• Journal of dental hygiene science
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• v.14 no.2
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• pp.150-157
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• 2014

The aim of this study was to suggest a convenient method of monitoring the gingival state through plaque detection. Quantitative Light-Induced Fluorescence-Digital (QLF-D), which can assess mature plaque, can be used to assess the oral hygiene status of individuals and to establish an adequate intervention plans for them. The subjects of the study participated in the clinical training at Department of Dental Hygiene, N University. The subjects completed questionnaires on general characteristics and oral hygiene methods. Then, photographs of maxillary and mandibular anterior teeth of the subjects were taken using the QLF-D. After the oral examinations, gingival state was recorded according to the $L{\ddot{o}}e$ & Silness's Gingival Index (GI). In addition, a plaque control record was calculated in percentage using disclosing agent. The analysis of the relation between the plaque control record and the QLF-D scores showed positive correlation (r=0.638, p<0.001), and the analysis of the relation between the QLF-D scores and the gingival bleeding index scores also showed positive correlation (r=0.562, p<0.001). Besides, the study classified the participants into healthy gingiva group and the gingivitis group according to the classification criteria of GI, and when the difference of QLF-D scores between the groups was analyzed, the QLF-D scores were statistically significantly higher (t=-2.785, p=0.007) in the gingivitis group ($1.71{\pm}1.545$) than the healthy gingiva group ($0.74{\pm}1.290$). When the differences in mean values of the QLF-D scores were analyzed against and the gingival bleeding index scores, the QLF-D scores of 0 and 1 belonged to the category of normal gingival state while the QLF-D scores of 2, 3 and 4 belonged to the category of gingivitis state. Therefore, it is deemed that the red fluorescence detected by the QLF-D from the mature supragingival plaque can be used for monitoring the state of gingivitis.

• Journal of dental hygiene science
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• v.11 no.4
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• pp.311-317
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• 2011

The aim of this analysis was to investigate the relationship between the level of safety behavior and the level of oral health behavior among Korean children. Data used in this analysis were from the 2005 Korean National Health and Nutrition Examination Survey (KNHANES). A representative sample of 4,292 children aged from three to eleven years who completed both health interview and health behavior survey. Simple and multiple logistic regression analyses were conducted. All analyses were weighted and SAS 9.1 survey data analysis procedures were used to estimate standard errors accounting for the complex sampling design of the KNHANES. More than seventy percent of children did not keep general safety behaviors except seat on back seat in a car. About seventy five percent of children had experience of preventive oral care during last one year, but about fifty six percent of children brush their teeth twice a day. Socioeconomic status and health behaviors were significantly related in three to six old age group only (p<.05). Generally significant relationship was not found between general safety and oral health behaviors. Among Korean children, general safety and oral health behaviors might be not related each other. Education for general safety behaviors should be underlined for all children. Especially preschool-children with low socioeconomic status need to be educated for healthy behaviors.

• Journal of Preventive Medicine and Public Health
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• v.41 no.5
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• pp.307-314
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• 2008

Objectives : We conducted an epidemiologic survey to evaluate the effect of the aircraft noise exposure on the health of the residents near the military airbases in Pyeongtaek City. Methods : The evaluation of environmental noise level, questionnaire survey, and health examination were performed for 917 residents. The study population consisted of four groups: subjects who lived in the village close to the fighter airbase (high exposure), subjects who lived along the course of fighters (intermediate exposure), and subjects near a helicopter airbase, and the control group. Results : The prevalence of the aircraft noise related accident and irritable bowel syndrome in the exposure groups were higher than that of the control group. The risks of noise induced hearing loss, hypertension and diabetes mellitus were higher in the exposed groups than in the control group. The prevalence of anxiety disorder and primary insomnia were higher in the exposed groups than in the control group. Prevalence odd ratios of the risk for primary insomnia after adjusting age, sex, agricultural noise, and occupation were 4.03 [95% confidence interval (95% Cl) 1.56-10.47] for the subject near the helicopter airbase, 1.23 (95% Cl 0.40-3.76) for those intermediately exposed to fighter noise, and 4.99 (95% Cl 2.14-11.64) for those highly exposed to fighter noise. Conclusions : The results of the present study suggest that the aircraft noise may have adverse effects on hearing function, cardiovascular health and mental health. Therefore, it seems to be needed to take proper measures including the control of the aircraft noise and the management of the exposed people's health.

