• Journal of Korean society of Dental Hygiene
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• v.10 no.5
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• pp.841-849
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• 2010

Objectives : This purpose of this study was to examine worker's Dental care utilization patterns and its related factors, to prepare basic data for oral health promotion of workers. Methods : The study subject were 1016 industrial workers from7 working places in Gyung-Sang-Buk Do and Daegu-City. Data for this study was obtained by self-administrated questionnaire. The questionnaire consists of general characteristics, yes or no of dental care utilization before six month, purpose of visit, yes or no of dental disease form the results of dental examination screening before one years, yes or no of and patterns dental care utilization of workers with dental disease, etc. The data was utilized using frequency test and $x^2-test$. Results : Rate of dental care utilization was 40% within six month last, among the general characteristics, it were statistically significant that higher age, married state, bad oral health state, high Work period. Rate of dental disease as a result of their dental examination last was 53.1% among the general characteristics, it were statistically significant that enough economic state, bad oral health state, blue collar work type. Dental care utilization's rate of dental disease as a result of their dental examination last was 48.6% among the general characteristics, it were statistically significant that Enough economic state, higher age, married state, high Work period. Conclusions : In order to promote workers of abnormal opinions to take the medical treatment on their dental diseases later dental examination, it is necessary to educate them consistently for the importance of early medical treatment.

• Journal of Periodontal and Implant Science
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• v.43 no.2
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• pp.72-78
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• 2013

Purpose: The purpose of this study was to compare the phototoxic effects of blue light exposure on periodontal pathogens in both planktonic and biofilm cultures. Methods: Strains of Aggregatibacter actinomycetemcomitans, Fusobacterium nucleatum, and Porphyromonas gingivalis, in planktonic or biofilm states, were exposed to visible light at wavelengths of 400.520 nm. A quartz-tungsten-halogen lamp at a power density of $500mW/cm^2$ was used for the light source. Each sample was exposed to 15, 30, 60, 90, or 120 seconds of each bacterial strain in the planktonic or biofilm state. Confocal scanning laser microscopy (CSLM) was used to observe the distribution of live/dead bacterial cells in biofilms. After light exposure, the bacterial killing rates were calculated from colony forming unit (CFU) counts. Results: CLSM images that were obtained from biofilms showed a mixture of dead and live bacterial cells extending to a depth of $30-45{\mu}m$. Obvious differences in the live-to-dead bacterial cell ratio were found in P. gingivalis biofilm according to light exposure time. In the planktonic state, almost all bacteria were killed with 60 seconds of light exposure to F. nucleatum (99.1%) and with 15 seconds to P. gingivalis (100%). In the biofilm state, however, only the CFU of P. gingivalis demonstrated a decreasing tendency with increasing light exposure time, and there was a lower efficacy of phototoxicity to P. gingivalis as biofilm than in the planktonic state. Conclusions: Blue light exposure using a dental halogen curing unit is effective in reducing periodontal pathogens in the planktonic state. It is recommended that an adjunctive exogenous photosensitizer be used and that pathogens be exposed to visible light for clinical antimicrobial periodontal therapy.

• Imaging Science in Dentistry
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• v.52 no.1
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• pp.33-41
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• 2022

Purpose: This study aimed to evaluate the structural complexity of craniofacial trabecular bone in multiple myeloma by fractal analysis of panoramic and lateral skull radiography, and to compare the fractal dimension values of healthy patients (HPs), pre-treatment patients (PTPs), and patients during bisphosphonate treatment (DTPs). Materials and Methods: Pairs of digital panoramic and lateral skull radiographs of 84 PTPs and 72 DTPs were selected. After application of exclusion criteria, 43 panoramic and 84 lateral skull radiographs of PTPs, 56 panoramic and 72 lateral skull radiographs of DTPs, and 99 panoramic radiographs of age- and sex-matched HPs were selected. The fractal dimension values from panoramic radiographs were compared among HPs, PTPs, and DTPs and between anatomical locations within patient groups using analysis of variance with the Tukey test. Fractal dimension values from lateral skull radiographs were compared between PTPs and DTPs using the Student t-test. Pearson correlation coefficients were used to assess the relationship between the mandible from panoramic radiographs and the skull from lateral skull radiographs. Intra-examiner agreement was assessed using intraclass correlation coefficients (α=0.05). Results: The fractal dimension values were not significantly different among HPs, PTPs, and DTPs on panoramic radiographs or between PTPs and DTPs on lateral skull radiographs (P>0.05). The mandibular body presented the highest fractal dimension values (P≤0.05). The fractal dimension values of the mandible and skull in PTPs and DTPs were not correlated. Conclusion: Fractal analysis was not sensitive for distinguishing craniofacial trabecular bone complexity in multiple myeloma patients using panoramic and lateral skull radiography.

