• Journal of dental hygiene science
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• v.21 no.4
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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.

• Journal of Periodontal and Implant Science
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• v.49 no.6
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• pp.397-405
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• 2019

Purpose: This study examined the prevalence and risk factors of peri-implant disease after at least 7 years of dental implant loading. Methods: A total of 111 patients with 218 dental implants were treated. The follow-up period for all implants was at least 7 years. The patients' dental records were collected and risk factors of peri-implant disease were investigated through logistic regression analysis. Results: The overall implant survival rate was 95.87%, because 9 of the 218 implants failed. The prevalence of peri-implant mucositis and peri-implantitis was 39.7% and 16.7%, respectively. As risk factors, smoking and prosthetic splinting showed significant associations with peri-implantitis (P<0.05). Conclusions: Within the limits of this study, no significant correlations were found between any risk factors and peri-implant mucositis, but a significantly elevated risk of peri-implantitis was observed in patients who smoked or had splinted prostheses in 2 or more implants.

• Journal of Korean society of Dental Hygiene
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• v.21 no.5
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• pp.499-506
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• 2021

Objectives: This case - study was conducted to assess the oral health status change of the elderly through visiting oral care interventions based on a community health care project. Methods: Professional dental hygiene treatment and oral health education, including brushing using interdental toothbrushes and sponge brushes, were performed on three senior citizens who received home visiting oral health care benefit. Results: The subject's periodontal conditions improved including gingival inflammation and bleeding. The gingival color tured pink by controlling the dental plaque. Conclusions: Visiting oral health care contributed to the improvement of oral health of the elderly. Therefore, based on the characteristics of the elderly with various systemic diseases, it is necessary to discover various cases that can perform professional and customized visiting oral health care programs.

• Journal of dental hygiene science
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• v.5 no.1
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• pp.1-5
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• 2005

Ethical perception may be thought of as 'professional skills'. Despite this, however, the dental hygiene curriculums tend to disregard ethics education. This paper describes ethical perception in dental hygiene students. Questionnaire surveys were conducted for 374 in dental hygiene students. For statistical analyses of collected data, the multiple linear regression were adopted. Demand as necessity of dental ethics education, clinical practice exercise, practice of work ethics education were found to have significant major effects on basic ethics perception. The major variables which related to the licensure and health care law and teamwork were to knowledge of revised ethics code of dental hygienist and to demand as necessity of dental ethics education. The major variables influencing the professional protocol were to knowledge of revised ethics code of dental hygienist, to demand as necessity of dental ethics education, role model for learning ethical principles. Revised ethics code of dental hygienist was the most important factor affecting professional protocol. The major variables influencing the decision-making were to demand as necessity of dental ethics education, to knowledge of revised ethics code of dental hygienist, clinical practice exercise, role model for learning ethical principles (church). About 88.4% of the students unawared to knowledge of revised ethics code of dental hygienist and perception of professional protocol of the students awared to knowledge of revised ethics code of dental hygienist was $3.44{\pm}0.23$ (p=0.000).

• Journal of Korean Academy of Dental Administration
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• v.8 no.1
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• pp.15-23
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• 2020

The aim of this study is to identify future-oriented tasks for Korean dental hygienists based on a literature review. A literature search is performed using 14 keywords related to tasks carried out by dental hygienists, and included articles published from 2000 to 2019 in the databases KISS, RISS, DBpia, NDSL, Papersearch, Pubmed, and Google Scholar. Six reviewers assessed the titles and abstracts of articles, and an article was selected if the study was considered to cover future-oriented tasks for Korean dental hygienists. Based on the results six local studies and two foreign studies were used for literature review and data extraction. In total, 38 tasks were classified as future-oriented tasks of dental hygienists according to the following criteria: 1) tasks that were specifically referred to as future-oriented tasks, and 2) tasks that could be classified as future-oriented tasks although no specific reference was made. Of these, the most frequently mentioned tasks were measuring periodontal pocket depth, dental hygiene assessment, providing dietary advice, infiltration anesthesia, and root planing. These were extracted from five of the eight studies, including both local and foreign studies. Dental hygiene planning, emergency, emergency management, and smoking cessation were the next most common tasks based on four studies. Even though some of these future-oriented tasks for Korean dental hygienists are included in the dentistry curriculum, and are currently performed as clinical practice for dental hygienists. Nonetheless, the reference to the legal scope is unclear. It is necessary to reconsider the scope of tasks of dental hygienists to reflect changes in domestic and foreign dental care delivery, thereby contributing to the oral health promotion of the public, where safety is guaranteed under legal protection.

