MRI in Dentistry- A Future Towards  Radiation Free Imaging – Systematic  Review

Niraj, Lav Kumar

doi:10.7860/jcdr/2016/19435.8658

Cited by 38 publications

(33 citation statements)

References 26 publications

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“…By using ultrashort TE MRI it is possible to obtain information about the status of a bone pathological condition. Moreover, MRI is considered a very promising screening tool in dentistry not only because of the lack of radiation, but also because of the simultaneous multiplanar imaging of soft and hard tissues as well as the ability to detect demineralization and dental caries [116].…”

Section: Resultsmentioning

confidence: 99%

Magnetic Resonance Imaging of Hard Tissues and Hard Tissue Engineered Bio-substitutes

et al. 2019

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Magnetic resonance imaging (MRI) is a non-invasive diagnostic imaging tool based on the detection of protons into the tissues. This imaging technique is remarkable because of high spatial resolution, strong soft tissue contrast and specificity, and good depth penetration. However, MR imaging of hard tissues, such as bone and teeth, remains challenging due to low proton content in such tissues as well as to very short transverse relaxation times (T 2). To overcome these issues, new MRI techniques, such as sweep imaging with Fourier transformation (SWIFT), ultrashort echo time (UTE) imaging, and zero echo time (ZTE) imaging, have been developed for hard tissues imaging with promising results reported. Within this article, MRI techniques developed for the detection of hard tissues, such as bone and dental tissues, have been reviewed. The main goal was thus to give a comprehensive overview on the corresponding (pre-) clinical applications and on the potential future directions with such techniques applied. In addition, a section dedicated to MR imaging of novel biomaterials developed for hard tissue applications was given as well.

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Section: Resultsmentioning

confidence: 99%

Magnetic Resonance Imaging of Hard Tissues and Hard Tissue Engineered Bio-substitutes

et al. 2019

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“…MRI examinations are commonly requested in dentistry for the evaluation of soft tissue components of the temporomandibular joint and should precede cone-beam CT for cases in which the diagnosis of soft tissue pathology is a concern [21, 22]. MRI can be employed in the diagnosis and treatment planning of implants, jaw lesions, temporomandibular joints disorder (TMD), orthodontic treatment, and endodontic treatment to obtain a better prognosis [23]. In two studies, scientists compared 2D lateral cephalometric radiographs with sagittal MRI images [24, 25].…”

Section: Introductionmentioning

confidence: 99%

Comparison of a tridimensional cephalometric analysis performed on 3T-MRI compared with CBCT: a pilot study in adults

et al. 2019

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ObjectiveSince the introduction of cone-beam computed tomography (CBCT) in dentistry, this technology has enabled distortion-free three-dimensional cephalometric analysis for orthodontic and orthognathic surgery diagnosis. However, CBCT is associated with significantly higher radiation exposure than traditional routine bidimensional examinations for orthodontic diagnosis, although low-dose protocols have markedly reduced radiation exposure over time.The objective of this preliminary feasibility study is to compare the accuracy and diagnostic capabilities of an already-validated three-dimensional cephalometric analysis on CBCT to those of an analysis on 3-T magnetic resonance imaging (3T-MRI) to assess whether the latter can deliver a comparable quality of information while avoiding radiation exposure.Materials and methodsIn order to test the feasibility of three-dimensional cephalometry on 3T-MRI, 18 subjects (4 male; 14 female) with mean age 37.8 ± SD 10.2, who had undergone both maxillofacial CBCT and maxillofacial 3T-MRI for various purposes within 1 month, were selected from the archive of the Department of Dentistry and Maxillofacial Surgery of Fondazione Ospedale Policlinico Maggiore, IRCCS, Milano, Italy.A three-dimensional cephalometric analysis composed of ten midsagittal and four bilateral landmarks and 24 measurements (11 angular, 13 linear) was performed on both scans using Mimics Research® v. 17.0 (NV, Technologielaan 15, 3001 Leuven, Belgium). Cephalometric analysis was performed twice by two independent orthodontists for each scan, and each orthodontist repeated the measurements 3 weeks later. Statistical analysis was performed with SPSS® 20.00 for Windows (IBM® Corporation, Sommers, NY, USA). A Bland-Altman test for each cephalometric value was performed to assess the agreement between the procedures. The intraclass correlation coefficient (ICC) was used to assess interobserver and intraobserver reliability. The coefficient of variation was used to evaluate precision.ResultsBoth procedures showed good reliability, with mean intraobserver ICCs of 0.977/0.971 for CBCT and 0.881/0.912 for MRI. The average interobserver ICCs were 0.965 for CBCT and 0.833 for MRI. A Bland-Altman analysis for the cephalometric tracing revealed a similar range of agreement between the two modalities; the bias range (mean ± SD) was − 0.25–0.66 mm (0.174 ± 0.31) for distances and − 0.41–0.54° (0.12 ± 0.33) for angles.ConclusionsWithin the main limitation of this pilot study, that is, the small sample, it is possible to state that cephalometric measurements on 3T-MRI seem to possess adequate reliability and repeatability and that they show satisfying agreement with values measured on CBCTs. An MRI examination does not expose patients to ionizing radiation and could provide an alternative to CBCT for three-dimensional cephalometrics in the future.

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“…MRI does not employ ionizing radiation but is the best-suited modality for imaging of intracranial and soft-tissue lesions. In addition, the equipment is costly, and the screening time is long; moreover, this imaging technique is contraindicated in claustrophobic patients, and in those with certain types of surgical clips, pacemakers, and cochlear implants ( 7 ) . Ultrasonography (US) is a new and promising diagnostic imaging modality for evaluation of head and neck lesions in lymph nodes and salivary glands, as well as facial bone fractures ( 8 ) .…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the snowing-like ultrasonographic features of intraosseous jaw pathologies

et al. 2020

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Aim of the study: Ultrasonographic examination of intraosseous jaw pathologies may reveal interesting incidental, mobile hyperechoic particles (“snowflakes”) in anechoic areas. Purpose of this study is to explain and discuss this snowing-like ultrasonographic feature of intraosseous jaw pathologies. Material and methods: This study included 113 patients admitted to our clinic for examination: 43 (38.05%) males and 70 (61.9%) females with a mean age of 34.9 ± 17.2 years (range: 6–72 years). A total of 120 intraosseous lesions were evaluated prior to surgery using ultrasonography; these included non-neoplastic, odontogenic, and non-odontogenic lesions. Results: In total, 5 (4.1%) of the 120 lesions exhibited snowing-like feature on ultrasonography, including 2 (1.6% of total) of 3 incisive canal cysts, 2 (1.6% of total) of 7 dentigerous cysts, and 1 (0.8% of total) of 19 odontogenic keratocysts. Conclusions: Snowflakes evident on ultrasonography of intraosseous jaw lesions may be specific to certain pathologies. Future studies correlating radiologic and pathologic features of intraosseous jaw lesions should focus on ultrasonographic snowing-like appearance in different types of lesions and explore why they occur.

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MRI in Dentistry- A Future Towards Radiation Free Imaging – Systematic Review

Cited by 38 publications

References 26 publications

Magnetic Resonance Imaging of Hard Tissues and Hard Tissue Engineered Bio-substitutes

Magnetic Resonance Imaging of Hard Tissues and Hard Tissue Engineered Bio-substitutes

Comparison of a tridimensional cephalometric analysis performed on 3T-MRI compared with CBCT: a pilot study in adults

Evaluation of the snowing-like ultrasonographic features of intraosseous jaw pathologies

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