• 한국학교ㆍ지역보건교육학회지
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• 제20권3호
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• pp.83-90
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• 2019

Purpose: This study is a repetitive comparative analysis of a qualitative case study that carried out a home visiting oral health education program. Method: This study conducted an interview survey through medical examination by interview before and after the home visiting oral health education and measured some pathogenic microorganism counts in the denture. Results: There was a positive change in the self oral care ability of the elderly at home after home visiting oral health education, including the behavior of self management of dentures, and some pathogenic microorganism counts in the dentures. Conclusion: The home visiting oral health education of home care service centers can improve oral health care for the elderly at home.

• 대한치과보철학회지
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• 제34권1호
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• pp.151-167
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• 1996

Temporary soft liners can be used to prevent chronic soreness from dentures or to aid in its treatment are as adjuncts in tissue conditioning, for temporary obturators, and to stabilize baseplate or surgical stent. The purpose of this study was to evaluate the shock absorption properties of several temporary soft denture liners using a free drop test with an accelerometer. The materials tested inclued Coe-comfort, Softone, Tissue conditioner and Viscogel. The specimens were fabricated with the thickness of 1, 2, 3mm and were stored in distilled water at $37^{\circ}C$ for a day, 1, 2, and 3 weeks. Six samples were made with each material for each test condition and the shock-absorbing behavior was evaluated according to material, thickness and duration. The results were as following : 1. Softone of 3mm thickness stored for a day showed the most excellent shock absorbability. 2. The shock absorbing behavior of duration according to materials and thickness showed a day to be the highest and decreased in 1 week, 2 weeks and 3 weeks in that order(p<0.05). And there was no significant difference between durations in Tissue conditioner. 3. The shock absorbability of thickness according to materials and duration showed 3mm to be highest and decreased in the order of 2mm, 1mm(p<0.05). 4. In comparison of the shock absorbability of temporary soft denture liners according to thickness, there was statistically significant difference between Softone and Visocgel, Tissue conditioner, Coe-comfort / Viscogel and Tissue conditioner, Coe-comfort in 1,2mm thickness, and between Softone, Viscogel and Tissue conditioner, Coe-comfort in 3mm thickness (p<0.05).

• 대한치과보철학회지
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• 제43권6호
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• pp.717-726
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• 2005

Statement of problem. One of the common problems of provisional crown and fixed partial denture materials is that when they are subjected to constant loads for a long period of time, they exhibit a dimensional change (creep). Purpose. The aim of this study was to investigate the viscoelastic behaviour of polymer-based provisional crown and fixed partial denture materials with time at constant compressive load. Material and methods. Three dimethacrylate-based materials (Protemp 3 Garant, Temphase, Luxatemp) and one monomethacrylate-based material (Trim) were selected. Dimensional changes of the specimens were recorded by a LVDT to evaluate their viscoelastic behavior and creep strain. For all specimens, two loading procedures were used. At first, static compressive stress of 4 MPa was applied for 30 minutes and followed by 1 hour of strain recovery. Then, after 24 hours of water storage, the specimens were loaded again. The creep values between materials were statistically analyzed using one-way ANOVA and multiple comparison $Scheff\acute{e}$ test. Independent samples t-test was also used to identify the difference of creep strain between first and secondary loading conditions at the significance level of 0.05. Results. Following application of the first loading, Trim showed the highest maximum creep strain (32.7%) followed by Luxatemp, Protemp 3 Garant and Temphase, with values of 3.78%, 2.86% and 1.77%, respectively. Trim was significantly different from other materials (P<0.05), while there were no significant differences among Luxatemp, Protemp 3 Garant and Temphase (P>0.05). The highest recovery and permanent set of Trim, were significantly different from those of others (P<0.05). At the secondary loading of the dimethacrylate-based materials, creep deformation, recovery and permanent set decreased and the percentage of recovery increased, while in Trim, all values of the measurements increased. This result showed that the secondary loading at 24 hours produced a significant creep magnitude. Conclusion. The dimethacrylate-based provisional crown and fixed partial denture materials showed significantly higher creep resistance and lower deformation than the monomethacrylate-based material. Thus, monomethacrylate-based materials should not be used in long-term stress-bearing situations.

