• Journal of radiological science and technology
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• v.34 no.1
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• pp.27-33
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• 2011

Along with the developments of science technology, up-to-date medical radiation equipments are introduced. Those equipments has brought many progresses in diagnosing patients not only in the quantitative aspects but in the qualitative ones. Especially, in the case of dental radiography, patients can be exposed more than CT, cone beam computed tomography (CBCT). In this study, we used human phantom and TLD-100H to measure the organ dose in each dental radiography and computed the effective dose according to ICRP (International Committee for Radioactivity Prevention) 60, 103. We measured the effective dose to be 5.1 and $29.5{\mu}Sv$ in the panoramic radiography and 11.2 and $14.4{\mu}Sv$ in the cephalometric radiography respectively. We also executed the CBCT and CT test on the maxillaries and the mandibles and found the amounts of effective dose were 53.7, 209.6, 129, and $391.5{\mu}Sv$ respectively in the CBCT and $93.3{\mu}$, 139.5, 282.7 and $489.7{\mu}Sv$ in the CT test. Consequently, it was shown that the effective dose in the CBCT test was lower than one in the CT test, but was higher in both panoramic and cephalometric radiography.

• Journal of dental hygiene science
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• v.1 no.1
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• pp.46-52
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• 2001

The purpose of this study was to examine dental personnels' concern for health, their personal protection manner, and whether or not they were inoculated against hepatitis B and made an inquiry of patients about that. It's ultimately meant to serve as a basis for the preparation of an anti-infection guide for the protection of dental personnels against all sorts of infectious diseases. After a survey was conducted from March 29 through May 9, 2001, the following findings were obtained: (1) The dental personnel group that had worked for 5 to less than 7 years took health examination the most, with 71.4%, before joining the hospital, and 61.5% of those who had served for 9 years or more, the greatest percentage, took medical checkup after joining the hospital(P<0.05). (2) The largest percentage of being inoculated against the anti-B type hepatitis after employment was 71.4% of the dental personnels over 35, and 57.7% of those with 9-year or more working experiences. Therefore, their age and service term made a significant difference(P<0.05). (3) There was no significant gap in personal protection practices between the dental hygienists and nurse aids(P>0.05). But the use of safety goggles for treatment was not properly done, with just 1.48 on the basis of 3 points, whereas the use of mask was scored 2.40 and the use of gloves was scored 1.96. (4) After a narcotic was used once, the leftovers were wasted by 89.7% of the dental hygienists and 70.0% of the nurse aids. More dental hygienists wasted them(P<0.05). (5) For hand washing, antibiotic liquid soap was used by 19.3% of the dental hygienists and 10.0% of the nurse aids, which were both very low percentage. And just 37.2% of the dental hygienists utilized a disposable paper towel to dry their hands, and only 36.0% of the nurse aids used the same(P<0.05).

• Journal of dental hygiene science
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• v.11 no.1
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• pp.7-14
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• 2011

This paper aims to comprehend the career plan and job view of the students of Dept. of Dental Hygiene who are expected to graduate with a bachelor of science degree, explain the characteristics of their jobs after graduation, compare them with the graduates of associate of science degree and finally give a basic data necessary for developing careers in the future. From the survey of 184 would-be graduates of Departments of Dental Hygiene at 6 universities that produce dental hygiene graduates in 2011 and 251 would-be graduates with a A.S. degree of Dept. of Dental Hygiene, whose course takes 3 years, this paper reaches the conclusion below. More graduates with B.S. degree in dental hygiene than those with a A.S. degree want to attend graduate school after graduation. It is found that most of the graduates with B.S. degree in dental hygiene wanted to work as a dental hygienist until they reach retirement age after getting a job. They favor dental hospitals, which give them a higher salary and ensure them of retirement age. They have a lower-esteemed job view: they think that their jobs are socially lower regarded, compared with graduates with a A.S. degree. It is found that those who wish to attend graduate school have lower job satisfaction than those who want to get a job after graduation. It is necessary for the educational institutes of dental hygiene to teach their graduates have a positive attitude their job and for the association to make an active effort to increase the job satisfaction of dental hygiene students as well as dental hygienists by enhancing social recognition of a dental hygiene.

• Journal of dental hygiene science
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• v.6 no.4
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• pp.271-276
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• 2006

