• Journal of dental hygiene science
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• v.17 no.2
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• pp.183-191
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• 2017

The purpose of this study was to evaluate a clinical preventative care program, based on a dental hygiene process (accessment, diagnosis, planning, implementation, evaluation; ADPIE) in a dental clinic, by analyzing patient recognition, knowledge, practice, and satisfaction with respect to oral health. The collected data (in percentages) were analyzed Fisher's exact test and paired t-test using IBM SPSS ver. 21.0 (IBM Co., USA). This study demonstrated a significant difference in oral health knowledge, recognition, and practice before and after the clinical preventive care program (p<0.05). The results were significant in the individual preventive plan within the planning stage, and in the professional teeth cleaning implementation stage (p<0.05). This result can be attributed to the sympathy of the dental hygienist (p<0.05). There was a positive correlation between recommending dental checkups and regular checking of the (r=0.552, p<0.05), undergoing radiography (r=0.434, p<0.01), following an individual preventive plan (r=0.568, p<0.01), undergoing proximal machine teeth cleaning (r=0.437, p<0.05), following tooth brushing instructions (r=0.552, p<0.05), and the evaluation results (r=1.000, p<0.05). Our results demonstrate, that the clinical preventive care program, based on dental hygiene, is an effective program. Given the positive effect of dental revisits and patient recommendations promoting dental hygienists, it is hoped that this preventative program will be widely used.

• The korean journal of orthodontics
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• v.28 no.5 s.70
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• pp.813-823
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• 1998

The frictional force has been considered as an harmful factor in an active unit where tooth movement occurs, but as an advantageous factor in anchor unit that resist tooth movement. That is, efficient tooth movement is planned by using ligation methods that have low levels of bracket-wire frictional force and the anchorage control can be achieved by using ligation methods that have high levels of bracket-wire frictional force that result in binding of the bracket accompanied by little or no tooth movement. The purpose of this study was to evaluate the frictional force generated between bracket and wire in accordance with the methods of ligation, the material of ligation and the passage of time under artificial saliva. Tested were 0.017x0.022 inch stainless steel wires in standard edgewise twin brackets for upper central incisors in a 0.018-inch slot. The wires were ligated into the brackets with elastomeric modules and stainless steel ligatures. Whole tie, half tie, twisting tie and double overlay tie were done with elastomeric modules. With 0.009-inch stainless steel ligature whole tie and half tie were done by needle holder and whole tie by ligature tying plier. With 0.012-inch stainless steel ligature whole ties were done by needle holder. Whole tie groups of elastomeric module were kept in artificial saliva bath at $37^{\circ}C$ for 28 days. The frictional force was recorded by means of an Instron universial testing instrument (4202 INSTRON, Instron Co., U.S.A.) at initial, 7, 14, 21, and 28 days. The results for ligated samples in a simulated oral environment revealed the fellowing : ${\cdot}$In elastomeric module whole tie, 28 days group was significantly greater mean static frictional force than any other group but there were no significant differences among any other group (p>0.05). ${\cdot}$Elastomeric module twisting ties were significantly greater mean static frictional forces than any other ligation method but there were no significant differences between twisting tie and double overlay tie (p>0.05). Twisting tie, double overlay tie, whole tie, half tie showed differences in decreasing order. ${\cdot}$Stainless steel half tie produced lower mean static frictional force than whole tie, ligation by ligature tying plier produced greater mean static frictional force than by needle holder and ligation with 0.012-inch stainless steel ligature produced greater mean static frictional force than with 0.009-inch stainless steel ligature (p<0.05). ${\cdot}$There were no significant differences between the mean static frictional forces of elastomeric whole tie and stainless steel whole tie (p>0.05).

• The Journal of Korean Society for School & Community Health Education
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• v.9 no.1
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• pp.85-97
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• 2008

Objectives: This study was designed to understand the oral health knowledge & conduct of middle-school students, search for the learning objective and the educational method in line with the subjects and of utilizing as the basic data for an effective oral health-care program. Methods: The samples to achieve the purpose of this research are composed of 139 students in middle-school, OO county. Chungcheongbuk-do, the number of male students 64, and female students 75. Data were statistically analyzed by frequency analysis, $x^2$-test or Fisher's exact test by using SPSS WIN Ver. 12.0. Results: Among items on oral-health knowledge in middle-school students. the awareness ratio on a cause and preventive method for oral disease was surveyed to be lower than the awareness ratio on symptoms of oral disease. As a result of examining by comparing knowledge and behavior on the time of tooth brush. both awareness and behavior were the level of 50% or less than it. In particular, 46.2% perceived after lunch. but practice just accounted for 33.0%. The frequency of tooth brush a day was the largest in a case(47.5%) of doing twice a day. However. there was also the response (5.8%) with saying of brushing once or not brushing even once. Thus, the practice of tooth brush was surveyed to be very low even if being a minority of students. The frequency of taking a light meal was 68.8% in less than twice a day. However, even students of taking more than five times were surveyed to be 9.8%. Out of the whole-body health in over 50%-59.9%. the oral health was surveyed to be perceived to be very important. Compared to the awareness level on importance of a tooth, the ratio of visiting a dentistry was analyzed to be very low. Conclusions: The study results suggest that the school oral-health project was examined to have the necessity of being expanded and carried out even in middle-and-high schools, by which the specific oral-health promotion program including oral-health education in this period is developed.