• 한국치위생학회지
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• 제16권2호
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• pp.233-240
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• 2016

Objectives: The aim of this study was to evaluate the oral health status and behavior in Korean diabetic adults. Methods: The study subjects were 11,840 adults who participated in the fifth Korea National Health and Nutrition Examination Survey(2010-2012). Diabetic status was defined by doctors and fasting blood sugar(FBS) level. Oral health status was assessed by decayed-missing-filled teeth(DMFT), community periodontal index(CPI), periodontal disease, denture needs, limitation of oral function, and chewing difficulty. The oral health behavior was evaluated by oral examination within a year, brushing times a day, and use of auxiliary oral product. The data were analyzed by descriptive analysis, chi-square tests and multiple logistic regression analyses. Results: The prevalence rate of diabetes mellitus diagnosed by doctor and FBS was 8.3% and 10.2%, respectively. The prevalence rate of periodontitis was 25.4%. The proportions of $DMFT{\geq}20$, $CPI{\geq}3$, periodontal disease, denture needs, oral function limitation and chewing difficulty in the confirmed diabetic group by doctor were significantly higher than those of the non-diabetic group(p<0.05). In multiple logistic regression analysis, the adjusted odds ratio(aOR) for periodontal disease(aOR=1.73, 95% CI=1.41-2.12), presence of denture needs(aOR=1.40, 95% CI=1.06-1.84), limited oral function(aOR=1.43, 95% CI=1.15-1.78) and chewing difficulty(aOR=1.41 95% CI=1.13-1.77) in diabetic subjects were significantly higher than those of the non-diabetic subjects. There were similar associations between diabetes defined with FBS and oral health. In oral health behavior, diabetic subjects had significantly lower odds ratios for oral examination(aOR=0.76, 95% CI=0.60-0.98), brushing time ${\geq}2$ times(aOR=0.73, 95% CI=0.57-0.93), and auxiliary oral products(aOR=0.74, 95% CI=0.59-0.94). Conclusions: There was a significant relationship between oral health status and behavior in Korean diabetic adults. Further study is needed to evaluate the underlying mechanisms between diabetes mellitus and oral health status.

• 한국치위생학회지
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• 제13권6호
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• pp.1023-1030
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• 2013

Objectives : The purpose of the study is to investigate the relationship between variables associated with oral health status in psychiatric patients and to provide basic information on oral health education program development for the psychiatric patients. Methods : Subjects were 151 psychiatric patients who filled out the structured questionnaire. The data were analyzed for independent t-test, one-way ANOVA and hierarchical multiple regression by using SPSS Win Program 18.0 version. Results : Higher DMFT index was shown in the older age(p<0.001) and low perceived oral health group(p<0.001). Higher DMFT index included no tooth brushing after breakfast(p=0.045), wrong tooth brushing method(p<0.001). Chewing discomfort(p=0.027) and denture(p=0.027) were closely related to higher DMFT index. Bread(p=0.033) and snack(p<0.001) increased DMFT index. Factors affecting oral health status were age, denture, snack and bread. The explanation power of the final model was 29.4%. Conclusions : Dietary control for the psychiatric patients is very important to prevent dental caries. Tooth brushing and use of oral hygiene devices can improve good oral health care. Furthermore, this result can improve the oral health care for the disabled people.

• 한국치위생학회지
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• 제9권4호
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• pp.836-848
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• 2009

Objectives : This study was conducted to evaluated the subjective oral health state related periodontal disease of elderly people. Methods : Data were collected through the National Health and Nutrition Survey in 2005. Participants consisted of 1,091 elderly people above 65 years old. Independent variables in the survey were social characteristic, health behavior, oral health condition, oral health management. The data were analyzed by using the SPSS 12.0. Results : The more elderly people of 69.0% recognized own oral health as is not healthy, elderly people of 74.0% recognized own oral health as is not healthy about subjective oral health and a lot of stressed(82.8%) has felt highly about periodontal disease(p<0.001). Respondents of have a sound teeth(58.9%), have a lower denture(75.0%) and have a no problem in mastication(74.5%) has felt highly about periodontal disease(p<0.001). Elderly people recognized own oral health as is not healthy about subjective oral health were 0.316 times(p<0.01), elderly people recognized own oral health as is common healthy about subjective oral health were 0.241 times(p<0.001), a lot of stressed were 1.410 times has felt highly about periodontal disease. Elderly people of have a lower denture were 1.159 times, have a upper denture were 1.159 times, have a lower and upper denture were 0.464 times has felt highly about periodontal disease(p<0.05). Also respondents of have a no problem in mastication were 7.464 times compared with problem in mastication(p<0.001). Conclusions : Quality of life from disease of Korean elderly people can be fallen, and improve quality of life that medical treatment is healthy numerical value state numerical value state. Study's findings of above may be used to inform the importance of health numerical value state while establish dental health policy that is string.