• The Korean Journal of Health Service Management
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• v.7 no.4
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• pp.205-219
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• 2013

Nurses' oral health awareness and oral health status and learn about better oral health care and further explore ways to improve awareness of oral care supplies to patients to oral care can help to establish a basis for is for the sole purpose. Seoul, Gyeonggi, Gyeongsang, Jeolla, Chungcheong located in 228 people in the ICU nurses using a questionnaire on oral health awareness and management behavior were investigated. Using oral hygiene aids to living in a residential home, according to the respondents from the two was significant association (p<0.05), oral hygiene, tooth brushing behavior and the use of aids in the relevance of the educational experience, depending on how brushing brushing, depending on how experienced oral there was significant association with the use products, dental products, depending on the path of tooth brushing training methods used were relevant and significant, depending on the state of your oral health, dental supplies used was associated with a significant (p<0.05).

• Journal of Korean society of Dental Hygiene
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• v.13 no.5
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• pp.787-795
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• 2013

Objectives : The aim of the study is to investigate the possible influences of health behaviors and oral symptoms on subjective oral health status and to provide basic data for the development of oral health education programs. Methods : Subjects were 274 nursing home workers in Jeollabukdo, Korea. A self- reported survey was carried out. Results : Eighty four persons (30.7%) subjectively perceived their subjective oral health was good in the meanwhile forty nine persons (17.9%) reported poor oral health status. Health behaviors had much influence on their subjective oral health status. Good subjective oral health status coincided with quitting od smoking and drinking alcohol. Periodontal diseases and dental caries, and tooache had bad influences on subjective oral health status. Conclusions : Quitting program for smoking and drinking alcohol will make the nursing home workers in good healthy oral health status.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.35 no.6
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• pp.420-425
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• 2009

Purpose: The aim of this study is to analyze the correlation between incidence of mandibular angle fracture and eruption state of mandibular third molar using clinical and radiographic findings. Materials and Methods: The data were obtained from the clinical and radiographic records of 205 patients who visited the Department of Oral and Maxillofacial Surgery, Chonbuk National University Hospital for treatment of the mandibular fracture. Panoramic radiographies were taken for radiographic examination and the mandibular third molars were classified according to age, gender, position and eruption state. Data were analyzed by a chi-square statistics. Results: In this study, the incidence of mandibular angle fracture had a tendency to be greater when a mandibular third molar was present(p>0.05), but there was not a statistically significant difference. Of the 255 cases with a mandibular third molar, 67 had an angle fractures. Of the 155 cases without a mandibular third molar, 138 had not angle fracture. And the incidence of mandibular angle fracture was high at class BII(by Pell & Gregory system)(p<0.05). Conclusion: Although there was not a statistically significant difference, mandibular third molar was more susceptible to mandibular angle fracture. When the reduction of mandibular angle fracture, it was recommended that mandibular third molar should be extracted especially in case of pericoronitis, periodontitis and other infections.

• Imaging Science in Dentistry
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• v.51 no.1
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• pp.91-92
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• 2021

• Journal of Korean society of Dental Hygiene
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• v.9 no.4
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• pp.606-619
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• 2009

