• Proceedings of the KACD Conference
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• 2002.11a
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• pp.721-721
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• 2002

For about half a century. dental implants made of titanium have developed as a method of restoration for the tooth loss. In these days. the titanium implants seem to be considered as the alternative for the conventional prosthodontics. But its hard to say that the titanium implants are superior to the treatments that preserve the natural tooth. As this is a general opinion among dentists. the implant will not be able to be the alternative for all the prosthetic treatments. Clinically, there are many causes for extracting tooth. The severe destruction of the tooth structure or periodontal diseases leads to inevitable tooth extraction. When the complete cure is doubtful because of narrow intraoral visibility and improper accessibility in approaching to the tooth and periodontal lesion, we. clinicians often inevitably extract tooth. Passive treatments like conventional restoration, curettage or surgical flap cant be the perfect treatments for the tooth that has subgingival root caries or severe periodontal diseases involved furcation. Many clinicians might have been forced to pull out the relatively healthy tooth by the difficulties of approaching to the lesions and poor prognosis. Though the intentional tooth replantation is performed sometimes. as it doesnt have enough scientific foundation. it has not been considered as a popular treatment method yet. I have been felt keenly the necessity of positive tooth preservation, so I have been attempting the treatment that has new concept. calling Natural Tooth Implantation (NTI) clinically. NTI differs from the tooth replantation in the goal for the treatment and biological healing process. Now. I confirm that NT! is a very positive and valid method of tooth preservation. Like you can get from the name. NTI is the dental implant procedure using natural teeth and similar to the healing process of the titanium implants in many aspects. I have been using biocompatible composite resin. DRM. with NTI and got affirmative clinical results from that. So I would like to introduce.roduce.

• The Journal of the Korean dental association
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• v.55 no.4
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• pp.276-283
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• 2017

Maxillary sinus squamous cell carcinoma is a relatively rare disease, comprising only 3% of malignant diseases of head and neck. As the growth rate is high and its prognosis is poor compared to others, the 5-year survival rate of maxillary sinus squamous cell carcinoma(MSSCC) is 23.4-49%. We introduce two rare clinical cases of squamous cell carcinoma originated from maxillary sinus of which symptoms include toothache and gingival swelling. On clinical examinations of both patients, deep periodontal pockets on upper right posterior teeth were detected. On panoramic images, the bony destruction of the maxillary sinus and its surrounding structures were not obvious and only alveolar bone loss was noted. It is difficult to diagnose MSSCC at an early stage due to symptoms of tooth pain and gingival swelling that are similar to that of periodontal diseases. However, if the symptoms do not improve after routine treatment of upper teeth, dentists should bear in mind of underlying malignant mass as differential diagnosis, thus early detection of the lethal disease. The aim of this study is to caution dental practitioners that malignancies have a potential to mimic periodontal diseases by introducing two cases of maxillary sinus squamous cell carcinoma presented as periodontitis.

• Journal of Microbiology and Biotechnology
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• v.33 no.8
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• pp.1101-1110
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• 2023

Streptococcus mutans is the primary causative agent of caries, which is one of the most common human diseases. Thus, rapid and early detection of cariogenic bacteria is critical for its prevention. This study investigated the combination of loop-mediated isothermal amplification (LAMP) and microfluid technology to quantitatively detect S. mutans. A low-cost, rapid microfluidic chip using LAMP technology was developed to amplify and detect bacteria at 2.2-2.2 × 10⁶ colony-forming units (CFU)/ml and its detection limits were compared to those of standard polymerase chain reaction. A visualization system was established to quantitatively determine the experimental results, and a functional relationship between the bacterial concentration and quantitative results was established. The detection limit of S. mutans using this microfluidic chip was 2.2 CFU/ml, which was lower than that of the standard approach. After quantification, the experimental results showed a good linear relationship with the concentration of S. mutans, thereby confirming the effectiveness and accuracy of the custom-made integrated LAMP microfluidic system for the detection of S. mutans. The microfluidic system described herein may represent a promising simple detection method for the specific and rapid testing of individuals at risk of caries.