• Journal of Technologic Dentistry
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• v.30 no.2
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• pp.121-133
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• 2008

The purpose of this study was to evaluate the role of socioeconomic factors and health behaviors on the prevalence of oral diseases(dental caries and periodontal disease) among Korean adults. Data from the 2005 National Health and Nutrition Examination Survey was analyzed for adults aged over 19 years (n=25,215). Oral disease was defined as disease diagnosed by a dentist for the previous 12 months. Chi-square test and logistic regression analysis were used to conduct statistical analysis. The population without dental caries and periodontal diseases were used as the reference category for all analysis. The overall prevalence of annual dentist-diagnosed dental caries and periodontal diseases were 23.5% and 10.6% respectively. The relative risk of developing dental caries for graduates of middle school and lower were 1.53 times (95% CI: 1.24-1.89) more likely to develop dental caries comparing to college graduates. Low income earners were 1.23 times(95% CI: 1.01-1.49) more likely to develop dental caries than high income earners. Persons covered by national medical insurance were 1.45 times(95% CI: 1.08-1.95) more likely to develop dental caries comparing to persons covered by employee medical insurance. Compared with persons not eating snacks, the risk of developing caries in persons eating snacks once a day was 1.16(95% CI: 1.01-1.32), while those who snacked twice or more a day were 1.19(95% CI: 1.01-1.41). The relative risk of developing periodontal disease was 3.71(95% CI: 2.38-5.80) higher in older individuals than younger. In terms of education level, middle school graduates and lower were 1.54 times more likely to develop periodontal disease than college graduates. Low income earners were 1.47 times more likely to develop periodontal diseases than high income earners. Using data from a large, nationally representative sample of Korean populations, we support the hypothesis that the prevalence of oral diseases is related with socioeconomic factors and health behaviors. More intensive intervention efforts to reduce the prevalence of dental diseases are warranted in Korea.

• Journal of the korean academy of Pediatric Dentistry
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• v.31 no.3
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• pp.459-473
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• 2004

Recently, many children have been treated under sedation in the department of pediatric dentistry of the dental hospital of Kangnung National University, and sedation cases are increasing gradually. So, in this study. the author analyzed and studied about the characteristics of sedated pediatric dental patients and their parents with patient chart and questionnaire at first visit, from 1999 to 2002 for the purpose of making pediatric dental treatment plan more effective and the improvement of behavior management for better pediatric dentistry. The results were follows : 1. The number of total pediatric and sedative patients increased from 1999 to 2002. 2. The sedated pediatric dental patients were younger than total pediatric dental patients(p<0.001). 3. In visit frequency per month, the sedated patients showed higher percentage on March, July, November contrast to non-sedated patients(p<0.001). 4. In parental occupation, there was a significant difference between sedated patients and non-sedated patients(p<0.001). 5. Caries treatment rather than preventive care or orthodontic treatment, was primarily composed of chief complaint of sedated patients(p<0.001). 6. The sedated patients showed worse response to previous treatment than non-sedated patients, and their parents also expected worse response contrast to non-sedated patients (p>0.001). 7. The patients who were introduced, occupied 31.2% of sedated pediatric dental patients and referral by the dentist were composed of the highest percentage(58.3%). 8. In case of uncooperative child at conventional behavior management, the parents of sedated pediatric dental patients prefered to sedation(50.9%). while the parents of non-sedated patients prefered to physical restraint(54.6%) (p<0.001).

• Restorative Dentistry and Endodontics
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• v.36 no.4
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• pp.290-299
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• 2011

Objectives: The usage of fluoride varnish for a moderate to low caries-risk group has not been well validated. This study aimed to evaluate the preventive and therapeutic efficacies of fluoride varnish on the initiated root caries. Materials and Methods: Ten premolars were sectioned into quarters, further divided into two windows, one of which was painted with Fluor Protector (1,000 ppm fluoride, Ivoclar Vivadent). An initial lesion with a well-preserved surface layer was produced by pH cycling. Scanned line analysis using energy dispersive spectrometry determined the weight percentages of Ca and P in the demineralized layer. Scanning Electron microscopy and confocal laser scanning microscopy (CLSM) evaluated the varnish-applied root surfaces. Results: The mean lesion depth (SD) was 12.3 (2.6) ${\mu}m$ (single cycling) and 19.6 (3.8) ${\mu}m$ (double cycling). Double cycling extended the lesion depth, but induced no more mineral loss than single cycling (p < 0.05). The mean weight percentages of Ca and P between groups with and without varnish were not significantly different (p < 0.05). A CLSM showed varnish remained within 15 ${\mu}m$ of the surface layer. Conclusions: When a mild acid challenge initiated root tissue demineralization, the application of low-concentration fluoride varnish did not influence the lesion depth or the mineral composition of the subsurface lesion.

