Laser와 불소를 이용한 상아질표면처리에 관한 주사전자현미경적 연구

양정승,김동기 대한구강보건학회 1995 大韓口腔保健學會誌 Vol.19 No.3

잇솔의 특징이 탄력손실도에 미치는 영향

양정승,임선아,성진효,김동기 대한구강보건학회 2002 大韓口腔保健學會誌 Vol.26 No.3

In order to investigate the factors influencing toothbrush elasticity loss and utilize them as reference data of toothbrush production in the future, 180 toothbrushes out of 18 models (ten brushes for each model) were used for this examination among the toothbrushes for adults which have been distributed in the domestic market. In a rolling method and Bass method ,one-month, two-month, and three-month brushing were examined with Toothbrush Stroke Tester which was designed through the practice of brushing method. From the data, elasticity loss was measured. In the case of a rolling method, orthogonal regression was applied so as to discover the influence upon the elasticity loss of the number of tufts, the total number of tufts, the bristle diameter, the bristle length, and the bristle stiffness according to lateral shape of brushing plane. The results were as follows 1. Brushing in a rolling method, the elasticity loss according to the lateral shape of brushing plane appeared highest with tapered brushing plane, and with convex brushing plane and flat brushing plane in the order, according to type of tufts rows it appeared highest in the second and the fourth tufts rows, and the third and the fifth rows and the third row in the order, and according to bristle stiffness it appeared highest with hard bristles, and with medium bristle and soft bristle in the order (P<0.001). 2. In a rolling method with convex brushing plane, it was found that the more total number of tufts and the thicker bristle diameter, the lower the elasticity loss. It was also found that the more the number of tufts, the longer the bristle length and the stronger the bristle stiffness, the higher the elasticity loss. 3. In a rolling method with flat brushing plane, it was discovered that the more the number of tufts and the total number of tuft, the longer the bristle length and the stronger the bristle stiffness, the higher the rate of elasticity loss(P<0.001). It was also discovered that in one-month brushing, the wider the bristle diameter, the lower the rate of elasticity loss. But it was found that the bristle diameter had no influence upon the elasticity loss in two- and three-month brushing. 4. The more the number of tufts and the total number of tufts and the wider the bristle diameter, the stronger the bristle stiffness of an important factor influencing wear index(P<0,05), however, the bristle length had no influence upon the bristle stiffness.

도시지역과 전원지역 12세 아동의 영구치 우식경험도에 관한 실태조사

양정승,조민정 광주보건대학 1994 論文集 Vol.19 No.-

Dental caries is a kind of major disease of oral cavity and is very prevalent in primary schoolchildren of 12 years old. As a trial step to prevent dental caries, the authors surveyed 303 boys and 243 girls in Kwang-ju city and 284 boys and 286 girls in Hwasun-gun. Analysis on the DMF of above schoolchildren reached following results. 1. DMF rates of 12 years old children are shown as 78.21% for boys and 82.71% for girls in urban area(Kwang Ju city) and as 70.42% for boys and 80.76% for girls in rural area(Hwasun-gun). 2. DMFT indexes are 3.26 for boys and 3.49 for girls in urban area, 2.49 for boys and 3.42 for girls in rural area. 3. DMFT rates are estimated as 12.71%(boys) and 13.25%(girls) in urban area, 10.06%(boys) and 13.18%(girls) in rural area. 4. DMFS indexes are obtained as 5.61(boys) and 6.181(girls) in urban area, 5.44(boys) and 6.307(girls) in rural area. 5. DMFS indexes marked the most severe infection with caries at occlusal surface, the medium at proximal surface and the lowest at buccolingual surface in both boys and girls of urban area. However, in rural area, dental caries showed the most severe condition at occlusal surface, the medium at buccolingual surface and the lowest at proximal surface. 6. It is necessary that oral health care center should be established at each primary school in order to prevent dental caries of 12 years old schoolchildren both in urban and in rural areas and also dentists and dental hygienists should be provided to execute school based oral health care projects such as pit and fissure sealing, tooth-brushing instruction and fluoride-solution rinsing. It is convinced that DMF of schoolchildren can be reduced by the above-mentioned school-based oral health care projects under the proper support of government.

만성 치주염 환자에서 Tooth Pick method의 효과에 관한 연구

양정승 광주보건대학 1998 論文集 Vol.23 No.-

Oral hygiene is the most important aspect of periodontal treatment. Daily plaque removal with a toothbrush is an important component of most oral hygiene programs intended to prevent and treat periodontal diseases. Toothpick method is a periodontal closed procedure. The purpose of the toothpick method is treating periodontitis, as well as repairing and keeping periodontium in good condition. The sample consisted of 20 patients with chronic adult periodontitis from 30yrs to 55yrs. The practice of toothpick method was done twelve times at two weeks intervally. Examination regarding plaque index, periodontal pocket depth, gingival index were performed. Evaluation was taken to six months intervals at the pre and posttreatment. The obtained results were as follows ; 1. The plaque control record was 49.03% at first visit and 25.95% at last visit when finished. In view of the results so far incremented ability of plaque control. 2. Mean periodontal pocket depth was reduced from 2.47 to 2.12 (P<0.001). 3. Gingival index was reduced from 2.17 to 1.23 (P<0.01).

