주물의 후처리

김동응,Kim, Dong-Eung 한국주조공학회 2022 한국주조공학회지 Vol.42 No.5

치과종사자들의 두발 중 수은함량과 수은증기 발생을 억제하는 제재들의 평가

김동응(Dong Eung Kim),송근배(Kun Bae Song),김영진(Young Jin Kim) 대한치과의사협회 1989 대한치과의사협회지 Vol.27 No.7

스틸-알루미늄의 주조접합 특성에 미치는 표면처리의 영향

김태형(Tae-Hyeong Kim),김효중(Hyo-Jung Kim),임경묵(Kyoung-Mook Lim),김동응(Dong-Eung Kim),양대호(Dae-Ho Yang),신제식(Je-Sik Shin) 한국생산제조학회 2017 한국생산제조시스템학회 학술발표대회 논문집 Vol.2017 No.12

불소의 국소도포에 의한 백서 치아 무기이온 용출 억제효과

김동응,송근배,윤희숙 慶北大學校 齒科大學 1990 慶北齒大論文集 Vol.7 No.2

In order to determine the inhibitory effects by topical fluorides on dissolution of inorganic ions, 2% NaF, 10% SnF_2 and 1.23% APF gel were topically applied to the incisors of rat for two to four times. The collected incisors were decalcified with 5ml of acetic acid buffer solutions(pH 4.5)for 30min. and dissolved inorganic ions(Ca & P) were measured with atomic absorption spectrophotometer and U-V spectrophotometer. The results obtained were as follows; Two times and four times application groups of APF, SnF_2 and NaF were superior to control group(F=9.0325, p<0.01) in inhibitory effect of dissolving calcium ions, but four times application groups had no statistically significant difference(F=1.8700, p>0.05). The inhibitory effect of dissolving phosphrus appeared more effective in APF, SnF_2 and NaF groups than control group, but had no statistically significant difference both two and four times topical fluoride application group(p>0.05). In comparing of calcium dissolution, fluoride application groups were more effective than nonfluoride group. It was significantly different in two times application groups (p<0.01), but had no significantly difference in four times application groups (p>0.05). The same result was obtained in the inhibitory effect of the phosphrus dissolution.

充塡된 아말감에서 遊離되는 水銀의 體內蓄積에 對한 評價

김동응,송근배,성재현 慶北大學校 齒科大學 1991 慶北齒大論文集 Vol.8 No.2

The purpose of the present study was to determine the effect to the human body by mercury released from amalgam restoration. for this, comprehensive study about mercury contents in the body was experimented in the saliva, urine, plasma, erythrocytes, and hair of 37 subjects with amalgam restoration and 28 subjects without amalgam restoration. The results were as follows; 1. The salivary(25.4±23.0㎍/ℓ) and urinary(16.7±16.0㎍/g·creatinine/ℓ) mercury contents(66.9±22.0㎍/ℓ) of the subjects with amalgam restoration were significant higher than those of the controls (saliva: 10.5±7.0㎍/ℓ, urine: 10.2±10.0㎍/g·creatinine/ℓ) (saliva: p<0.01, urine: p<0.05). But the plasma(67.2±30.0㎍/ℓ), erythrocytes(72.7±15.0㎍/ℓ) and hair mercury contents(3.29±1.03㎎/ℓ) of the subjects with amalgam restoration were slightly higher than those of the controls (plasma: 62.9±37.0㎍/ℓ, erythrocytes: 67.1±16.0㎍/ℓ, hair: 3.04±1.11㎎/ℓ) but there were no significant difference(P>0.05). 2. In control group, the hair mercury content was highest and erythrocytes, plasma, saliva, urine in descending order(F=21, 653, p<0.001). In comparison with each sample, there were no significant difference between salivary mercury content and urinary mercury content, plasma mercury content and erythrocytes mercury content (p>0.05) but there were significant difference among the other samples(p<0.05). In subjects with amalgam restoration group, the hair mercury content was highest in subjects with amalgam restorations and erythrocytes, plasma, saliva, urine in descending order(F=28.848, p<0.001). In comparison with each sample, there were no significant difference between plasma mercury content and erythrocytes mercury content(p>0.05) but there were significant difference among the other samples(p<0.05). 3. There was significant correlationship between the hair mercury content and the salivary mercury content in the subjects with amalgam restration(r=0.436, p<0.01) but there was no correlationship among the other samples. 4. There was significant correlation between amount of amalgam and salivary mercury content(r=0.3404, p<0.05), between erythrocytes mercury content(r=0.3269, p<0.05) and hair mercury content but there was no correlation between urinary mercury content(r=0.0934, p>0.05), and between the amount of amalgam and plasma mercury content(r=0.1163, p>0.05). 5. There was no difference between the results adjusted by a gram of creatinine excretion per liter of urine and unadjusted results. 6. The hair mercury content in smoking group is significantly higher than that of non-smoking group in subjects with amalgam restoration but there was no evidence in the relation of smoking and the content of mercury in human body in other samples and eating fish, chewing gums, drinking alcohol an bruxism are not related with the contents of mercury in human body.