• Journal of Physiology & Pathology in Korean Medicine
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• v.21 no.1
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• pp.199-203
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• 2007

Dental caries is a major worldwide oral disease problem. Streptococcus mutans (S. mutans) plays an important role in the information of dental plaque and it is being noticed as major causative bacteria of dental caries. Therefore, the development of more effective, substantial and safe preventive agents against dental caries is strongly required. In the present study, inhibitory effects of the ethanol extract of the husk of pomegranate (Punica granatum L.) on the growth, acid production, adhesion and water-insoluble glucan synthesis of Streptococcus mutans (S. mutans) were examined. The ethanol extract of pomegranate husk (250 - 4000 ${\mu}$g/ml) significantly lowered the growth of S. mutans in a dose dependent manner. The acid production of S. mutans were inhibited by the presence of ethanol extract of pomegranate husk (500 - 4000 ${\mu}$g/ml) significantly. The ethanol extract of pomegranate husk (5000 - 4000 ${\mu}$g/ml) also significantly lowered the adherence of S. mutans. In water-insoluble glucan synthesis assay, 1000 - 4000 ${\mu}$g/ml of the ethanol extract of pomegranate husk significantly inhibited the formation of water-insoluble glucan. These results suggest that pomegranate husk may inhibit the caries-inducing properties of S. mutans. Further studies are necessary to clarify the active constituents of pomegranate husk responsible for such biomolecular activities.

• Asian Pacific Journal of Cancer Prevention
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• v.14 no.6
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• pp.3785-3792
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• 2013

This study aimed to discover to what extent ethical issues are considered in the reimbursement decision process based on health technology assessment (HTA) in Korea, especially for oncology medications. Public summary documents (PSDs) published by the Health Insurance Review and Assessment Service (HIRA) were analyzed for empirical and normative factors. For external comparison, PSDs presented by corresponding institutions of Australia and the United Kingdom were employed. Furthermore, the opinions of eight expert oncologists were obtained regarding the accountability of the evidence in PSDs. Among 7 oncology drugs, there were differences in the final decisions and empirical factors considered, such as selected comparators and interpretation of evidence between the PSDs from the three institutions. From an ethical viewpoint, the following matters were deficient in the HTA decision-making process for oncology drugs: clear and reasonable standards; identifying and evaluating ethical values; and public accountability for reasonableness about decisions and due process.

• Maxillofacial Plastic and Reconstructive Surgery
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• v.18 no.3
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• pp.428-434
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• 1996

The practice of oral surgery or other dentistry possesses the danger of causing the loss of foreign bodies used within the oral cavity. If such foreign bodies would be lost, they could enter the viscera through the esophagus or tracheobroncheal tree. Ingestion is four times as frequent as aspiration and 80% to 90% of ingested foreign bodies will pass through the body spontaneously. Once the aspiration or ingestion of foreign bodies is happened, a dental procedure should be discontinued immediately. If symptoms of respiratory distress, including coughing, wheezing, or stridor, are present, a patent airway should be maintained, oxygen administered, and ventilation supported if necessary. The PA chest radiograph will identify the objects in the lung, esophagus, or stomach. Ingested gastrointestinal foreign bodies may be managed by observation, endoscopy, and or surgical intervention and aspirated tracheobroncheal foreign bodies may be managed by bronchoscopy, and or surgical intervention. This case report describes the management of ingested or aspirated foreign bodies happened to the three patients during intraoral treatment. we recommend that the preventive method of ingestion or aspiration of the dental foreign bodies should be performed prior to intraoral treatment and the immedieate measures should be carried out after ingestion or asipiration of it.

• The Journal of the Korean dental association
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• v.15 no.8
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• pp.617-621
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• 1977

In order to comparatively observe the salivary cariogenic factors contributing to permanent tooth caries development in each sexes of Korean, the author performed estimation of unstimulated and stimulated salivary flow rates, salivary viscosity test, and salivary buffering capacity test in 50 males and 50 females Koreans aged form the age 20 to 29. Thereafter, the data from the four kinds of caries activity test were analysed and evaluated comparatively. The obtained results were as follows. 1. Unstimulated salivary flow rate for five minutes was 2.2ml in males and 1.7ml in females but the sexual difference was not significant statistically. 2. Stimulated salivary flow rate for five minutes was 7.1ml in males and 4.8ml in females. 3. Salivary viscosity was 1.9 in males and 1.7 in females but the sexual diffrence was not significant statistically. 4. Salivary buffering capacity was 8.5 drops in males and 6.7 drops in females 5. It seems the stimulated salivary flow rate and buffering capacity to be the anti-cariogenic factors in the occurrence of permanent tooth caries in Koreans.