• Journal of dental hygiene science
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• v.7 no.4
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• pp.207-211
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• 2007

Many studies reported that the presence of cervical enamel projection (CEP) in cemento-enamel junction(CEJ) is greatly related to periodontal disease. The aim of this study was to investigate the prevalence of enamel projections in buccal, mesial, distal and lingual(palatal) surface of maxillary and mandibular first and second molars on extracted teeth. Among 660 teeth extracted due to the periodontal disease and dental caries in Seoul National University Dental Hospital was examined, 530 teeth which has distinct CEJ were examined with 8 times x electronic magnifier by one examiner. The prevalence of CEP for maxillary teeth (45.49%) was higher than that of mandible (39.62%). The first molar (45.22%) had more CEP than second (39.89%). Furthermore, buccal surface had highest incidence of CEP than other surfaces. The results of this study imply that the clinicians should take good care of the prevalence of CEP when scaling or root planning, plaque control instruction and periodontal surgery.

• Journal of Korean society of Dental Hygiene
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• v.10 no.2
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• pp.335-344
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• 2010

Objectives : Targeting Korean adults, the food pattern are grasped. And, its correlation with oral disease is analyzed. In order to offer basic data to developing the nutritional policy and nutritional program for the future prevention from oral disease, a research was conducted by utilizing the Korean National Health and Nutrition Examination Survey 2005(the 3rd term). Methods : The subjects in this study were 6,526 adults in more than fully 19 years among 9,047 persons who participated in the food intake survey out of those who completed the health interview survey. The statistical analysis was analyzed by using SPSS 12.0 program. Results : 1. As a result of Group Analyzing was indicated to dangerous-type food pattern and protection-type food pattern. 2. As a result of analyzing the answers for having dental caries in the annually personal recognition was indicated to be high in the dangerous-type food pattern, and had not the statistically significant difference. 3. As a result of analyzing the answers for having periodontal disease in the annually personal recognition was indicated to be high in the dangerous-type food pattern, and had the statistically significant difference(p<0.05). 4. As a result of analyzing the food pattern factors that have influence upon both major oral illnesses in the annually personal recognition, the person, who has the dangerous-type food pattern, had high risk level of the periodontal disease in the annually personal recognition. Conclusions : In the above results, as a result of surveying and analyzing importance of the food pattern in the incidence of both major oral illnesses, it is considered that there will be necessity of continuing to research into developing the nutritional policy and nutritional program in order to prevent oral illness in the future.

• Environmental Analysis Health and Toxicology
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• v.14 no.3
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• pp.113-120
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• 1999

Fluorination of drinking water has been used world widely to reduce the incidence of caries. Recently, contradictory results on the cytotoxicity of fluoride compounds are reported. In addition, there are attempts to use fluorosilicate for fluorination of drinking water in Korea, therefore, we tried to analyze the cytotoxicity of fluoride compounds on oral epidermoid carcinoma (KB and A253) and osteosarcoma (HOS and MG-63) cells in this study. We treated cells with 0, 10, 50 and 250 ppm of fluorosilicic acid (domestic or from Fluka, F$\_$6/H$_2$Si), sodium fluorosilicate (F$\_$6/Na$_2$Si), sodium fluoroacetate (FCH$_2$CO$_2$Na), sodium fluoride (NaF) or potassium fluoride(KF) and measured the relative cell survival by MTT assay. At the concentration of < 10ppm, no significant cytotoxicity was observed. At 50 ppm, each cells revealed different response to fluoride treatment. Among cells used in this study, MG-63 was the most resistant to fluoride treatment. Comparable toxicity data from domestic and imported fluorosilicic acids were obtained. When we compared the relative cytotoxicity of fluoride compounds against their fluoride contents, the differences in relative cell survival were smaller. Most of cells showed < 20% of survival at 250 ppm. In order to analyze the pH dependence of the cytotoxicity of fluorosilicates, the pH of cell culture media containing fluorosilicate was adjusted to 7.4 or 6.5 and the relative cytotoxicity was measured. At lower pH, about 10% higher cytotoxicity was obtained. Thus, our data suggested that the toxicity of domestic fluorosilicic acid was similar to that of fluorosilicic acid from Fluka, and the cytotoxicity of fluoride compounds was dependent on the relative content of fluoride and pH.