경상북도 전원지역 주민의 치과보철치료실태 및 수요도조사

신영림,김동응 慶北大學校 齒科大學 1993 慶北齒大論文集 Vol.10 No.2

저자는 농어촌지역주민들의 치아보철치료현황과 보철물수요정도를 조사하여 구강건강계획수립에 필요한 기초자료를 마련하기 위하여 경상북도 8개군을 임의 선정하고 각군에서 1개면 및 1개 자연부락을 무작위로 추출하여 1141명을 구강검진과 설문조사하여 다음과 같은 결론을 얻었다. 1. 상악보철물보유현황은 단순금관이 조사대상자 1인당 0.38개, 계속가공의치보유율은 28%, 국소의치보유율은 7.10%, 총의치보유율은 9.38%, 무치악율은 4.47%이었다. 2. 하악보철물보유현황은 단순금관이 조사대상자 1인당 0.39개, 계속가공의치보유율은 26%, 국소의치보유율은 8.76%, 총의치보유율은 5.61%, 무치악자율은 3.42%이었다. 3. 학력과 구강내보철현황과의 관계에 있어서 단순금관보유율은 학력이 높아질수록 낮아지는 경향이 있었고, 계속가공의치보유현황은 국졸군에 있어서 가장 높게 나타났고 국소의치보유율, 총의치보유율 및 무치악율에 있어서는 학력이 높아질수록 감소하는 경향을 나타내어 전체적으로 학력이 높을수록 보철장착율이 낮아지는 경향이었다. 4. 보철치료필요정도는 단순금관경우 1인당 1.05개, 계속가공의치의 경우 1인당 0.85개, 국소의치의 경우 58.6%가 새로 제작하거나 필요로 하는 것으로 조사 되었고 총의치의 경우 24.8%가 필요한 것으로 나타났다. 5. 보철치료필요정도는 단순금관의 경우 상악에서 50-59세가 하악에서는 40-49세가 가장 높았고 30-39세가 상,하악 공히 가장 낮았다. 계속 가공의치의 경우 상, 하악 모두 50-59세가 가장 높았고 상악에서는 30세 미안이 가장 낮았으며 하악에서는 30-39세가 가장 낮게 나타났다. 국소의치의 경우 상,하악 모두 60-69세에서 가장 높은 수요도를 나타내었고 30세미만이 가장 낮은 수요도를 나타내었다. 총의치에 있어서는 상하악 모두 연령이 증가함에 따라 수요정도가 높아지는 것으로 조사되었다. In order to collect the basic data for the dental prosthetic treatment status and the needs of prosthetic treatment in the fishing and farming villages. We selected 8 myeons in Kyung-Pook province and take a random sample of 1141 observations. The author had a detail oral examination and questionnaire. The results of these were summarized as follows; 1. In the maxillary prosthetic treatment status, simple crown was 0.38 unit per person, crown & bridge wearing rate was 28%, partial denture wearing rate was 7.10%, complete denture wearing rate was 9.38% and edentulous rate was 4.47%. 2. In the mandibular prosthetic treatment status, simple crown was 0.39 unit per person, crown & bridge wearing rate was 26%, partial denture wearing rate was 8.76%, complete denture wearing rate was 5.61% and edentulous rate was 3.42% 3. In the interrelationship between a school career and dental prosthetic treatment status, generally, it had tendency that the higher a school career, the lower the dental prosthetic treatment status was. 4. In the needs of prosthetic treatment, there was found that the needed simple crown was 1.05unit per person, crown & bridge was 0.85unit per person, new or needed partial denture was 58.6%, and needed complete denture was 24.8%.

구강내 충전아말감으로부터 유리되는 수은의 체내축적양상에 관한 연구

송근배,김동응 대한구강보건학회 1998 大韓口腔保健學會誌 Vol.22 No.1

The purpose of the present study was to evaluate mercury levels in human tissues released after amalgam restoration. The saliva, urine, plasma, erythrocytes, and hair samples were collected from 37 subjects with amalgam restorations and 28 subjects without dental amalgam in their oral cavities. The total area of amalgam restorations were measured on the duplicated stone models. All the body samples were melted with acid digestion method and mercury contents in those tissues were measured with atomic vapour accessory and atomic absorption spectrophotometer. Creatinine in the urine was determined using the creatinine kit and U-V spectrophotometer. The salivary and urinary mercury contents of the subjects with amalgam restoration were significant higher than those of the controls. The hair mercury content was highest in controls and erythrocytes, plasma, saliva, urine in descending order (F=21.653, p<0.001). The hair mercury content was highest in subjects with amalgam restorations and erythrocytes, plasma, saliva, urine in descending order (F=28.848, p<0.001). There was a significant correlationship between the hair mercury content and the salivary mercury content in the subjects with amalgam restoration (r=0.4036, p<0.01) but there was no correlationship except this. There was significant correlation between amount of amalgam and salivary mercury content(r=0.3404, p<0.05) erythrocytes mercury content (r=0.3269, p<0.05) and hair mercury content. There was no difference in results between adjusted by a gram of creatinine excretion per liter of urine and unadjusted one. We found the mercury levels in saliva and urine were higher in subjects with amalgam restoration than subjects without dental amalgam and total released mercury depends on the total surface area of restorated amalgam filling in the mouth. Hair mercury content was the highest among five kinds of body samples. We guess that highly toxic level of mercury can not be released from restorated amalgam body, but all dental personnel that has amalgam restoration in their mouth should be taught about a accelerated effect of the potential hazard of dental amalgam in their mouth and mercury exposure in the dental environment. The author also suggest that a nation-wide guidelines for hygienic use of mercury in dentistry should be developed and disseminated to all dental personnel in Korea.