This study set out to analyze the relationships between the senior citizens' dental health activities and dental health conditions, to provide basic data to develop a program for their better dental health, and finally to search for the ways to improve their life quality through dental health care. The subjects were 142 senior citizens(58 were male and 84 were female) who were 65 years old or older and visited a dental hospital or clinic in the Seoul metropolitan area from April 17 to April 28, 2006. With the cooperation from the dentists, the investigators examined their dental conditions and conducted one-on-one interviews to collect the information about their demographic characteristics, dental health activities, and subjective dental health conditions. The collected data were analyzed with T-test, ANOVA and Pearson's correlation coefficient using the SPSS WIN 11.5 program. The analysis results were summarized as follows: First, 58 men(40.8%) and 84 women(59.2%) consisted of the subject group, where percentage of the female participants was bigger Those who were aged from 65 to 69 made the biggest age group in the subjects, accounting for 58.5% with 83. Second, those who had three dental caries or less and then didn't treat them or treated them(F) accounted for the biggest percentage with 117(82.4%) and 72(50.7%) respectively. As for the remaining teeth, the biggest number of them(40 subjects, 28.2%) had three or less remaining. Third, it turned out the female subjects had a higher level of dental health activities than their male counterparts(P = 0.00). As for living expenses, those who were paid salary or earned income themselves carried out their dental health activities in a higher level than those who lived on the benefit from the government(p = 0.02). Fourth, the subjects' subjective dental health conditions had negative correlations with their dental caries not treated. And there were positive correlations between their dental caries not treated and dental caries lost and between their dental caries treated and remaining teeth. Fifth, those subjects who earned their living expenses themselves had the most dental caries treated at 5.4(p = 0.02), and there was statistically significant difference with the numbers. Sixth, those subjects who brushed their teeth in their own manner had 11.8 teeth lost(p = 0.05), which was more than the number of those who brushed their teeth in other methods. And there was statistically significant difference among them. The remaining teeth were found most at 17.3(p = 0.00) among those who brushed their upper and lower teeth separately. In addition, those who visited the public health center often had significantly more teeth treated(4.3) than others(p = 0.00).

• Journal of radiological science and technology
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• v.39 no.4
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• pp.509-516
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• 2016

A dental panoramic radiography which usually uses low level X-rays is subject to the Nuclear Safety Act when it is installed for the purpose of education. This paper measures radiation dose and spatial dose rate by usage and thereby aims to verify the effectiveness of radiation safety equipment and provide basic information for radiation safety of radiation workers and students. After glass dosimeter (GD-352M) is attached to direct exposure area, the teeth, and indirect exposure area, the eye lens and the thyroid, on the dental radiography head phantom, these exposure areas are measured. Then, after dividing the horizontal into a $45^{\circ}$, it is separated into seven directions which all includes 30, 60, 90, 120 cm distance. The paper shows that the spatial dose rate is the highest at 30 cm and declines as the distance increases. At 30 cm, the spatial dose rate around the starting area of rotation is $3,840{\mu}Sv/h$, which is four times higher than the lowest level $778{\mu}Sv/h$. Furthermore, the spatial dose rate was $408{\mu}Sv/h$ on average at the distance of 60 cm where radiation workers can be located. From a conservative point of view, It is possible to avoid needless exposure to radiation for the purpose of education. However, in case that an unintended exposure to radiation happens within a radiation controlled area, it is still necessary to educate radiation safety. But according to the current Medical Service Act, in medical institutions, even if they are not installed, the equipment such as interlock are obliged by the Nuclear Safety Law, considering that the spatial dose rate of the educational dental panoramic radiography room is low. It seems to be excessive regulation.

• Clinical and Experimental Pediatrics
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• v.45 no.2
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• pp.166-173
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• 2002

Purpose : The aim of this study is to find out the distribution of illness, patterns of medical care utilization and factors determining medical care utilization in elementary school children. Methods : We performed the questionnaires in Gwangju city on 2,036 children of two elementary schools from June 1 to June 30, 1998. Results : The prevalence rate of illness was 32.3%. The distribution of illness was respiratory disease(64.7%), gastrointestinal disease(12.8%), injury & poisoning. The rate of persons having received medical treatment when they were sick, was 89.8%. The selection distribution among various medical facilities was pediatric hospital(46.7%), otolaryngologic hospital(19.8%), pharmacy (13.2%) and internal medicine in the decreasing frequency sequence. The major factors influencing the selection of medical facility were geographic accessibility and good results. The most common reason for the first visit to the pediatric hospital was geographic accessibility. The most common reason for a visit and to otolaryngologic hospital was a good result. The most frequently utilized medical facility for respiratory symptoms and gastrointestinal symptoms was pediatric hospital. The persons influencing the selection of medical facility in the children were mother(73.3%), father( 10.8%), doctor and others in decreasing sequence. The persons answering the questionaire thought that the optimal age of pediatric care was from 0 to 12 years(47.8%), to 10 years(22.4%) and to 15 years(18.5%) in decreasing rate. Conclusion : Other departments instead of pediatrics have treated children. Children have particular growth and development process, which is different to those of adults. So, it is necessary to choose special medical care and adequate medical facilities for children.

• Journal of dental hygiene science
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• v.9 no.4
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• pp.443-451
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• 2009

The purpose of this study was to examine the views of dental hygiene students about the possible countermeasure of domestic hospitals for the opening of the medical market. The subjects in this study were 269 dental hygiene sophomores, juniors and seniors at two different colleges in the region of Busan. The findings of the study were as follows: The opening of the medical market and views of possible countermove, whether they agreed to that or not made a statistically significant difference to their opinions on the necessity of customer-oriented marketing strategy(p=0.023), analysis of foreign medical markets/attempt to make inroads into the markets(p<0.000) and the improvement of the quality of medical services/the diversification of the services(p=0.025). As to an intention of going to a foreign hospital, they had a statistically significantly different intention about whether to go to a foreign hospital regardless of medical bills(p<0.000), whether to consult a doctor in a foreign hospital after going to a domestic hospital first (p<0.000), whether to consider the distance between their houses and a foreign hospital(p=0.05) and whether to take considerations on the assistance of an interpreter(p=0.023). In regard to preference for foreign hospitals, American hospitals ranked first(41.9), followed by Australian hospitals(19.9) and Canadian ones(14.2).