• Journal of dental hygiene science
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• v.12 no.4
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• pp.443-450
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• 2012

In this study, a survey was conducted to check the health status and health-related behavior according to the subjective oral malodor of some university students targeting 1,490 students who are attending N university in Cheonan. Based on the result to confirm the awareness of oral malodor and systemic diseases status, there were many cases to be realized such as sinus infection, chronic rhinitis, asthma, gastrointestinal disorders and xerostama among the people who think that they have bad breath, not the people who think that they don't have bad breath (p<.05). Based on the result to confirm the subjective oral health condition according to awareness of oral malodor status, it was shown that there were more respondents who have some oral conditions such as 'there are tooth to be treated', 'there is food stuck between tooth' and 'the gums are often swollen' among the people who realize that they have bad breath, not the people who think that they don't have bad breath (p<.05). It was shown that there were more cases to be brushed teeth everyday among the people who realize that they don't have bad breath than the people who think that they have bad breath (p<.05) and there were more cases to be used dental floss and to be brushed tongue everyday among the people who think that they don't have bad breath (p<.01).

• Journal of Korean society of Dental Hygiene
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• v.11 no.6
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• pp.1005-1016
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• 2011

Objectives : The purpose of this study was to examine the awareness of mothers on their children's oral health and their concern for that by socio-demographic characteristics and the relationship of their awareness of methods of dental-caries prevention to their practice of the methods. Methods : The subjects in this study were 337 guardians of preschoolers at kindergartens and daycare centers. A self-administered survey was conducted from April 25 to May 27, 2011, and the collected data were analyzed by the statistical package SPSS 18.0. Results : 1.Self-rated concern for children's oral health, 87.7 percent and 12.1 percent replied, "So-so." Whether they were working or not and whether they were mainly responsible for child rearing made significant differences to that(p<.05). 2. As to subjective awareness of their children's oral health, the largest group of the mothers answered "So-so." (44.9%) The second replied that their children were in good oral health(40.5%), and the third group in poor oral health(14.2%). 3. The relationship between self-rated concern for their children's oral health and awareness of methods of caries prevention, statistically significant differences were found according to toothbrushing education and sealant(p<.05). There were no statistically significant differences in practice, but application of fluoride was the least. 4. The relationship between self-rated awareness for their children's oral health and awareness of the preventive methods of caries, there were statistically significant gaps in awareness of toothbrushing education(p<.05). In practice, statistically significant gaps were found in practice of toothbrushing education and sugar-intake restriction(p<.01). 5. In regard to the correlation between awareness and practice of the preventive methods of caries, awareness of all the factors involving toothbrushing education, sealant, application of fluoride and restriction of sugar intake had a significant positive correlation to practice of them. Better awareness led to better practice. Conclusions : In order to ensure children's successful oral health care, more authentic education of how to prevent dental caries should be offered by experts such as dental hygienists and dentists. Especially, detailed information on application of fluoride, restriction of sugar intake and pit and sealant should be provided for mothers to help their children to stay away from dental caries.

• Journal of the Korean Society of Radiology
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• v.13 no.7
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• pp.1025-1033
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• 2019

Although magnetic resonance imaging without linear hardening of CT is recognized as a method of obtaining high contrast of tissue and excellent resolution image in brain disease and head and neck examination, magnetic susceptibility artifact is generated in case of metal implants in the oral cavity, which is an obstacle to image diagnosis. Therefore, an effort was made in this thesis to find a method to reduce artifacts caused by dental implants and prosthesis in MRI. Implant-induced artifacts in magnetic resonance imaging showed that the signal size increased with shorter TE in GE technique and was inconsistent with water temperature change. In SE technique as well, the signal size of water was generally higher than that of air, but the signal to noise ratio (SNR) was not different by air and temperature. In EPI technique, images with fewer artifacts were obtained quantitatively and qualitatively when there was more water than air, and the signal to noise ratio was measured the highest, especially at water temperatures of 20° and 30°. In conclusion, when examining using the EPI technique rather than the SE or the GE technique, obtaining brain diffusion using a 20° and 30° water bag reduces the magnetic susceptibility artifacts caused by implants and prosthesis, suggesting that it may provide images with high diagnostic value.