Objectives : This study was to examine the state of customized visiting oral health programs in a bid to help facilitate the unified operation of the programs and the development of required guidelines. Methods : The subjects in this study were 49 dental hygienists who were professionals responsible for customized visiting health care programs across the nation. Results : 1. Regarding the form of employment of the dental hygienists were investigated many contract and daily workers. 2. As to the possession of equipment necessary for visiting oral health programs, denture cleaners(12.2%) were most widely possessed in some regions, followed by mobile scalers(10.2%) and mobile suctions(8.2%). In terms of expendable devices and materials, dental mirrors, pincettes and explorers were the most widely possessed dental checkup devices, and the most widely possessed oral hygiene supplies were toothbrushes, interdental brushes and denture cleaners. Those devices and materials were in more possession than the other types of devices and materials. The most widely possessed equipment for educational purpose was laptop computers, followed by beam projectors and screens. The most widely possessed teaching materials were dentiform, followed by CD-ROMs. 3. Those whom they visited the most for oral health care service were elderly people, followed by the disabled and patients with chronic diseases. The dental hygienists who went out to visit those people outnumbered the others who stayed at public health centers. Concerning the types of visiting oral health care service, the most prevalent service provided to the elderly included denture cleaning/management, oral massage and preventive treatment against dental caries. The most dominant service provided to the disabled involved education of the oral health care act, preventive treatment against dental caries and toothbrushing by professionals. The most common service offered to patients with chronic diseases was education of the oral health care act and oral health education. The dental hygienists paid a visit to a mean of 5.8 households a day. The average weekly number of households cared by the dental hygienists was 27.3. It took a mean of 37.1 minutes for them to take care of each household. 4. As for satisfaction level with the implementation of the visiting oral health programs, they expressed the greatest satisfaction at teamwork with professionals($3.56{\pm}0.94$), followed by the professionalism of their work($3.21{\pm}0.94$) and workload($3.08{\pm}0.94$). Their satisfaction level with the work conditions required for creative job performance($2.75{\pm}0.98$) and partnership with other institutions($2.64{\pm}1.03$) was below 3.0. In regard to the impact of their characteristics, marital status made a statistically significant difference to satisfaction level with workload. The unmarried dental hygienists were more pleased with their workload than the married ones(p<0.05). 5. As to needs for education for professionalism improvement, they asked for education about visiting oral health care skills the most, followed by education about oral health care for patients with chronic diseases, education of planning/evaluation and education of oral health care for the disabled. Conclusions : The top priority for the vitalization of the programs was the procurement of budget, followed by the procurement of equipment and educational media and the procurement of human resources.

• Journal of Korean society of Dental Hygiene
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• v.12 no.1
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• pp.17-26
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• 2012

Objectives : The purpose of this study was to evaluate the actual state of oral health behaviors of Chinese students studying in Korea to promote their oral health and provide useful reference materials for expanding dental care services and improving relevant systems. Methods : This research was based on self-filling survey which 413 chinese students in Chungbuk in Korea from April 1 to July 15, 2011. Surveyed data were analyzed by descriptive statistics, $x^2$-test, t-test and one-way ANOVA using SPSS WIN 12.0 program and its signification level was 0.05. The following shows the results of this study. Results : In the event of those who didn't use oral hygiene supplies, the largest group didn't use the devices since they didn't know about them well or they didn't need to use. Regarding links between experience of using oral hygiene devices and concern for oral health, those who used oral hygiene devices showed more interest in oral health(p<.001). Conclusions : Accordingly it now is required to develop a more specific and systematic oral health program and to offer administrative assistance for foreign students during their stay in Korea.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.34 no.6
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• pp.640-643
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• 2008

Distal caries of the second molar is common indication for the mandibular third molar surgery and there are no universally acceptable predictive criteria for distal caries of the second molar. To analyze the correlation of the distal caries of the second molar and the eruption state of the mandibular third molar using panoramic radiographs statistically and propose the acceptable guideline for preventive extraction of the mandibular third molar. 786 patients who were extracted the mandibular third molar from 2002 to 2006 at Samsung medical center were examined. The presence and absence of distal caries of mandibular second molar, age, gender, angulation, impaction degree, distance between distal cementoenamel junction of the second molar and mesial cementoenamel junction of the mandibular third molar were assessed. 79.6% of third molars had a mesial angulation of between $40^{\circ}$ and $80^{\circ}$. The mean age of third molar removal for distal caries of second molar was $33.86{\pm}9.81$. The prophylactic removal of a mesio-angular third molar about $40^{\circ}$ and $80^{\circ}$ could prevent distal cervical caries forming in the mandibular second molar.