• The Journal of Korean Academy of Prosthodontics
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• v.40 no.2
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• pp.184-192
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• 2002

The purpose of this study was to investigate the abrasion resistance and surface roughness of conventional dental stones and improved dental stones and newly developed dental stones. Materials included in this study were several dental stones and newly developed dental stone; 2 type III. 6 type IV (including newly developed dental stone). 1 type V Ten specimens for each material, total ninety specimens were made. Each specimen was subjected to 50 complete cycle abrasion under constant load 0.42N at speed or 6mm per sec. The depth after abrasion test was measured for each specimen. Surface roughness before and after abrasion test was compared. The results were as follows ; 1. The resin containing die materials such as Tuff Rock and Resin Rock had superior abrasion resistance. 2. Type IV, V dental stone exhibited greater abrasion resistance than Type III dental stone. 3. The results or the surface roughness showed similar pattern with the abrasion resistance.

• Journal of Korean society of Dental Hygiene
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• v.22 no.6
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• pp.503-512
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• 2022

Objectives: This study aimed to study the association between unmet dental treatment and depression in the dental area of the elderly. Methods: The data was from the 7th period of the National Health and Nutrition Examination Survey. Multiple logistic regression analysis was performed to evaluate the relationship between depression and unmet dental treatment when confounding factors such as income quintile and smoking were considered. Statistical software, SAS 9.4 version was used. Results: After correcting all confounding factors, the analysis showed that the experience of unmet dental treatment was 2.73 times more likely among depressed men and 2.52 times more likely among depressed women (p<0.05). Conclusions: The results of this study suggested that we should consider that depression in the elderly can affect unmet dental treatment regardless of gender.

• Molecules and Cells
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• v.46 no.4
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• pp.245-255
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• 2023

This study aimed to exploring the pathophysiological mechanism of 7α,25-dihydroxycholesterol (7α,25-DHC) in osteoarthritis (OA) pathogenesis. 7α,25-DHC accelerated the proteoglycan loss in ex vivo organ-cultured articular cartilage explant. It was mediated by the decreasing extracellular matrix major components, including aggrecan and type II collagen, and the increasing expression and activation of degenerative enzymes, including matrix metalloproteinase (MMP)-3 and -13, in chondrocytes cultured with 7α,25-DHC. Furthermore, 7α,25-DHC promoted caspase-dependent chondrocyte death via extrinsic and intrinsic pathways of apoptosis. Moreover, 7α,25-DHC upregulated the expression of inflammatory factors, including inducible nitric oxide synthase, cyclooxygenase-2, nitric oxide, and prostaglandin E₂, via the production of reactive oxygen species via increase of oxidative stress in chondrocytes. In addition, 7α,25-DHC upregulated the expression of autophagy biomarkers, including beclin-1 and microtubule-associated protein 1A/1B-light chain 3 via the modulation of p53-Akt-mTOR axis in chondrocytes. The expression of CYP7B1, caspase-3, and beclin-1 was elevated in the degenerative articular cartilage of mouse knee joint with OA. Taken together, our findings suggest that 7α,25-DHC is a pathophysiological risk factor of OA pathogenesis that is mediated a chondrocyte death via oxiapoptophagy, which is a mixed mode of apoptosis, oxidative stress, and autophagy.

• Journal of Technologic Dentistry
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• v.43 no.2
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• pp.69-69
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• 2021

• Journal of Technologic Dentistry
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• v.26 no.1
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• pp.59-67
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• 2004

The purpose of this study was to research the recognition of Korean Dental Technicians in Busan region about retitle of the name of 'Dental Technician'(DT), then to figure out the reality of retitle of the name(DT), so to provide data for whole country survey and to drive of the retitle of DT by Korea Dental Technicians Association. For these purpose, 250 subjects were sampled out of dental technicians in Busan, and the survey was performed with self-administered questionnaire. Out of all collected questionnaires, 192 pieces(76.8%) were addressed for this study. 1) Their desires on changing of the name(DT), 57.4%(74/129) was agreed. 2) If they could change the name(DT), they hope 3 main new names and the others, Dental Lab Art Technician(39.2%), Certified Dental Technician(23.0%), Dental Prosthetic Technician(23.0%), the others(14.8%).