time multispectral transmission of hard tooth tissues and dental composites with their heating

Zebic,

Muric,

Savic-Sevic

et al. 2023

Dental Materials

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Homogeneity of dental curing unit beam profile and its effect on microhardness of dental composites with varying thicknesses

Cited by 7 publications

References 16 publications

Magnetic Hydroxyapatite-Coated Iron–Chromium Microspheres for Dental Surface Polishing and Plaque Removal

Magnetic Hydroxyapatite-Coated Iron–Chromium Microspheres for Dental Surface Polishing and Plaque Removal

The power of light – From dental materials processing to diagnostics and therapeutics

Real-time multispectral transmission of hard tooth tissues and dental composites with their heating

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