• Journal of Nutrition and Health
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• v.6 no.4
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• pp.23-36
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• 1973

This study was designed to compare the effect of dietary intakes on different quality protein & levels of caloric consumption supplemented by sugar at the level of 26% of total caloric intakes. 30 males and same number of females of Albino rats, aged 30-40 days were devided into following six groups, 5 rats each. ACO Group: Ad libitum, Casein, no sugar group ACS Group: Ad libitum, Casein, 26% sugar supplemented group RBO Group: 50% restriction,Bean, no sugar group RBS Group: 50% restriction, Bean, 26% sugar supplemented group RAO Group: 50% restriction, Anchovy, no sugar group RAS Group: 50% restriction, Anchovy, 26% sugar supplemented group The rats were kept in individual cage and given 6 different diet for 12 weeks. The result of this study were elucidated as follow. Body weight gained and organ weight showed no significant differences between sugar supplemented group and the others. It was noteworthy that the shrinkage of female sex organ supplemented by sugar in the diet showed lower degree than that of compared groups in this study. In other word, degree of shrinkage due to protein-caloric restriction was decreased by sugar supplementation. Nitrogen Metabolism and total nitrogen retention were not observed any significant differences between sugar supplemented group and the others. Dental caries showed higher incidence for sugar supplemented groups. Hematology and bone growth showed no differences in this study. The similar results on the metabolic effects concerned the above view Points were obtained in the different protein groups such as bean & anchovy as protein sources in the diet. Caloric restriction Produced a lower growth-rate, lower body weight and poorer long bone growth. But composition of bone ash, concentration of nitrogen, calcium and blood glucose, liver fats and liver water content maintenanced at the same levels of standard group.

• Maxillofacial Plastic and Reconstructive Surgery
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• v.32 no.3
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• pp.265-269
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• 2010

Radiation therapy for malignancy of head and neck leads to secondary effects, such as mucositis, xerostomia, dental caries and osteoradionecrosis. Osteoradionecrosis is a delayed complication which causes chronic pain, infection and constant deformity after necrosis. It occurs spontaneously or after primary oncologic surgery, dental extraction or by trauma of prosthesis. To reduce the incidence of osteoradionecrosis, appropriate antibiotic usage, atraumic procedure, tension-free primary suture and hyperbaric oxygen therapy are essential. This case is about a 74 years old woman who was treated for osteoradionecrosis after extraction of right lower molar at year 2006. She had received radiation therapy for angiosarcoma on tongue at year 2004. At year 2008 the patient came to our hospital for extraction of the opposite premolar but despite careful treatment, osteoradionecrosis occurred again. She was successfully treated by surgical procedure so we report this case.

• The Journal of Korea Assosiation for Disability and Oral Health
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• v.13 no.1
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• pp.1-5
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• 2017

According to the Ministry of Health and Welfare, the portion of physical disability was 51.4% which was the highest among the registered disabled in December 2015, followed by visual disability(10.1%), disability of the brain lesions(10.0%), hearing disability(10.0%). The aim of this study is to investigate the types of disability in patients with disabilities visiting the Pediatric Dentistry, Chonbuk National University Dental Hospital in 2016. Of the patients who visited the pediatric dentistry, 196 patients (7.5%) had disabilities, and 19 patients had two or more disabilities. Twelve patients (6.1%) had both disabilities of brain lesion and intellectual disorder. Of the 177 patients with only one disability, 54 patients (30.5%) had physical disorders and 123 patients (69.4%) had psychiatric disorders. In psychiatric disorders, intellectual disorder was the most with 98 patients (55.3%), followed by autistic disorder with 23 patients (12.9%). In physical disorders, disability of brain lesion was the most with 37 patients (20.9%), followed by speech disability with 8 patients (4.5%). In this study, as a result of analyzing the types of disability with the patients who visited the Pediatric Dentistry of Chonbuk National University Dental Hospital, most of them had either intellectual disorder, disability of brain lesion, or autistic disorder. Dentists need to understand their general and dental characteristics to treat children and adolescents with disabilities. Since the most chief complaint of the patients was dental caries, early interventions should be made by dentist to reduce the incidence of the disease.