• 대한치과보철학회지
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• 제32권3호
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• pp.411-430
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• 1994

The denture may be fractured accidentally by an impact while outside the mouth, or may be cracked or broken while in service in the mouth. The latter is generally a fatigue failure caused by repeated flexure over a period of time. This investigation compared the flexural fatigue resistance, the impact force and the transverse strength of two denture base materials with and without the grid strengthener, the T300, the T800 and the Kevlar fiber to evaluate the fracture resistance. The distribution and behavior of fibers across fracture lines were examined by Hi-Scope Compact Microvision System. Through analyses of the data from this study, the following conclusions were obtained. 1. The flexural fatigue resistance, impact strength and transverse strength of high impact strength resin were higher than those of conventional heat polymerizing resin, but statistically there was no significant difference(p>0.05). 2. All specimens with and without the grid strengthener did not show significant differences in the flexural fatigue, the impact and the transverse strength test(p>0.05). 3. All specimens reinforced with the T300, the T800 and the Kevlar fiber showed significant increase of the fatigue resistance and the impact force(p<0.05). 4. All specimens reinforced with the T800 and the Kevlar fiber showed significant increase of the transverse strength(p<0.05). 5. All specimens reinforced with the T300, the T800 and the Kevlar fiber exhibited greenstick fractures. The fibers tended to remain enveloped in the resin, resisting pull-out.

• 한국콘텐츠학회논문지
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• 제14권4호
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• pp.237-242
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• 2014

본 연구의 목적은 저탄성계수 Ti-30Ta 합금에 Zr 원소를 첨가하여 표면 특성 및 부식 거동을 조사하였다. 저탄성계수 Ti-30Ta-xZr(x : 3, 7, 15 wt %)합금은 아크 멜팅기로 제조하였고, 아르곤 분위기에서 $1000^{\circ}C$ 24시간 동안 열처리하였다. 합금의 미세구조는 FE-SEM 그리고 XRD를 이용하여 조사하였다. 전기화학적 특성은 시편 작업전극, 고밀도 탄소 보조전극 그리고 포화칼로멜 기준전극의 통상적인 3상을 이용하여 수행하였다. Ti-30Ta-xZr 합금의 분극 거동 결과, 균질화 처리된 Ti-30Ta-15Zr 합금의 부동태 전류밀도가 다른 합금에 비해 낮았다.

• 한국치위생학회지
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• 제15권3호
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• pp.443-450
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• 2015

Objectives: The purpose of the study is to identify the relationship between happiness, subjective oral health condition and oral health behavior in Korean elderly people. Methods: A self-reported questionnaire was completed by 487 elderly people using facilities for the senior citizens in Gyeonggi-do from January 3 to November 28, 2014 by convenience sampling method. The questionnaire consisted of demographic characteristics of the subjects, subjective oral health status, oral health behavior, and happiness. Cronbach'a alpha in the happiness was 0.734 in the study. Results: Happiness was closely correlated with abscence of subjective periodontal diseases, dental fillings, and denture. The number of toothbrushing and dental health education had also influenced on happiness. Conclusions: In order to improve the quality of dental health in the elderly, it is necessary to develop a multilateral systematic dental health promotion program by Ministry of Health and Welfare.

• 융합정보논문지
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• 제10권12호
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• pp.191-200
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• 2020

본 연구는 노인들의 교육과 소득정도에 따른 구강건강상태 및 관리행태와 치과이용행태를 파악하여, 노인구강건강 증진에 대한 정책과 제도를 마련하기 위한 근거자료를 제시하고자 실시하였다. 자료조사는 2019년 8월 19일부터 2019년 10월 25일까지 대전지역에 거주하는 노인 224명을 대상으로 실시하였으며, 수집된 자료는 chi-square test와 logistic regression analysis 등으로 분석하였다. 그 결과 구강건강상태 및 관리행태는 틀니사용, 임플란트사용, 구강위생용품사용, 구강보건교육경험, 구강건강관리방법에서 교육과 소득정도에 따라 유의한 차이를 보였다. 치과이용행태도 교육과 소득정도에 따라 유의한 차이를 보였으며, 연령, 교육 정도, 임플란트사용 여부, 치과이용의 주된 이유가 치과이용에 영향을 미치는 요인으로 나타났다. 이에 본 연구를 토대로 교육 및 소득정도를 고려한 국가적 차원의 제도적 방안이 마련되어 노인들의 구강건강의 삶의 질이 향상될 수 있기를 기대한다.