Polarized Versus Nonpolarized Digital Images for the Measurement of Demineralization Surrounding Orthodontic Brackets

Benson, Philip; Shah, Asad Hussain; Willmot, D. R.

doi:10.2319/121306-511.1

Cited by 31 publications

(27 citation statements)

References 23 publications

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“…Additionally, a cross-polarizing technique was applied [15]. The image quality of the camera was set to 'fine' and the ISO sensitivity was set to 200.…”

Section: Sample and Photographic Techniquementioning

confidence: 99%

“…Further, measurements of WSLs using different image processing techniques and digitally converted photographs were suggested and various researchers have confirmed the reproducibility and reliability of these methods [11][12][13][14]. Comparing polarized vs nonpolarized photographs showed that the use of a crosspolarizing filter decreases the accompanying flash reflection on digital images, thereby improving the subjective assessment of demineralized lesions surrounding an orthodontic bracket and enhancing the reproducibility of demineralization area measurements [15].…”

Section: Introductionmentioning

confidence: 97%

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Diagnosing the severity of buccal caries lesions in orthodontic patients at de-bonding using digital photographs

Almosa¹,

Lundgren²,

Bresin³

et al. 2013

Acta Odontologica Scandinavica

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“…Additionally, a cross-polarizing technique was applied [15]. The image quality of the camera was set to 'fine' and the ISO sensitivity was set to 200.…”

Section: Sample and Photographic Techniquementioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Diagnosing the severity of buccal caries lesions in orthodontic patients at de-bonding using digital photographs

Almosa¹,

Lundgren²,

Bresin³

et al. 2013

Acta Odontologica Scandinavica

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show abstract

“…One of the strengths of our study is the methods of evaluation that were utilized, as we Our objective measure of improvement assessed the change in percent of tooth surface affected (proportional change), which has been used in many previous studies 15,[17][18][19][20] , rather than absolute measurements of luminance or size 21,22 . The comparison of proportional change also allows for us to account for any differences in magnification and angulations of teeth, when using photograph images.…”

Section: Wsl Surface Areamentioning

confidence: 99%

Predicting improvement of postorthodontic white spot lesions

Kim

Katchooi

Bayiri

et al. 2016

American Journal of Orthodontics and Dentofacial Orthopedics

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Introduction:It is well known that patients undergoing orthodontic treatment are at greater risk for developing white spot lesions (WSL). Although prevention of WSLs is always the goal, they continue to be a common sequela in patients undergoing orthodontics. For this reason, understanding the patterns of WSL improvement is of great importance to both the patient and the provider. Previous studies have shown some lesions exhibiting significant improvement, while other lesions show limited to no improvement. Our study sought to identify specific patient and tooth-related factors that are most predictive for improvement. Methods: Patients aged 12-20 years, who had at least 1 WSL that developed during orthodontic treatment, were recruited from private dental and orthodontic offices. They all had their braces removed less than 2 months prior to enrollment into the study. Photos were taken at enrollment and 8 weeks later. Paired photographs from the 2 time points were blindly assessed for improvement in appearance by a panel of 5 dental professionals, and by 2 sets of evaluators for changes in surface area and appearance at the individual tooth level. Results: One hundred and one subjects were included in this study. Patient age, brushing frequency, and larger percent surface area affected were associated with increased improvement of lesions. Central incisors showed greater improvement when compared to lateral incisors. Increased time since appliance removal and increased length of orthodontic treatment were associated with decreased improvement. Gender, oral hygiene status, retainer type, location of the lesion (gingival, middle, incisal), presence of staining, and lesion diffuseness were not found to be predictive for improvement. Conclusions: Of the various patient and tooth-related factors examined; age, time since appliance removal, length of orthodontic treatment, tooth type (central vs. lateral incisor), WSL surface area, and brushing frequency had significant associations with WSL improvement.

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“…Using the Kubelka-Munk equations, Ko et al [36] showed that the optical scattering power correlated with mineral loss and yielded improved results over reflectance measurements. Benson et al [44] demonstrated that the visibility of scattering structures on highly reflective surfaces such as teeth can be enhanced by the use of crossed polarizers to remove the glare from the surface due to the strong specular reflection from the enamel surface [44,45]. The contrast between sound and demineralized enamel can be further enhanced by depolarization of the scattered light in the area of demineralized enamel [46,47].…”

Section: Reflectance Spectroscopymentioning

confidence: 99%

Diagnostic Imaging and Spectroscopy

Fried

2012

Handbook of Biophotonics

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The sections in this article are Caries Detection Optical Properties of Dental Hard Tissue Optical Properties of Dental Hard Tissue in the Visible and Near‐Infrared Regions Optical Properties of Sound Enamel and Dentin Optical Property Changes of Demineralized Enamel Optical Properties of Dental Hard Tissue in the IR region Reflectance Spectroscopy Optical Transillumination Optical Coherence Tomography Fluorescence Imaging Quantitative Light Fluorescence ( QLF ) DIAGNO dent (Porphyrin Fluorescence) Other Fluorescence‐Based Imaging Methods Thermal Imaging Infrared Spectroscopy Raman Spectroscopy and Imaging Ultrasound and Terahertz Imaging

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Polarized Versus Nonpolarized Digital Images for the Measurement of Demineralization Surrounding Orthodontic Brackets

Abstract: A cross-polarization filter enhances the subjective assessment of demineralized lesions surrounding an orthodontic bracket and improves the reproducibility of measuring the lesion area. The filter did not improve the assessment of changes in enamel gray levels with demineralization.

Cited by 31 publications

References 23 publications

Diagnosing the severity of buccal caries lesions in orthodontic patients at de-bonding using digital photographs

Diagnosing the severity of buccal caries lesions in orthodontic patients at de-bonding using digital photographs

Predicting improvement of postorthodontic white spot lesions

Diagnostic Imaging and Spectroscopy

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