1999
DOI: 10.1159/000016570
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Application of Magnetic Resonance Microimaging to the Study of Dental Caries

Abstract: Magnetic resonance microimaging (MRM) of teeth has continued to be developed. Two ways in which data can be presented have been investigated, 112–μm–thick image slices and pseudo–three–dimensional surface rendered images. Limitations of the latter have been demonstrated; the possible absence of structures having low intensity or incompleteness of the image at regions from which the signal intensity is low. This has implications for the MRM investigation of dental caries. However, all intensities are recorded a… Show more

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Cited by 17 publications
(10 citation statements)
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“…In the literature, two different explanations of the signal increase from carious lesions in proton MRI can be found. One group of authors studying a decayed extracted tooth attributed the rise in signal to the T 2 increase of the liquid contained in dentin tubules caused by the porous structure of the affected dentin [26]. Another group [27] explained the signal increase by penetration of the contrast medium into the porous demineralized tooth substance and resulting increase in proton density.…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…In the literature, two different explanations of the signal increase from carious lesions in proton MRI can be found. One group of authors studying a decayed extracted tooth attributed the rise in signal to the T 2 increase of the liquid contained in dentin tubules caused by the porous structure of the affected dentin [26]. Another group [27] explained the signal increase by penetration of the contrast medium into the porous demineralized tooth substance and resulting increase in proton density.…”
Section: Discussionmentioning
confidence: 99%
“…This indirect method of imaging teeth has allowed utilization of conventional imaging techniques such as spin echo pulse sequences. In this way, the surface of extracted teeth encapsulated in an MRI-visible silicon-based putty, as well as extensive carious lesions could be visualized ex vivo [26]. Three-dimensional datasets with a medium resolution of 112 µm 3 were acquired within 18 h on a 7.1 T system.…”
Section: Introductionmentioning
confidence: 99%
“…As an alternative to the direct visualization, indirect methods in which the teeth are embedded in a dedicated signal providing material have been investigated (28–31). Since direct visualization of the short T2 tissues was not required, conventional (multi) spin echo techniques were applied.…”
Section: Introductionmentioning
confidence: 99%
“…Since direct visualization of the short T2 tissues was not required, conventional (multi) spin echo techniques were applied. In vitro (28–30) as well as in vivo (31, 32) evaluation could prove a substantial signal enhancement of the carious lesions, which was attributed to protons penetrating into the lesion through the porous demineralized tooth substance. Some signal enhancement visible even from occult caries without breakdown of the enamel layer was attributed to the increased liquid content likely resulting from the production of acid or caused by saliva penetrating into the lesion through the porous demineralized enamel layer.…”
Section: Introductionmentioning
confidence: 99%
“…However, other dental diagnostic tasks can be accomplished using the developed coil, for example, visualization of the tooth pulp or detection of tooth lesions such as caries (13). Thus, the developed coil can solve the essential problem reported in (14)(15)(16), where the lack of dedicated hardware hindered the in vivo application of dental MRI. An intraoral RF receiver coil can also be used to improve in vivo application of the SWeep Imaging with Fourier Transform (SWIFT) technique to direct imaging of enamel and dentin (17).…”
Section: Discussionmentioning
confidence: 99%