Enamel Thickness before and after Orthodontic Treatment Analysed in Optical Coherence Tomography

Despite the continuous development of materials and techniques of adhesive bonding, the basic procedure remains relatively constant. The technique is based on three components: etching substance, adhesive system, and composite material. The use of etchants during bonding orthodontic brackets carries the risk of damage to the enamel. Therefore, the article examines the effect of the manner of enamel etching on its thickness before and after orthodontic treatment. The study was carried out in vitro on a group of 80 teeth. It was divided into two subgroups of 40 teeth each. The procedure of enamel etching was performed under laboratory conditions. In the first subgroup, the classic method of enamel etching and the fifth-generation bonding system were used. In the second subgroup, the seventh-generation (self-etching) bonding system was used. In both groups, metal orthodontic brackets were fixed and the enamel was cleaned with a cutter fixed on the micromotor after their removal. Before and after the treatment, two-dimensional optical coherence tomography scans were performed. The enamel thickness was assessed on the two-dimensional scans. The average enamel thickness in both subgroups was not statistically significant.

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Corrigendum to “Enamel Thickness before and after Orthodontic Treatment Analysed in Optical Coherence Tomography”

BioMed Research International ◽

10.1155/2020/7291314 ◽

2020 ◽

Vol 2020 ◽

pp. 1-1

Author(s):

Monika Machoy ◽

Julia Seeliger ◽

Robert Koprowski ◽

Krzysztof Safranow ◽

Tomasz Gedrange ◽

...

Keyword(s):

Optical Coherence Tomography ◽

Orthodontic Treatment ◽

Optical Coherence ◽

Enamel Thickness ◽

Before And After

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Optical coherence tomography as a non-invasive method of enamel thickness diagnosis after orthodontic treatment by 3 different types of brackets

Advances in Clinical and Experimental Medicine ◽

10.17219/acem/79974 ◽

2019 ◽

Vol 28 (2) ◽

pp. 211-218 ◽

Cited By ~ 2

Author(s):

Monika Machoy ◽

Robert Koprowski ◽

Liliana Szyszka-Sommerfeld ◽

Krzysztof Safranow ◽

Tomasz Gedrange ◽

...

Keyword(s):

Optical Coherence Tomography ◽

Orthodontic Treatment ◽

Optical Coherence ◽

Enamel Thickness ◽

Non Invasive ◽

Different Types ◽

Invasive Method

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Optical evaluation of enamel white spot lesions around orthodontic brackets using swept-source optical coherence tomography (SS-OCT): An in vitro study

Dental Materials Journal ◽

10.4012/dmj.2017-262 ◽

2019 ◽

Vol 38 (1) ◽

pp. 22-27

Author(s):

Pavethynath VELUSAMY ◽

Yasushi SHIMADA ◽

Zuisei KANNO ◽

Takashi ONO ◽

Junji TAGAMI

Keyword(s):

Optical Coherence Tomography ◽

Orthodontic Brackets ◽

White Spot ◽

Optical Coherence ◽

White Spot Lesions ◽

Swept Source

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Enamel Thickness Determination by Optical Coherence Tomography: In vitro Validation

Caries Research ◽

10.1159/000446779 ◽

2016 ◽

Vol 50 (4) ◽

pp. 400-406 ◽

Cited By ~ 15

Author(s):

Amnah Algarni ◽

Hobin Kang ◽

Daniel Fried ◽

George J. Eckert ◽

Anderson T. Hara

Keyword(s):

Optical Coherence Tomography ◽

Optical Coherence ◽

Clinical Tool ◽

High Agreement ◽

Enamel Thickness ◽

Transversal Section ◽

Imaging Tool ◽

Human Enamel ◽

Thickness Measurements

Optical coherence tomography (OCT) has been introduced in dentistry as a nondestructive diagnostic imaging tool that does not utilize ionizing radiation. This study investigated the agreement between polarization-sensitive OCT (PS-OCT), microcomputed tomography (μ-CT), and histology for enamel thickness measurements. Human enamel samples were prepared and evaluated with μ-CT and PS-OCT and then sectioned and observed via digital transversal light microscopy. For all methods, a standard transversal section (b-scan) in each sample was selected, and the enamel thickness was measured at three predetermined positions using ImageJ analysis software. The results revealed significant high agreement between all tested methods, indicating the potential of PS-OCT as a clinical tool to effectively measure enamel thickness.

