Evaluating the Type of Light Transmittance in Mono Crystalline, Poly Crystalline and Sapphire Brackets- An Invitro Spectrofluorometer Study

Jp, Mohamed; Pb, Kommi; Ms, Kumar; Hanumanth,; Venkatesan,; Aniruddh,; Arvinth,; An, Kumar

doi:10.7860/jcdr/2016/18599.8230

Cited by 4 publications

(13 citation statements)

References 13 publications

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“…For example, the transmission within the monocrystalline sapphire brackets was higher than that that within the polycrystalline brackets and the other aesthetic brackets considered in this study. This agrees with results obtained in other studies, i.e., that the spectral transmissibility within polycrystalline brackets is low compared with the transmissibility within monocrystalline (sapphire) brackets [ 41 , 45 , 52 ]. This means that, in order to achieve ablative debonding, greater density of energy and pulse power are required from the laser [ 35 , 48 ].…”

Section: Discussionsupporting

confidence: 92%

“…It has been reported that the material from which the ceramic bracket is made, its morphological factors, and its composition can influence the penetration of direct light significantly. Polycrystalline ceramic brackets have been found to block the direct transmittance of light, whereas monocrystalline brackets have been observed to permit the passage of more light [ 41 , 43 , 45 ].…”

Section: Discussionmentioning

confidence: 99%

“…The last factor which affects the transmission values is the brand of the aesthetic bracket, i.e., how the company manufactures the brackets and the purity of the manufactured material [ 45 ]. A significant difference between Radiance and Absolute brackets has been noticed, as the transmission values of the Radiance brackets were higher than those of the Absolute brackets, though both are made of monocrystalline sapphire with the same thickness at the bracket’s wing.…”

Section: Discussionmentioning

confidence: 99%

“…Through the introduction of spectroscopy technology in dentistry, we can obtain a lot of information concerning dental structures as well as dental material, including aesthetic brackets [ 44 , 45 ]. One of these spectroscopy technologies is Fourier transform infrared (FTIR) spectroscopy, which is considered a non-destructive and label-free vibrational spectroscopic technique and is widely used in research [ 44 ].…”

Section: Introductionmentioning

confidence: 99%

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Comparative Study of Transmission of 2940 nm Wavelength in Six Different Aesthetic Orthodontic Brackets

et al. 2023

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Background: Previous studies have confirmed the superiority of using erbium lasers (2940, 2780 nm) over other lasers in the debonding of ceramic brackets due to their safety and effectiveness. The most important factor in the debonding of aesthetic brackets is the transmission of the erbium laser through the aesthetic bracket to the adhesive resin. Objective: To identify the transmission of the 2940 nm wavelength through different types of aesthetic brackets. Materials and methods: A total of 60 aesthetic brackets were divided into six equal groups (10 monocrystalline sapphire brackets—Radiance, AO; 10 monocrystalline sapphire brackets—Absolute, Star Dentech; 10 polycrystalline brackets—20/40, AO; 10 polycrystalline brackets—3M Unitek Gemini Clear Ceramic; 10 silicon brackets—Silkon Plus, AO; 10 composite brackets—Orthoflex, OrthoTech). The aesthetic brackets were mounted in a Fourier transform infrared spectrophotometer (FTIR IRPrestige-21, SHIMADZU) following the typical spectroscopy lab procedure for such samples. The transmission ratio for the 2940 nm wavelength was obtained using IRsolution software. The mean transmission values of the tested groups were compared using a one-way analysis of variance (ANOVA) test followed by a Bonferroni test (post-hoc test). Results: The highest transmission ratio was observed for the Radiance sapphire brackets (64.75%) and the lowest was observed for the 3M polycrystalline brackets (40.48%). The differences among the Aesthetic brackets were significant (p < 0.05). Conclusions: The thick polycrystalline and composite brackets have the lowest transmissibility, whereas the monocrystalline sapphire brackets have the highest transmissibility for the 2940 nm wavelength, meaning that there is a higher possibility of debonding them with a hard tissue laser through thermal ablation.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Comparative Study of Transmission of 2940 nm Wavelength in Six Different Aesthetic Orthodontic Brackets

et al. 2023

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“…Ceramic brackets are an essential part of current orthodontic practice due to their aesthetic advantage [6,7]. However, their high brittleness may disrupt their removal as a monoblock, leading to more fractures of the enamel [8,9].…”