• Journal of Korean society of Dental Hygiene
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• v.8 no.2
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• pp.67-76
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• 2008

The purpose of this study was to determine the effect of dentifrice containing 0.1% extracts of garlic on dental plaque and gingivitis in a double blind and crossover clinical studies in 33 healthy adults aged from 20 to 22 years who provided a consent for their participation. Oral examination was performed through clinical periods and on day of baseline, 6, 13, 19, 25 days plaque index and gingival index were scored by Turesky' modified index and L$\ddot{o}$e & Silness index. After 12, 19, 25 days use of their respective dentifrices, statistically decreases of plaque index, gingival index were shown in both the experimental and the control group, respectively, Experimental group exhibited significantly the lower plaque levels and the higher levels of gingival health by the use of the dentifrices contained extract of garlic from 12 days compare with control group(p<0.05). The degree of decrease was more significant on gingivitis level of the experimental group than the control group(p <0.05). This result indicate that the use of dentifrice containing extract of garlic has a positve effect in preventing plaque and gingivitis and treating periodontal diseases.

• The Korean Journal of Health Service Management
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• v.10 no.3
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• pp.123-133
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• 2016

Objectives : This study analyzed the effect of health-related characteristics of middle-aged and elderly people on the number of existing permanent teeth by considering each age group through the improvement of health-related characteristics. This study contributes by offering fundamental information on the prevention of dental diseases and on developing an education program that can be used by dental health businesses to improve dental health. Methods : This study used primitive data of the sixth term of the first year and the second year and selected a total of 4,393 people as the final research subject. In order to determine the factors that influence the number of existing natural teeth, confounding factors were considered, and regression analysis using general linear models was done. Results : According to the results of this research, the middle-aged and elderly groups have more existing permanent teeth in the following three cases: 1. Talking is comfortable when daily brushing frequency is 3 times or more. 2. Self-recognition of dental health condition is good. 3. Number of dental caries present in permanent teeth is low. Conclusions : For a and medical system, a dental health care system that takes into consideration the lifespans of people must be legislated and implemented.

• Journal of Korean society of Dental Hygiene
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• v.17 no.6
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• pp.983-992
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• 2017

Objectives: This study is to compare measuring gingival and peridontal indices and changes in dental plaque per period using a three mix types of dentifrice and to investigate dental diseases preventive effects depending on gingivitis reducing effect of dentifrice through a clinical experiment. Methods: This study targeted adult females and males with mild to moderate gingivitis from age 20 to 60. The Calculus index, Papillary Marginal Attached Gingival (PMA) index, Gingival index, Patient Hygiene Performance (PHP) index, and Plaque index were measured at pre-experiment and at 1, 2, 4 weeks post experiment. Results: The PMA, Gingival index, PHP index, plaque index of experimentla group decreased after 4 weeks (p<0.05). Conclusions: A three mix types of dentifrice for relieving tooth sensitivity was verified to be effective in removing dental plaque and reducing gingivitis.

• Restorative Dentistry and Endodontics
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• v.40 no.1
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• pp.14-22
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• 2015

Genetic information such as DNA sequences has been limited to fully explain mechanisms of gene regulation and disease process. Epigenetic mechanisms, which include DNA methylation, histone modification and non-coding RNAs, can regulate gene expression and affect progression of disease. Although studies focused on epigenetics are being actively investigated in the field of medicine and biology, epigenetics in dental research is at the early stages. However, studies on epigenetics in dentistry deserve attention because epigenetic mechanisms play important roles in gene expression during tooth development and may affect oral diseases. In addition, understanding of epigenetic alteration is important for developing new therapeutic methods. This review article aims to outline the general features of epigenetic mechanisms and describe its future implications in the field of dentistry.