도시지역 노인의 구강건강실태 조사연구

양정승 광주보건대학 1995 論文集 Vol.20 No.-

As the economic and social regulations change very repidly in Korea, private and public efforts to improve the quality of life are required genuinely. Among many groups of age, it is time to pay attention to the welfare of aged people and to make it better, But the welfare system for the aged people is now very unsatisfactory, especially the dental health care system due to its insufficient data both areas in research works and its management. In my dissertation, therefore, I tried to survey the dental health care condition of 137 aged persons over sixty living in Kwangju city to have more effective data and to give more fruitful management for the practical application of the dental health care system. The followings are my conclusions: 1. The index numbers of DMFT, DT, MT, and FT are 12.52, 3.1, 7.59, and 1.83 respectively. And the average number of the present teeth is appeared at 16.14. 2. From the analysis of DMFT rate, I can find DT, MT, and FT rates to be 25.75%, 33.90%, and 16.99% respectively. 3. Tooth mortality rate shows 34.83%, tooth fatality rate 69.90% and with the increase of age, they are on the increase, too. 4. Simplified oral hygiene index shows 1.42, debris index 0.67, and calculus index 0.75 respectively. 5. Among the elements connected with root surface caries, gingival recession and pocket depth are decreasing when they are 0~3 ㎜ in depth, however, they are increasing when they are 4~6 ㎜ or over 6 ㎜ in depth. 6. Root surface caries is appeared at 3.26% in the age group of 60-69, 9.24% in the group of 70-79, and 36.89% in the group of 80-89 respectively. 7. In order to provide the old with comprehensive dental health care which can enhance the level of dental health care should be carried out.

20대 여성의 치아우식활성검사 결과와 치아우식경험도와의 상관성에 관한 연구

양정승,전주연,이현옥 광주보건대학 1994 論文集 Vol.19 No.-

The purpose of this study was as follows: This study was to examine caries activity test and survey caries experience of 120 girl students in college. We examined correlation the results of caries activity test and caries experience. First of all, examined Snyder test, stimulated saliva flow rate test, unstimulated saliva flow rate test, salivary viscosity test, patient oral hygiene performance test. We surveyed cries eperience as caries experienced permanent tooth index and caries experience permanent tooth rate etc, calculated the simple correlation index, examined statistical significant. The results of this study showed that stimulated saliva flow rate test was the highest of caries activity test measurement. In caries activity test statistical significant correlation. It was the correlation index- 0.2136 and p=valuable level 0.010. Snyder Test had correlation, was the correlation index 0.1779, and p-value level 0.026. There was no significant correlation unstimulated saliva flow rate test and patient oral hygiene performance test.

복지태도 및 인식과 상호성(reciprocity) 결정요인

양정승 한국보건사회연구원 2017 한국복지패널 학술대회 논문집 Vol.10 No.-

본 연구는 복지태도 및 인식, 상호성을 결정하는데 경제적 요인이 중요한지 그리고 경제적 요인외에 어떠한 것이 이러한 복지태도 및 상호성을 결정하는데 기여하는 지를 보고자 하였다. 분석결과 개인의 관측되지 않는 특성을 통제하지 않았을 때 소득수준의 증가와 교육수준의 증가는 복지태도 및 인식, 상호성과 주로 부정적으로 결부되는 것으로 나타났다. 그러나 고정효과모형을 통하여 개인의 관측할 수 없는 특성을 통제하였을 때 소득이나 고용여부 등의 경제적 이득 변수들은 복지태도 및 상호성을 결정하는데 중요한 요인으로 볼 수 없었다. 한편 개인의 관측되지 않는 특성의 형성경로를 분석하기 위해 아버지와 어머니의 복지태도 및 상호성을 통제하였을 때 이들의 기여도가 매우 큰 것으로 나타났다. 즉 한 개인의 복지태도 및 인식, 상호성의 형성에 부모의 역할이 매우 중요한 것으로 나타났다. 또한 특정 특성은 부모의 동일한 특성으로부터 직접적으로 학습되거나 모방되는 것으로 나타났다.

EMI 차폐를 위한 구리-스테인레스 강 다층박막의 스퍼터링

양정승,김상호 한국표면공학회 2002 한국표면공학회 학술발표회 초록집 Vol.2002 No.-

초음속 비행물체 표면의 압축성 난류 경계층 계산

양정승,이동호 한국항공우주학회 1982 한국항공우주학회 학술발표회 논문집 Vol.- No.-

20世紀 海軍役割에 관한 歷史的 考察

양정승 해군대학 1993 海洋戰略 Vol.- No.79