Bone density changes around teeth during orthodontic treatment

Hsu, Jui‐Ting; Chang, Hsin-Wen; Huang, Heng‐Li; Yu, Jianxing; Li, Yufen; Tu, Ming-Gene

doi:10.1007/s00784-010-0410-1

Cited by 69 publications

(100 citation statements)

References 33 publications

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“…In these examinations, density is described in hounsfield units (HU) and represents the relative density of a body tissue according to a calibrated gray-level scale based on HU values of the air (-1000 HU), water (0 HU) and dense bone (+1000 HU) [25] . HU values are directly related to the mass absorption coefficient of different tissues [26] and, despite some variation [27] , these values may be used for the determination of density of the tissues with a high degree of accuracy [10] and sensitivity, detecting density differences of 1% or less [28] . However, the gray scale can vary between different scanners and with different energies on the same MSCT scanner [25] .…”

Section: Bone Mineral Densitymentioning

confidence: 99%

“…After the development of CBCT, a less complex device with low operational cost and reduced radiation emission [30][31][32] used for the acquisition of tridimensional images of dentomaxillofacial structures by Mozzo et al [33] , the indication of medical CT for the evaluation of these structures decreased considerably, especially due to the higher radiation dose applied to the patient during image acquisition [10,32] . Thus, CBCT has been proposed as a diagnostic method for the determination of bone mineral density [10,11,18,[34][35][36] .…”

Section: Cone Beam Ctmentioning

confidence: 99%

“…The development of cone beam computed tomography (CBCT), used for the evaluation of dentomaxillofacial structures, has allowed for more frequent use of these images in dentistry because it is a less complex device that produces images with satisfactory resolution, with little artifact incidence and lower dose of radiation [4] . Multislice and cone beam CT images are frequently used to determine mineral density of craniofacial bone structures [5][6][7][8][9][10] . Yet, there is no consensus regarding the accuracy of CBCT for this type of analysis.…”

Section: Introductionmentioning

confidence: 99%

“…Yet, there is no consensus regarding the accuracy of CBCT for this type of analysis. While some studies advocate its use [10][11][12][13][14][15] , others advocate that CBCT is not an adequate tool for this type of evaluation because the intensity values of CBCT are influenced by the characteristics of the system [4,13,16] and by the scanned object [16][17][18] . This study aims to provide a literature review concerning the reliability of CBCT for the determination of bone mineral density of craniofacial structures.…”

Section: Introductionmentioning

confidence: 99%

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Bone mineral density in cone beam computed tomography: Only a few shades of gray

Campos

Souza

Júnior

et al. 2014

WJR

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Cone beam computed tomography (CBCT) has often been used to determine the quality of craniofacial bone structures through the determination of mineral density, which is based on gray scales of the images obtained. However, there is no consensus regarding the accuracy of the determination of the gray scales in these exams. This study aims to provide a literature review concerning the reliability of CBCT to determine bone mineral density. The gray values obtained with CBCT show a linear relationship with the attenuation coefficients of the materials, Hounsfield Units values obtained with medical computed tomography, and density values from dual energy X-ray absorciometry. However, errors are expected when CBCT images are used to define the quality of the scanned structures because these images show inconsistencies and arbitrariness in the gray values, particularly when related to abrupt change in the density of the object, X-ray beam hardening effect, scattered radiation, projection data discontinuity-related effect, differences between CBCT devices, changes in the volume of the field of view (FOV), and changes in the relationships of size and position between the FOV and the object evaluated. A few methods of mathematical correction of the gray scales in CBCT have been proposed; however, they do not generate consistent values that are independent of the devices and their configurations or of the scanned objects. Thus, CBCT should not be considered the examination of choice for the determination of bone and soft tissue mineral density at the current stage, particularly when values obtained are to be compared to predetermined standard values. Comparisons between symmetrically positioned structures inside the FOV and in relation to the exomass of the object, as it occurs with the right and left sides of the skull, seem to be viable because the effects on the gray scale in the regions of interest are the same.

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Section: Bone Mineral Densitymentioning

confidence: 99%

Section: Cone Beam Ctmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Bone mineral density in cone beam computed tomography: Only a few shades of gray

Campos

Souza

Júnior

et al. 2014

WJR

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“…Sendo assim, e sabendo-se que ocorre a formação de um tecido ósseo imaturo, com baixa taxa de mineralização, e propenso à rápida reabsorção após a movimentação dentária (HSU et al, 2011), o que propiciaria à recidiva ortodôntica, procurou-se correlacionar a densidade óssea local com a recidiva dentária propriamente dita, após a instituição das drogas sinvastatina e tetraciclina modificada.…”

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O efeito da tetraciclina modificada e sinvastatina na recidiva da movimentação dentária no ligamento periodontal de ratos

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The effect of orthodontic treatment on the periodontium and soft tissue esthetics in adult patients

Abdelhafez

Talib

Al-Taani

2021

Clinical & Exp Dental Res

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Objective Most patients seek orthodontic treatment to achieve an esthetic outcome. Orthodontic treatment has possible negative sequelae. The aim of this study is to assess these possible effects on the periodontium and tissue esthetics. Methods One hundred fifty‐six patients who have completed orthodontic treatment at Jordan University of Science and Technology clinics were recruited. They were divided into extraction and nonextraction subgroups. Another 155 patients never undergoing orthodontic treatment were assessed. The height of papilla, width of keratinized gingiva, gingival recession, degree of tooth display, smile line, crestal bone level, and proximal caries were assessed. Chi‐ square test was used for categorical/discrete variables while independent t‐test was used for continuous variables. The level of significance was set at (p ≤ 0.05). Results The mean age was 22 years with no significant difference between the groups. There was a significant difference between “ortho” and “nonortho” groups in tooth display and keratinized gingiva (p = 0.006 and <0.001, respectively). The overall crestal bone level, smile line, recession, and papilla fill did not show any significant differences (p = 0.200, 0.067, 0.120, and 0.066, respectively). The crestal bone level in the upper and lower anterior segments was significantly lower in the “ortho” treated group compared to the “nonortho” treated group (p = 0.002 and 0.005, respectively). A significant difference between “extraction” and “nonextraction” groups was in the width of keratinized gingiva (p = 0.003) and the number of teeth displayed (p < 0.001). Despite reaching statistical significance these differences are not necessarily of clinical significance. Conclusion Orthodontic treatment clearly affects the periodontal tissues; however, the detrimental effects appear to be minimal. Patients with history of orthodontic treatment might have lower crestal bone levels at certain sites and this should not be confused with periodontal disease.

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Bone density changes around teeth during orthodontic treatment

Cited by 69 publications

References 33 publications

Bone mineral density in cone beam computed tomography: Only a few shades of gray

Bone mineral density in cone beam computed tomography: Only a few shades of gray

O efeito da tetraciclina modificada e sinvastatina na recidiva da movimentação dentária no ligamento periodontal de ratos

The effect of orthodontic treatment on the periodontium and soft tissue esthetics in adult patients

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