New Trends in Dental Biomechanics with Photonics Technologies

Carvalho, Lídia; Roriz, Paulo; Simões, J. A.; Frazão, Orlando

doi:10.3390/app5041350

Cited by 14 publications

(7 citation statements)

References 137 publications

(148 reference statements)

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“…Such an approach can impact the practice of the X-ray imaging, widely used by medical doctors to provide suitable treatments and monitor the evolution and outcomes of patients. We also hope that this study will contribute to more acceptance of OCT in common dental practice [ 29 , 30 , 31 , 32 , 33 ], particularly as OCT is a technology already used on a daily basis in ophthalmology [ 34 ], dermatology [ 35 ], and endoscopy [ 36 ].…”

Section: Introductionmentioning

confidence: 99%

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

Erdelyi

Duma

Sinescu

et al. 2021

Sensors

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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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Section: Introductionmentioning

confidence: 99%

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

Erdelyi

Duma

Sinescu

et al. 2021

Sensors

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“…Therefore, the results are very objective [27], as it is not a computer simulation. Moreover, the digital photoelastic method, which we used in this study, makes it possible to measure the detailed stress distributions, including tensile stress and compressive stress, which were impossible to determine using the conventional analog photoelastic method [17]. As future topics, analysis with the 3D digital photoelastic method [28] and 3DFEM method, as well as clinical verification or vice versa, are necessary to further verify the results of this and any other models that will ultimately aid clinicians.…”

Section: Digital Photoelastic Methodsmentioning

confidence: 99%

“…Each has advantages and disadvantages. [17,18] The photoelastic method has the advantage of more closely replicating clinical settings (it is a physical model). However, it is a type of qualitative analysis in contrast to FEM (virtual/theoretical model), which provides quantitative data.…”

Section: Introductionmentioning

confidence: 99%

Digital Photoelastic Analysis of TAD-Supported Maxillary Arch Distalization

2022

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The objective of this study was to determine whether the distribution of compressional and tensional stress around tooth roots is influenced by the position of a temporary anchorage device and the length of the retraction hook during the distalization of the maxillary dentition. A photoelastic orthodontic model was made of photoelastic epoxy resin. Six combinations of three retraction hook lengths and two posterior Temporary skeletal anchorage devices (TAD) positions were established. Stress was applied through an elastic chain for each of the combinations. Digital photoelastic stress analysis measured the compression, tensional stress, and direction around the tooth root. Using this novel photoelastic model, we found that the distribution of compressional and tensional stress during the retraction of the maxillary dentition was significantly influenced by the position of the TAD and the length of the retraction hook.

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“…Loading (P) of 3.5 N is applied and the prototype has a diameter (d) of 9 cm, which results in: (2) This parameter will be used to calculate the stresses in each point of the model. In order to calculate maximum stress in each model, the color pattern is considered in 2 ways: normal view and oblique view.…”

Section: Methodsmentioning

confidence: 99%

Comparison of finite element results with photoelastic stress analysis around dental implants with different threads

Geramizadeh¹,

Katoozian²,

Amid³

et al. 2018

Dent. Med. Probl.

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New Trends in Dental Biomechanics with Photonics Technologies

Abstract: Engineering techniques used to evaluate strain-stress fields, materials' mechanical properties, and load transfer mechanisms, among others, are useful tools in the study of biomechanical applications. These engineering tools,

Cited by 14 publications

References 137 publications

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

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

Digital Photoelastic Analysis of TAD-Supported Maxillary Arch Distalization

Comparison of finite element results with photoelastic stress analysis around dental implants with different threads

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