• The korean journal of orthodontics
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• v.38 no.3
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• pp.202-213
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• 2008

Objective: The purpose of this study was to compare the cephalometric measurements of obese and non-obese Korean male patients with obstructive sleep apnea syndrome (OSA). Methods: Eighty-seven adults who had visited the Sleep Disorder Clinic Center in Keimyung University, Daegu, Korea were examined and evaluated with polysomnography (PSG) and lateral cephalogram. They were divided into 4 groups (non-obese simple snorers, obese simple snorers, non-obese OSA patients, obese OSA patients) according to AHI (Apnea-Hypopnea Index) and BMI (Body Mass Index). Results: The obese OSA group had the highest AHI among the 4 groups. The non-obese OSA group had a significantly steeper mandibular angle and shorter tongue length than the obese OSA group. The hyoid bone of the obese OSA group was positioned anterior and inferior as compared with the non-obese OSA group. Multiple regression analysis showed that tongue length in the obese OSA group and retroposition of hyoid bone in the non-obese OSA group were significant determinants for the severity of AHI. Conclusions: From a cephalometric point of view, the obese and non-obese pateints with OSA may be characterized by different pathogeneses. Therefore, they have to be managed by individualized treatment. For the obese OSA patients, weight control must be advised as a first choice and for the non-obese OSA patients, oral appliance, nasal CPAP, UPPP and others could be chosen according to the obstructive sites.

• Journal of the korean academy of Pediatric Dentistry
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• v.29 no.4
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• pp.539-554
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• 2002

To identify the trend of pediatric dentistry in USA and Japan, closely related to Korean pediatric dentistry. The Japanese Journal of Pediatric Dentistry(JJPD) and The Journal of the American Academy of Pediatric Dentistry(PD) were reviewed. We collected the bibliographical data of the articles published in the two journals from 1991 to 2000. We analyzed thematic distributions and chronological changes, and then compare those of two groups. The following results were obtained: 1. The 869 articles were published in JJPD and 672 in PD. This was about 30% more in JJPD. 2. In both JJPD and PD, the case reports were a quarter of scientific articles in quantity. 3. The studies on the systemic diseases had the highest proportion in both JJPD and PD. The studies on the dental caries and restorative materials also had high proportion in both journals. 4. The studies on the sedation and biochemical survey had high proportion in PD when had low proportion in JJPD. To the contrary, The studies on the behavior science in JJPD were about double of those in PD. 5. There was no statistically significant difference in quantity between JJPD and PD in the studies on the dental caries, prevention of dental caries, community dental survey, conservative treatment, restorative materials, pulp treatment, diagnosis and treatment of malocclusion, oral pathology and minor surgery, local anesthesia and nerve tissue, traumatic injuries. 6. There was statistically significant increase in the studies on the dental equipment in JJPD and in those on restorative materials in PD. 7. There was statistically significant decrease in the studies on the prevention of dental caries and local anesthesia and nerve tissue in JJPD, and those on conservative treatment in PD.

• Journal of Oral Medicine and Pain
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• v.38 no.1
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• pp.19-28
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• 2013

With Korea's rapid entry to aged society, elderly population has become a major age group both in the whole society and medical field and its importance will be constantly stressed out. Elderly population is also important in the field of oral medicine which deals with chronic and recurrent diseases in the orofacial region of non-dental origin but there exist few studies indicating epidemiology of elderly patients in this regards. This study aimed to investigate change of age distribution of new patients in a university-based dental hospital and oral medicine clinic for last decade and to investigate clinical epidemiology of elderly patients (${\geq}$ 65 years) of oral medicine clinic. This study was performed retrospectively using medical records of the new patients in Dankook University Dental Hospital in 2001 and 2011. According to the study, percentage of elderly new patients increased in both dental hospital and oral medicine clinic and degree of the increase was greater in oral medicine clinic than in the whole hospital (p=0.000). 13.5% of adult patients ${\geq}$ 18 years of oral medicine clinic were elderly patients ${\geq}$ 65 years. 83% of elderly patients were suffering from one or more systemic diseases. Although TMD was the most common reason for elderly patients who visited oral medicine clinic, oral soft tissue diseases, dry mouth, burning mouth syndrome and oromandibular dystonia was more frequently diagnosed in elderly patients compared to adult patients aged 18 to 64 years. Pain severity and interference of Brief Pain Inventory and depression and anxiety scores of Hospital Anxiety Depression Scales were higher in elderly patients than in the adult patients (p<0.05). Increase of elderly patients with chronic oral diseases and pain needs more attention of dentists and specialists of oral medicine to improvement of assessment and development of tailored management because large portion of the elderly patients have systemic diseases, polypharmacy and impaired communication, possibly restricting treatment options.