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Dental optical coherence tomography: a comparison of two in vitro systems

Dentomaxillofacial Radiology ◽

10.1038/sj.dmfr.4600507 ◽

1999 ◽

Vol 29 (2) ◽

pp. 85-89 ◽

Cited By ~ 27

Author(s):

L L Otis ◽

B W Colston ◽

M J Everett ◽

H Nathel

Keyword(s):

Optical Coherence Tomography ◽

Optical Coherence ◽

In Vitro Systems

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Optimization of X-ray Investigations in Dentistry Using Optical Coherence Tomography

Sensors ◽

10.3390/s21134554 ◽

2021 ◽

Vol 21 (13) ◽

pp. 4554

Author(s):

Ralph-Alexandru Erdelyi ◽

Virgil-Florin Duma ◽

Cosmin Sinescu ◽

George Mihai Dobre ◽

Adrian Bradu ◽

...

Keyword(s):

Optical Coherence Tomography ◽

Radiation Dose ◽

Imaging Techniques ◽

Image Resolution ◽

Optical Coherence ◽

X Rays ◽

High Quality ◽

X Ray

The most common imaging technique for dental diagnoses and treatment monitoring is X-ray imaging, which evolved from the first intraoral radiographs to high-quality three-dimensional (3D) Cone Beam Computed Tomography (CBCT). Other imaging techniques have shown potential, such as Optical Coherence Tomography (OCT). We have recently reported on the boundaries of these two types of techniques, regarding. the dental fields where each one is more appropriate or where they should be both used. The aim of the present study is to explore the unique capabilities of the OCT technique to optimize X-ray units imaging (i.e., in terms of image resolution, radiation dose, or contrast). Two types of commercially available and widely used X-ray units are considered. To adjust their parameters, a protocol is developed to employ OCT images of dental conditions that are documented on high (i.e., less than 10 μm) resolution OCT images (both B-scans/cross sections and 3D reconstructions) but are hardly identified on the 200 to 75 μm resolution panoramic or CBCT radiographs. The optimized calibration of the X-ray unit includes choosing appropriate values for the anode voltage and current intensity of the X-ray tube, as well as the patient’s positioning, in order to reach the highest possible X-rays resolution at a radiation dose that is safe for the patient. The optimization protocol is developed in vitro on OCT images of extracted teeth and is further applied in vivo for each type of dental investigation. Optimized radiographic results are compared with un-optimized previously performed radiographs. Also, we show that OCT can permit a rigorous comparison between two (types of) X-ray units. In conclusion, high-quality dental images are possible using low radiation doses if an optimized protocol, developed using OCT, is applied for each type of dental investigation. Also, there are situations when the X-ray technology has drawbacks for dental diagnosis or treatment assessment. In such situations, OCT proves capable to provide qualitative images.

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Utilization potential of intraluminal optical coherence tomography for the Eustachian tube

Scientific Reports ◽

10.1038/s41598-021-85634-3 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Hayoung Byun ◽

Yeon Hoon Kim ◽

Jingchao Xing ◽

Su-Jin Shin ◽

Seung Hwan Lee ◽

...

Keyword(s):

Optical Coherence Tomography ◽

Eustachian Tube ◽

Balloon Dilatation ◽

Optical Coherence ◽

Cross Sectional ◽

Anatomical Structures ◽

Complex Anatomy ◽

Before And After ◽

Tubal Lumen ◽

Oct Image

AbstractImaging the Eustachian tube is challenging because of its complex anatomy and limited accessibility. This study fabricated a fiber-based optical coherence tomography (OCT) catheter and investigated its potential for assessing the Eustachian tube anatomy. A customized OCT system and an imaging catheter, termed the Eustachian OCT, were developed for visualizing the Eustachian tube. Three male swine cadaver heads were used to study OCT image acquisition and for subsequent histologic correlation. The imaging catheter was introduced through the nasopharyngeal opening and reached toward the middle ear. The OCT images were acquired from the superior to the nasopharyngeal opening before and after Eustachian tube balloon dilatation. The histological anatomy of the Eustachian tube was compared with corresponding OCT images, The new, Eustachian OCT catheter was successfully inserted in the tubal lumen without damage. Cross-sectional images of the tube were successfully obtained, and the margins of the anatomical structures including cartilage, mucosa lining, and fat could be successfully delineated. After balloon dilatation, the expansion of the cross-sectional area could be identified from the OCT images. Using the OCT technique to assess the Eustachian tube anatomy was shown to be feasible, and the fabricated OCT image catheter was determined to be suitable for Eustachian tube assessment.

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