• 치위생과학회지
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• 제21권4호
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• pp.219-226
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• 2021

Background: Proper detection and management of dental plaque are essential for individual oral health. We aimed to evaluate the maturation level of dental plaque using a two-tone disclosing agent and to compare it with the fluorescence of dental plaque on the quantitative light-induced fluorescence (QLF) image to obtain primary data for the development of a new dental plaque scoring system. Methods: Twenty-eight subjects who consented to participate after understanding the purpose of the study were screened. The images of the anterior teeth were obtained using the QLF device. Subsequently, dental plaque was stained with a two-tone disclosing solution and a photograph was obtained with a digital single-lens reflex (DSLR) camera. The staining scores were assigned as follows: 0 for no staining, 1 for pink staining, and 2 for blue staining. The marked points on the DSLR images were selected for RGB color analysis. The relationship between dental plaque maturation and the red/green (R/G) ratio was evaluated using Spearman's rank correlation. Additionally, different red fluorescence values according to dental plaque accumulation were assessed using one-way analysis of variance followed by Scheffe's post-hoc test to identify statistically significant differences between the groups. Results: A comparison of the intensity of red fluorescence according to the maturation of the two-tone stained dental plaque confirmed that R/G ratio was higher in the QLF images with dental plaque maturation (p<0.001). Correlation analysis between the stained dental plaque and the red fluorescence intensity in the QLF image confirmed an excellent positive correlation (p<0.001). Conclusion: A new plaque scoring system can be developed based on the results of the present study. In addition, these study results may also help in dental plaque management in the clinical setting.

• Imaging Science in Dentistry
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• 제53권3호
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• pp.209-216
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• 2023

Purpose: This study was conducted to compare dental plaque scores obtained through clinical examinations and various imaging techniques, as well as to assess the effectiveness of herbal and conventional toothpastes for plaque removal. Materials and Methods: Thirty volunteers were divided into 3 groups. Each group was given a different toothpaste (from 2 herbal toothpastes and a conventional toothpaste) with which to brush their teeth for 21 days. Both initially and after brushing, dental plaque samples were collected, and plaque on the buccal surfaces of anterior teeth was scored using several imaging systems after staining with a disclosing agent. Specifically, digital dental photography, intraoral digital scanning, and FluoreCam imaging were employed to capture intraoral images. The Turesky Modified Quigley-Hein Plaque Index was used for clinical examination and image analysis. Quantitative polymerase chain reaction analyses and correlational assessments between clinical examination and imaging scores were conducted before and after toothpaste use. The Shapiro-Wilk test and Pearson correlations were utilized. Results: The lowest mean value was observed in the clinical examination without staining, while the highest was obtained using the FluoreCam method. No significant change was found in the level of any microorganism assessed following toothpaste use (P<0.05), with the exception of a decrease in S. mutans levels after using conventional toothpaste (P<0.05). Conclusion: Herbal toothpaste demonstrated plaque-removal effectiveness comparable to that of conventional toothpaste. The use of imaging methods for measuring plaque index has been suggested as a means to educate patients about plaque control and promote ongoing oral care.

• 한국지능시스템학회논문지
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• 제25권3호
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• pp.229-235
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• 2015

본 연구는 A-대학 학생들에 대하여 조사 전에 성적 공개에 사용되어진다는 사실을 인지한 조사 2와 인지 사실이 없는 조사 1 간 네 자리 숫자 비밀번호(PINs) 사용형태를 비교 분석한 내용이다. 학생들에겐 조사 2가 조사 1에 비해 민감도가 다소 높은 상황으로 인식될 수 있으며, 분석 결과, 주의를 기울이지 않고 사용하는 대표적인 번호들의 사용량이 조사 2는 조사1에 비해 현저히 줄어들었으며, 여학생들이 남학생들에 비해 더 두렷한 사용감소세를 보였다. 자리별로 사용된 숫자들을 대상으로 분석한 결과 셋째자리만 제외한 거의 모든 자리에서 사용된 숫자들의 출현빈도 간 차이를 보였으며, 각각의 PINs들을 x축은 자리 위치를 y축은 각 자리별 사용된 숫자를 나타내는 꺽은선 그래프로 묘사한 패턴분석 결과 증가 형이 많이 나타난 조사 1에 비해 조사2에서는 감소 형이 많이 나타나는 등 다양한 차이가 있음을 알 수 있었다. 연구 결과 민감도가 높아지면 학생들은 PINs 번호 사용 시 주의를 더 기울인다는 사실을 다각적인 분석을 통해 알 수 있었다.