Section: Introductionmentioning

confidence: 99%

In Vitro Evaluation of Experimental Self-Adhesive Orthodontic Composites Used to Bond Ceramic Brackets

et al. 2019

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The aim of this study was to evaluate the degree of conversion (DC), flexural strength (FS), and shear bond strength (SBS) of ceramic brackets bonded to enamel with experimental self-adhesive orthodontic composites. Functional monomers 10-methacryloyloxy-decyl-dihydrogen-phosphate (MDP) and glycerol-dimethacrylate-phosphate (GDMA-P) were used in experimental composites. They were compared to the same composite without an acidic monomer (negative control) and with enamel acid-etching prior to adhesive application (positive control). DC was evaluated by Raman micro-spectroscopy. Flexural three-point bending testing was performed in a universal testing machine. Ceramic brackets were bonded to bovine enamel and SBS was evaluated before and after 2000 thermal-cycles. Fracture patterns were surveyed with manual removal with specific pliers and analyzed by SEM. Statistics was performed using ANOVA and Tukey’s test (p < 0.05). DC of the control composite was significantly higher (p < 0.001) than that of GDMA-P and MDP. FS showed no significant difference between composites (p = 0.451). Regarding adhesion, the positive control (8.47 ± 0.88 MPa) and MDP (7.07 ± 2.69 MPa) obtained higher overall results. The predominant fracture pattern of the positive control and MDP was mixed while it was adhesive for further groups. The MDP-containing orthodontic composite attained similar adhesion to a conventional three-step orthodontic bonding system, with a similar fracture pattern and mechanical properties. Nevertheless, the presence of acidic functional monomers reduced the DC.

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The Optical Translucency, Opalescence, and Reflectance of Different As-Received Ceramic Brackets: A Spectrophotometer Study

AlBadr,

Talic

2023

Journal of Advanced Oral Research

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Aim: To determine the difference in the reflected color coordinates and to compare the translucency and opacity of different as-received ceramic brackets using a spectrophotometer. Materials and Methods: Four types of ceramic brackets were investigated in this in vitro study. A total of 72 ceramic brackets were examined using a spectrophotometer. Reflected color coordinates of the labial side of bracket were measured according to the Commission Internationale de l’Eclairage (CIE) color scale. Color difference between brackets was calculated using the equation: Δ E*ab = [(Δ L*)2 + (Δ a*)2 + (Δ b*)2] 1/2. Translucency parameter (TP) and opalescence parameter (OP) were calculated to determine translucency and opacity of the brackets, respectively. Data was collected and analyzed using IBM SPSS V25. The significance level was set at p ≤ .05. One-way ANOVA and post hoc multiple comparison tests were utilized. Results: The range for CIE L* (lightness) was 62.69 to 58.83, for a* (red–green parameter) −0.33 to −2.9 and for b* (yellow–blue parameter) −2.19 to 2.29. All these color co-ordinates were influenced by bracket brand ( p < .05). DISCREET™ showed the highest TP = 16.342 and Symetri™ Clear showed the lowest = 10.823. The OP values ranged between 1.783 and 3.781 and Symetri™ Clear showed the highest OP. Conclusion: Color coordinates, TP, and OP of esthetic brackets investigated with a spectrophotometer were significantly different and influenced by the material microstructure and/or manufacturing process.

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Evaluating the Type of Light Transmittance in Mono Crystalline, Poly Crystalline and Sapphire Brackets- An Invitro Spectrofluorometer Study

Cited by 4 publications

References 13 publications

Comparative Study of Transmission of 2940 nm Wavelength in Six Different Aesthetic Orthodontic Brackets

Comparative Study of Transmission of 2940 nm Wavelength in Six Different Aesthetic Orthodontic Brackets

In Vitro Evaluation of Experimental Self-Adhesive Orthodontic Composites Used to Bond Ceramic Brackets

The Optical Translucency, Opalescence, and Reflectance of Different As-Received Ceramic Brackets: A Spectrophotometer Study

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