• Journal of Korean Dental Hygiene Science
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• v.4 no.1
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• pp.53-64
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• 2021

Background: The elderly in long-term care facilities tend to have a diminished oral health status, with a high prevalence of dental caries and periodontal disease, as reduced cognitive function, joint mobility, and gait ability hinder the performance of oral hygiene. To improve the oral health of the elderly at long-term care facilities, it is necessary to have precise guidelines for oral health care and assessment; however, such guidelines are not readily available. Therefore, the present study aimed to develop an oral care assessment tool with verified reliability and validity. Methods: The participants in this study were 100 elderly patients at a care facilities and 10 clinical dental hygienists. Collected data were analyzed using the descriptive statistics, content validity index, and inter-rater reliability, as well as the analyses of intra-class correlation coefficient. Results: After a review of relevant literature, a preliminary questionnaire comprised of seven questions related to the evaluation of oral health was formed. After revising and supplementing the questions through a content validity test, a total of nine questions were selected. Conclusion: The novel assessment tool developed for the present study is anticipated to allow analyses of the level of problems related to oral health care before routine and professional care. Moreover, regular oral health status check-ups will enable the early diagnosis and treatment of diseases.

• The Journal of Korean Society for School & Community Health Education
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• v.14 no.3
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• pp.89-99
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• 2013

Objectives: This study was designed to examine the effects of oral health behaviors and use of dental clinics on periodontal diseases in women, the purpose of this study is to provide basic information to develop program for dental health promotion in young women. Methods: We conducted a survey targeting 486 women that agreed with the survey and were going to dental clinic from October 1, 2013 to October 18, 2013. We surveyed them by self-administered questionnaire and analyzed it by SPSS Win 19.0 program. Results: 1. For differences in periodontitis according to general characteristics, if th age is high, ratio of periodontitis is high. Married woman is higher than single one in ratio of periodontitis. Also the more number of birth, the higher ratio of periodontitis is.(p<.05) 2. For differences of periodontitis by dental care behavior, ratio of periodontitis of non-smokers is significantly low. For one that brush one's teeth broadside, the ratio of periodontitis is high.(p<.05) 3. For differences of periodontitis by use of dental clinic service, ratio of periodontitis of one that have more times visit to a dental clinic, more annual average cost for dental care, and regular dental check-ups is relatively low.(p<.05). 4. For determinant factors influencing on periodontitis, ratio of periodontitis of one that is old, have more stress, have a low level of education, and have preventive dental care is high. Ratio of periodontitis of one that have less toothbrushing and brush one's teeth after having lunch or a snack and before sleeping is significantly low. Conclusions: From this study, dental health behavior as the factor influencing on periodontitis of young women is statistically meaningful. Because this dental health behavior has a lot of potential to be improved by government and local community efforts such as education and social support, we think that systematic and various educational program development is needed to strengthen self dental care ability effectively with policy support.

• Journal of Korean society of Dental Hygiene
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• v.21 no.5
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• pp.675-683
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• 2021

Objectives: This study aimed to verify the relations of COVID-19 infection-related knowledge, dental infection control performance, and psychosocial health of dental hygienists. Methods: From the data was analyzed through the frequency analysis, t-test, one way ANOVA, and pearson's correlation analysis with a total of 198 dental hygienists using SPSS Statistics 21.0. Results: The correct answer rate for knowledge about COVID-19 was higher with a bachelor's degree or higher. Thus, when the level of education was higher, the performance was also high (p<0.01). COVID-19 infection control performance was highly shown in case of high age (4.43) (p<0.05) and the married (4.42) (p<0.01). Infection control performance was high when they had an educational experience of COVID-19 infection control (4.46), and when the infection control guidebooks were equipped in their workplaces (p<0.001). Degree of psychosocial health of research subjects was shown in the order of potential stress (60.6%), high-risk stress (23.7%), and healthy (15.7%). Infection control performance was higher, the psychosocial health was healthy. Conclusions: For the response to COVID-19 infectious disease and the preparation for mutated viruses and new infectious diseases in the future, it would be necessary to establish the concrete measures for establishing the strict infection control system for dental clinics and also enhancing the psychosocial health of dental hygienists.