Optical coherence tomography for debonding evaluation: An in-vitro qualitative study

Objective: This article aimed to evaluate in vitro the efficiency of Pro Seal fluoride sealant application in the prevention of white spot lesions around orthodontic brackets. Material and Methods: Brackets were bonded to the buccal surface of bovine incisors, and five groups were formed (n = 15) according to the exposure of teeth to oral hygiene substances and the application of enamel sealant: G1 (control), only brushing was performed with 1.450 ppm fluoride; G2 (control) brushing associated with the use of mouthwash with 225 ppm fluoride; G3, only Pro Seal sealant application was performed with 1.000 ppm fluoride; G4 Pro Seal associated with brushing; G5 Pro Seal associated with brushing and mouthwash. Experimental groups alternated between pH cycling and the procedures described. All specimens were kept at a temperature of 37 °C throughout the entire experiment. Both brushing and immersion in solutions were performed within a time interval of one minute, followed by washing in deionized water three times a day for 28 days. Afterwards, an evaluation by Optical Coherence Tomography (OCT) of the spectral type was performed. In each group, a scanning exam of the white spot lesion area (around the sites where brackets were bonded) and depth measurement of carious lesions were performed. Analysis of variance (ANOVA) was applied to determine whether there were significant differences among groups. For post hoc analysis, Tukey test was used. Results: There was statistically significant difference between groups 1 and 2 (p = 0.003), 1 and 3 (p = 0.008), 1 and 4 (p = 0.000) and 1 and 5 (p = 0.000). The group in which only brushing was performed (Group 1) showed deeper enamel lesion. Conclusion: Pro Seal sealant alone or combined with brushing and/or brushing and the use of a mouthwash with fluoride was more effective in protecting enamel, in comparison to brushing alone.

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“…At present, it is widely used in Medicine; however, there have been a few studies conducted in Dentistry. 12 …”

Section: Discussionmentioning

confidence: 99%

“…Thus, volumetric images (3D images) in transverse cuts (2D images) were produced from a scanning exam of the white spot area located around brackets. 12 …”

Section: Methodsmentioning

confidence: 99%

Effectiveness of fluoride sealant in the prevention of carious lesions around orthodontic brackets: an OCT evaluation

Pithon

Santos

Souza

et al. 2015

Dental Press J. Orthod.

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“…Table 6 collects the articles [ 45 , 65 , 66 , 166 – 180 ] about OCT in periodontology and diagnostics of oral tissues and implantology. The articles about diagnostics in orthodontics are presented in Table 7 [ 181 – 188 ]. Table 8 is collecting the other review articles that can be useful in extending the knowledge about OCT in dentistry.…”

Section: The Short History Of Oct In Dentistrymentioning

confidence: 99%

The Use of Optical Coherence Tomography in Dental Diagnostics: A State-of-the-Art Review

Machoy

Seeliger

Szyszka-Sommerfeld

et al. 2017

Journal of Healthcare Engineering

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Optical coherence tomography provides sections of tissues in a noncontact and noninvasive manner. The device measures the time delay and intensity of the light scattered or reflected from biological tissues, which results in tomographic imaging of their internal structure. This is achieved by scanning tissues at a resolution ranging from 1 to 15 μm. OCT enables real-time in situ imaging of tissues without the need for biopsy, histological procedures, or the use of X-rays, so it can be used in many fields of medicine. Its properties are not only particularly used in ophthalmology, in the diagnosis of all layers of the retina, but also increasingly in cardiology, gastroenterology, pulmonology, oncology, and dermatology. The basic properties of OCT, that is, noninvasiveness and low wattage of the used light, have also been appreciated in analytical technology by conservators, who use it to identify the quality and age of paintings, ceramics, or glass. Recently, the OCT technique of visualization is being tested in different fields of dentistry, which is depicted in the article.

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“…In previous OCT studies, different wavelengths, such as 800 nm 22 , 830-1280 nm 7 , 930 nm 18 , 23 , 1260-1360 nm 11 , 15 , 1310 nm 19 , 30 , and 1319 nm 21 , have been used. The studies, which have used 1260 nm and more wavelength source with spatial resolutions of 10 µm, have evaluated the resin-dentin interface of the cavity floor, defects of the composites, and internal adaptation or sealing performance of the resin cements.…”

Section: Discussionmentioning

confidence: 99%

“…Since the imaging depth of OCT system used in this study is 1.7 mm, the internal adaptation of inlays could not be detected due to the 4 mm cavity depth. Similar to the studies that have used 930 nm, the measurement locations were on the surface of the tooth 18 , not on inner surfaces, and marginal analysis 23 was performed. According to the results of this study, the null hypothesis 1 was rejected because direct inlay technique used in this study seems to have clinically acceptable marginal discrepancy value than indirect one.…”

Section: Discussionmentioning

confidence: 99%

Comparison of the marginal adaptation of direct and indirect composite inlay restorations with optical coherence tomography

et al. 2016

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Objective The purpose of the study was to use the photonic imaging modality of optical coherence tomography (OCT) to compare the marginal adaptation of composite inlays fabricated by direct and indirect techniques.Material and Methods Class II cavities were prepared on 34 extracted human molar teeth. The cavities were randomly divided into two groups according to the inlay fabrication technique. The first group was directly restored on cavities with a composite (Esthet X HD, Dentsply, Germany) after isolating. The second group was indirectly restored with the same composite material. Marginal adaptations were scanned before cementation with an invisible infrared light beam of OCT (Thorlabs), allowing measurement in 200 µm intervals. Restorations were cemented with a self-adhesive cement resin (SmartCem2, Dentsply), and then marginal adaptations were again measured with OCT. Mean values were statistically compared by using independent-samples t-test and paired samples t-test (p<0.05), before and after cementation.Results Direct inlays presented statistically smaller marginal discrepancy values than indirect inlays, before (p=0.00001442) and after (p=0.00001466) cementation. Marginal discrepancy values were increased for all restorations after cementation (p=0.00008839, p=0.000000952 for direct and indirect inlays, respectively). The mean marginal discrepancy value of the direct group increased from 56.88±20.04 µm to 91.88±31.7 µm, whereas the indirect group increased from 107.54±35.63 µm to 170.29±54.83 µm. Different techniques are available to detect marginal adaptation of restorations, but the OCT system can give quantitative information about resin cement thickness and its interaction between tooth and restoration in a nondestructive manner.Conclusions Direct inlays presented smaller marginal discrepancy than indirect inlays. The marginal discrepancy values were increased for all restorations that refer to cement thickness after cementation.

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Optical coherence tomography for debonding evaluation: An in-vitro qualitative study

Cited by 13 publications

References 37 publications

Effectiveness of fluoride sealant in the prevention of carious lesions around orthodontic brackets: an OCT evaluation

Effectiveness of fluoride sealant in the prevention of carious lesions around orthodontic brackets: an OCT evaluation

The Use of Optical Coherence Tomography in Dental Diagnostics: A State-of-the-Art Review

Comparison of the marginal adaptation of direct and indirect composite inlay restorations with optical coherence tomography

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