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New portable system for dental plaque measurement using a digital single-lens reflex camera and image analysis: Study of reliability and validation

BACKGROUND: The quantification of the dental plaque (DP) by indices has limitations: They depend on the subjective operator's evaluation and are measured in an ordinal scale. The purpose of this study was to develop and evaluate a method to measure DP in a proportional scale. MATERIALS AND METH...

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Autores principales: Rosa, Guillermo Martin, Elizondo, Maria Lidia
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Medknow Publications & Media Pvt Ltd 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4520111/
https://www.ncbi.nlm.nih.gov/pubmed/26229267
http://dx.doi.org/10.4103/0972-124X.152415
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author Rosa, Guillermo Martin
Elizondo, Maria Lidia
author_facet Rosa, Guillermo Martin
Elizondo, Maria Lidia
author_sort Rosa, Guillermo Martin
collection PubMed
description BACKGROUND: The quantification of the dental plaque (DP) by indices has limitations: They depend on the subjective operator's evaluation and are measured in an ordinal scale. The purpose of this study was to develop and evaluate a method to measure DP in a proportional scale. MATERIALS AND METHODS: A portable photographic positioning device (PPPD) was designed and added to a photographic digital single-lens reflex camera. Seventeen subjects participated in this study, after DP disclosure with the erythrosine, their incisors, and a calibration scale ware photographed by two operators in duplicate, re-positioning the PPPD among each acquisition. A third operator registered the Quigley-Hein modified by Turesky DP index (Q-H/TPI). After tooth brushing, the same operators repeated the photographs and the Q-H/TPI. The image analysis system (IAS) technique allowed the measurement in mm(2) of the vestibular total tooth area and the area with DP. RESULTS: The reliability was determined with the intra-class correlation coefficient that was 0.9936 (P < 0.05) for the intra-operator repeatability and 0.9931 (P < 0.05) for inter-operator reproducibility. The validity was assessed using the Spearman's correlation coefficient that indicated a strong positive correlation with the Q-H/TPI r(s) = 0.84 (P < 0.01). The sensitivity of the IAS was evaluated with two sample sizes, only the IAS was able to detect significant differences (P < 0.05) with the sample of smaller size (n = 8). CONCLUSIONS: Image analysis system showed to be a reliable and valid method to measure the quantity of DP in a proportional scale, allowing a more powerful statistical analysis, thus facilitating trials with a smaller sample size.
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spelling pubmed-45201112015-07-30 New portable system for dental plaque measurement using a digital single-lens reflex camera and image analysis: Study of reliability and validation Rosa, Guillermo Martin Elizondo, Maria Lidia J Indian Soc Periodontol Original Article BACKGROUND: The quantification of the dental plaque (DP) by indices has limitations: They depend on the subjective operator's evaluation and are measured in an ordinal scale. The purpose of this study was to develop and evaluate a method to measure DP in a proportional scale. MATERIALS AND METHODS: A portable photographic positioning device (PPPD) was designed and added to a photographic digital single-lens reflex camera. Seventeen subjects participated in this study, after DP disclosure with the erythrosine, their incisors, and a calibration scale ware photographed by two operators in duplicate, re-positioning the PPPD among each acquisition. A third operator registered the Quigley-Hein modified by Turesky DP index (Q-H/TPI). After tooth brushing, the same operators repeated the photographs and the Q-H/TPI. The image analysis system (IAS) technique allowed the measurement in mm(2) of the vestibular total tooth area and the area with DP. RESULTS: The reliability was determined with the intra-class correlation coefficient that was 0.9936 (P < 0.05) for the intra-operator repeatability and 0.9931 (P < 0.05) for inter-operator reproducibility. The validity was assessed using the Spearman's correlation coefficient that indicated a strong positive correlation with the Q-H/TPI r(s) = 0.84 (P < 0.01). The sensitivity of the IAS was evaluated with two sample sizes, only the IAS was able to detect significant differences (P < 0.05) with the sample of smaller size (n = 8). CONCLUSIONS: Image analysis system showed to be a reliable and valid method to measure the quantity of DP in a proportional scale, allowing a more powerful statistical analysis, thus facilitating trials with a smaller sample size. Medknow Publications & Media Pvt Ltd 2015 /pmc/articles/PMC4520111/ /pubmed/26229267 http://dx.doi.org/10.4103/0972-124X.152415 Text en Copyright: © Journal of Indian Society of Periodontology http://creativecommons.org/licenses/by-nc-sa/3.0 This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Article
Rosa, Guillermo Martin
Elizondo, Maria Lidia
New portable system for dental plaque measurement using a digital single-lens reflex camera and image analysis: Study of reliability and validation
title New portable system for dental plaque measurement using a digital single-lens reflex camera and image analysis: Study of reliability and validation
title_full New portable system for dental plaque measurement using a digital single-lens reflex camera and image analysis: Study of reliability and validation
title_fullStr New portable system for dental plaque measurement using a digital single-lens reflex camera and image analysis: Study of reliability and validation
title_full_unstemmed New portable system for dental plaque measurement using a digital single-lens reflex camera and image analysis: Study of reliability and validation
title_short New portable system for dental plaque measurement using a digital single-lens reflex camera and image analysis: Study of reliability and validation
title_sort new portable system for dental plaque measurement using a digital single-lens reflex camera and image analysis: study of reliability and validation
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4520111/
https://www.ncbi.nlm.nih.gov/pubmed/26229267
http://dx.doi.org/10.4103/0972-124X.152415
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