• Journal of Korean society of Dental Hygiene
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• v.18 no.5
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• pp.653-664
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• 2018

Objectives: The purpose of this study was to examine the association between two major oral diseases and cardiovascular diseases. Methods: Data from the 6th Korean National Health and Nutrition Examination Survey (2013-2015) were used. The study included 12,754 adults, aged ${\geq}19years$, who participated in the questionnaire survey of health related to hypertension, stroke, myocardial infarction, and angina pectoris as well as completed blood tests, anthropometry, and oral examination. Statistical analyses included complex sample frequency, complex sample general linear, complex sample cross-tabulation, and complex sample logistic regression analyses. Results: With respect to the number of Decayed-Missing-Filled-Teeth(DMFT ), patients with hypertension (DMFT 8.05), stroke (DMFT 8.66), and angina pectoris (DMFT 8.24) showed a DMFT score of >2, compared with those who did not have these diseases (p<0.05). Patients with hypertension, stroke, myocardial infarction, and angina pectoris presented an approximately 2.7, 3.5, 4, and 3 times higher incidence of periodontal diseases, respectively, than those who did not (p<0.05). Based on the analysis of the relationship between the number of DMFT and cardiovascular diseases, patients with cardiovascular diseases had a risk of 1.033 higher DMFT than those who did not (p<0.05). As per the analysis of the relationship between periodontal diseases and cardiovascular diseases, patients with cardiovascular diseases had a 2.969 higher risk of periodontaldiseasesthanthosewithout them (p<0.05). Conclusions: Two major oral diseases were found to be associated with cardiovascular diseases. Therefore, to prevent these major oral diseases in patients with cardiovascular diseases, oral hygiene management must be actively performed.

• The Journal of Korea Assosiation for Disability and Oral Health
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• v.11 no.2
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• pp.53-57
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• 2015

Most special health care needs (SHCN) people suffer from oral health problems due to high incidence and severity of oral disease. The aim of the present study was to investigate the characteristics of dental treatment provided in this patient population. The study population comprised 485 SHCN patients who visited Kyung Hee University Dental Hospital from 2006 to 2014. Based on the medical record, the date were evaluated according to age, gender, type of disorder, reason for visit, type of behavior management, and type of dental treatment. The most common age group was 7-12 year olds (26%). The chief compliant was dental caries (39%), as followed by oral exam (12%) and trauma (12%). Approximately half of SHCN patients (45.9%) was treated under behavior management. Restorative treatment was the most common procedure with the average of 2.9 teeth treated per patient. The results of the present study may be valuable for establishing the data of SHCN patients for primary dental care.

• Journal of Korean Academy of Oral Health
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• v.41 no.1
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• pp.16-21
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• 2017

Objectives: Dental caries and periodontitis are major oral bacterial infections associated with dental plaque. Infection and inflammation play a role in carcinogenesis, and a significant link has been found between some highly prevalent oral and dental diseases and some types of cancer. Therefore, the aim of this study was to evaluate the relationship between cancer and oral health among Korean adults. Methods: Data from the 6th Korea National Health and Nutrition Examination Survey were used to analyze the incidence of cancer according to oral health. Demographic and socioeconomic statuses and oral behavior of the participants was analyzed using complex chi-square tests. Logistic regression was used to analyze the relationship between a high DMFT index and cancer by calculating the 95% confidence intervals. Results: In total, 6,450 case-control subjects were included. Significant difference was observed in the DMFT index, but not in periodontal diseases, between the cases and controls. The odds ratio for cancer was 1.80 (95% confidence interval: 1.18 to 2.73) in the high-risk group. However, no significant difference was observed after adjusting for age, education level, and income. Conclusions: The results provide potential evidence of a significant association between cancer and oral disease.

• Journal of the korean academy of Pediatric Dentistry
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• v.44 no.2
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• pp.154-163
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• 2017

This study aims to investigate the utilization status of dental services by foreign children living in Seoul and their level of satisfaction with the treatments. We developed a structured questionnaire with 35 questions, which comprised 14 questions (demographic characteristics) and 21 questions (oral hygiene and dental experience of the child). In this study, the distribution of nationality of 391 participants differed from the actual statistics in Korea. It consisted of high percentage of participants from African countries (23.6%), as well as North American countries (24.1%). In addition, the education status of most parents was above the level of college graduate. Despite the relatively high socioeconomic status of the participants, they showed minimal dental health knowledge regarding the aspect of oral hygiene. Utilization of dental health services and the types of dental clinics visited by them were similar before and after coming to Korea. The participants showed overall satisfaction with the care, but many of them expressed the need for improvement with regard to treatment fee and communication. In conclusion, foreign children living in Seoul require appropriate dental health education and governmental support to promote regular dental check-ups, to improve their overall oral health, and prevent the incidence of dental caries.