• Journal of Korean society of Dental Hygiene
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• v.1 no.1
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• pp.1-17
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• 2001

This study was tried to suppose the necessity for the participations of the guardians or parents into dental health educations and for developing an educational program on the control of denial health in order to improve the dental health of handicapped children. For this research, it was investigated by a survey on the actual condition of dental health with an object of handicapped children, and simultaneously by analyzing the relationships between the realities of child's dental caries and guardian's acknowledgments and managements with regard to the dental health of the children. The 209 children and their guardians being in special school for the handicapped were surveyed about the actual conditions of dental health from 15 May to 30 June 2000. 1. The average of DT, MT, FT and DMFT index were 2.46, 0.13, 1.18 and 3.78, respectively. 2. As the parents' educational level (p<0.05) and economical incomes were high, the proportions the DMFT index were low (p<0.05). As the father of the handicapped children had a duty, the DMFT index were lower than the opposite case that the father had no duty. However. in the case of their mother, the presence of the duty has not showed any relationships with the DMFT index. And it was revealed that there was a tendency that the lower age of the parents showed the lower proportions (p<0.05) and index (p<0.001). 3. There was no meaningful differences for the DMFT index in the comparison between the children who can brush themselves or not, even though the children who can brush themselves showed relatively and slightly lower DMFT index than the children who can't do it themselves. 4. More frequent observations on the children's dental conditions by the parent resulted in the lower DMFT index(p<0.01). 5. As the parent had relatively more knowledges about the dental disease. the DMFT index were low. Therefore, as it was considered form these results, the parent should be required more positive participations for the improvement of their children's dental health. For promoting this participations, it must be required the development of educational programs and political services for the parent or guardians in order to improve the attendance into the educations.

• Journal of the Korea Convergence Society
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• v.1 no.1
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• pp.57-67
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• 2010

In this study, perceived oral health survey of factors affecting the level of analysis, and oral disease prevention and oral health improvement program for providing the basic information needed to develop community health promotion and aims at improving the quality of life Placed. The study period, 2010 January 2 to February 22 for adults and Yeungnam area surveyed as follows. Subjective oral condition is very bad as the 40.4% response rate was the highest. There were missing teeth in 41.3%, 61.5% had prosthetic teeth. 57.5% had dental caries, periodontal disease and 38.6% who were not parents to get dentures fitted by petitioner was 41.3%. The level of oral health knowledge, oral health is a good side, the prosthetic teeth and TMJ or no characters were higher than other groups. Oral Health Practice is a good side of the level of oral health status, and prosthetic teeth were the characters each. Eating Patterns is a good side of the level of oral health, dental caries, those who can not or do not have TMJ and the characters were higher than other groups.

• Journal of the korean academy of Pediatric Dentistry
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• v.28 no.3
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• pp.369-373
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• 2001

The congenital missing of mandibular second premolars is among the common dental anomaly in children. When a second premolar is diagnosed as congenitally missed, we should consider many factors influencing the treatment plan such as patient's age, states of roots of 2nd primary molar, degree of crowding, skeletal growth pattern, facial profile, procumbency of the incisor and lower facial height, etc. The mineralization of the second premolars begins in the majority of cases at the age of $2\sim2\frac{1}{2}$ years, but this period varies more widely than those for other permanent teeth. Also, mandibular second premolars show the greatest variations in differentiation and calcification. For this reason, aplasia of this group of teeth cannot be diagnosed at early age and with the same degree of certainty. From the clinical studies with 2 cases and some literature review on late development of second premolars, it could be summarized as follows : 1. The 2 cases showed marked delay in the development of mandibular second premolars. 2. After the crypt formation, the speed of calcification seemed nearly normal, suggesting that the delay was due to differentiation rather than calcification. 3. When one is encountered with similar conditions, it would be desirable to consider the possibility of delayed tooth development.

• Journal of Korean society of Dental Hygiene
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• v.15 no.1
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• pp.39-46
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• 2015

Objectives: The purpose of the study is to investigate the cognition of dental caries prevention by the level of socioeconomic status based on Gallup survey in Korea. Methods: This study was done by Korean Gallup survey in October, 2010. A trained researcher carried out the computer aided telephone interview(CATI) using a structured questionnaire. This study was based on the latest population statistics of resident registration and whole country's phone data base. This survey included 869 selected Korean adults over 19 years old, and they were asked to answer a CATI. The questionnaire consisted of general characteristics of the subjects and socioeconomic factors including age, gender, education level, monthly income, and residential area. Cognition of dental caries prevention was measured by Likert 4 scale including 'much', 'a little', 'rarely', and 'never'. The attitude toward dental caries prevention consisted of daily tooth brushing frequency, experience of oral health education, regular dental checkup, chewing gums(xylitol), regular scaling, and use of oral care devices. Data were analyzed using SPSS 20.0 for frequency analysis, t-test, chi-square test, and one way ANOVA. Cronbach's alpha was 0.462 in oral health concern and attitude. Results: Mean of the frequencies of daily tooth brushing in men was 2.54 times and 2.78 in women. By the comparison to age group, 35-44 years old group had 2.82 times, 19-37 years old group had 2.72 times, and 45-64 years old group had 2.51 times. The level of education and monthly income was proportional to the tooth brushing frequency. Highly educated and higher monthly income group received regular dental checkup within a year and used the auxiliary oral health care devices. Conclusions: This study suggested the relationship between dental caries prevention and socioeconomic status. It is important to provide the low socioeconomic group with the better oral health promotion services in the future.