新聞에 揭載된 韓國人 自殺記事 內容 分析

박동철,이영식,박두병,곽동일,이길홍 중앙대학교 의과대학 의과학연구소 1991 中央醫大誌 Vol.16 No.4

To analyze the suicide patterns of Koreans, a research study was conducted from the suicide cases taken from the Dong-A Newspaper from 1981 to 1990. Four hundred and eleven cases were obtained from the collected data, which were composed of 275 cases of males and 136 cases of fe-males. The age groups were classified into 6 groups for convenience, 10's, 20's, 30's, 40's, 50's, and 60's. The group differences were then compared for analysis. The characteristics in relation to the socio-demographics and family environment were conpared for analysis. Suicide types compared and analyzed by gender and age group in terms of frequency, type, time, place, method, motivation, location and size of articles, and risk factors for suicide. Sta-tistical analysis used SPSS/PC^+ for cross-tabulation analysis. 1. In relation to the rate of Koreans' suicide, male suicide rate was at least double that of fe-male(2.02 : 1). The age group of the 20's(118 cases) and 30's(96 cases) accounted for a pre-dominant rate of 52.6% of the sample. 2. The distribution of occupation of suicides showed that most were students(22.5%), followed by the unemployed(17.8%) and housewives(12.7%), retrospectively. In relation to the residency of those that had committed suicide, residents who lived in large cities accounted for the greatest number as 70.3%, Especially, females and cases in their 40's were more likely to live in large cities. In the marital status, singles were in the lead(144 cases, 33.0%). With respect to marital status by age group, cases in their 40's(17.4%) tended to have an unstable status such as divorce, separation, co-habitation, remarriage, or widowed, In birth order, the first child were the highest ones as 22.1%. 3. In relationship to the family structure, data revealed that nuclear families were the most(163 cases). Especially, males and cases in their 40's were likely to be form a nuclear familiy, while those in their 60's were from and extended family. In relation to parental survival, data showed that both parents dead were at the highest frequency as 264 cases. In case of female, loss of both parents were more frequent. 4. With respect to the frequency of recurrent suicide, data presented that 6.3% of the cases ex-perienced recurrent suicide. In case of the recurrent suicide of male(8.0%), the rate was about 2.3 times higher than of female(2.9%) 5. For the relationships of homicide and suicide, data showed that 128cases(31.2%) hurt others and attempted suicide. Among them, 96 cases(23.4%) attempted co-suicide and 32 cases(7.8%) attempted homicide others. Analyzed by the characteristics of gender and age group, 10's males were more likely to commit solo-suicide, women in their 30's or 40's commit co-suicide, and 50's commit suicide after homicide. Among the victims of homicide, family members were the most(42 cases). Analysis by age difference between the suicide partners, the cases of 30's or 40's were with family members, 20's with lovers, and 10's with their peers. 6. In relation to the annual distribution of frequency of suicide, data revealed that most cases of suicide were reported in 1990(95 cases), 70 case in 1981, 45 cases in 1982, 44 in 1983, 30 in 1986, 1987, 1989, each, the fewest cases were in 1985(14 cases). In terms of the trend of sui-cide, recently the rate of male and old cohorts over 50's has been increasing. A great number of suicide were in 1981∼1982 and 1989∼1990, the period of a treat political-economical up-heaval. On the other hand, the number of suicide was low during the period of political-economical stability of 1985 and of political thawing in 1988. These fact demonstrated that there were some relationships between political-economical change and the rate of suicide. 7. For the month of suicide, data showed that the highest frequency of cases were in May and June(21.7%), followed by 44(10.7%) in September. For the season of suicide, the fewest cases were in winter(78 cases). The cases of 10's or 20's were more likely to suicide in May and June, and those of older aged group above 50's in fall, weekend, between 1 : 00∼6 : 00 A.M. 8. With respect to the place of suicide, data presented that in most cases suicide was attempted at home(210 cases). Compared by gender, the rate of femal's suicide at home(71.3%) was remarkably higher than that of male's(41.4%). On the other hand, the rate of male's suicide in indoors was much higher(36.4%) than that of female's(15.4%). Analyzed by age groups over 50's were more likely to attempt suicide at home, 30's in indoors, 20's in the office or outdoors. 9. For the methods of suicide, 31.9% resort to intoxication followed hanging(21.9%), jumping(13.1%), burning(10.2%), CO poisoning(6.1%), gunshot(3.9%) or drowning(2.9%), Compared by gender, while females were more likely to take such passive methods as intoxication or CO poisoning, males were more likely to take rather fatal methods such as hanging, burning, gunshot. 10. In relation to the general motives of suicide, data showed that economic poverty was the lead(20.9%), followed by emotional conflict(19.2%), marital conflict(16.1%), demonstration(8.5%), health problem (6.3%), school problems(5.8%), and job problems(5.6%). Analyzed by age group, in case of 10's adolescent conflicts such as school problems, scolding of parents of teachers, mockery, and frustration were the major motivations of their suicide, in the cases of 20's hetero-sexual problems, job and demonstration were their motivators. In case of 30's marital and legal problems were the motivators, economic problems in the age of 40's, loss of objects in 50's and health problems in 60's were their major motivations of suicide. 11. Analyzed by subtypes of suicide in the socio-psychological perspective, data showed that fatalistic suicide was the most frequent(30.2%), followed by anomic suicide(29.4%), egoistic suicide(21.7%), altruistic suicide(11.2%). Whereas in case of males altruistic and egoistic suicide were relatively more frequent, in case of females fatalistic and egoistic suicide were relatively more frequent. Analyzed by age group, fatalistic suicide in the 60's, anomic suicide in the 40's, egoistic suicide in the 10's adolescents and altruistic suicide in the 20's were more frequent. 12. For the psychodynamic factors of suicide, data revealed that most cases were escape from despair and loneliness(28.5%), followed by revenge toward the objects that hurt him or her(14.8%), inferiority(12.7%), escape from a conflict situation(11.4%), altruistic(7.8%), self-punishment for guilt(6.8%), pessimism(3.9%), reunion fantasy(1.0%), and other(13.1%). Whereas the psychodynamic factors of males were altruistic and inferiority, those of females were despair and revenge. Analyzed by age group, incase of old age groups over 50's despair and loneliness were the major fcators, revenge in the 30's and 40's, altruistic in the 20's inferiority and escape from a conflict situation in the 10's were more frequent psychodynamic factors. 13. With respect to the suicide risk rescue factors, data showed that as the helpers at the time of trying suicide, family members were the most(111 cases). Family members as helpers were more frequent in the case of females and in those of 10's or 60's. While passerbys were more frequent in the case of males and in those of 50's. For the suicide notes, 17.3% left the notes behind and those in their 60's males were more likely to have a relatively higher rate of leaving motes behind. 14. In relation to the experience rate of the suicide risk factors, data demonstrated that 16.8% had a history of depression which comprised the highest rate, followed by an alcoholism history(10.0%), unemployment and retirement(7.1%), recent death of intimates and separation(4.6%), health change(3.2%). Analyzed by gender and age groups, males were more likely to have an alcoholism or depression history, those in their 40's were more likely to have an alcoholism history than those of any other age group cohorts.

확장형 칼만필터를 이용한 현수교의 감쇠성능 평가

박동욱(Park Dong-Uk),김남식(Kim Nam-Sik) 대한토목학회 2011 대한토목학회논문집 A Vol.31 No.2A

감쇠비는 현수교에 있어서 교량진동을 평가하기 위한 중요한 동적 요소 중 하나이다. 하지만, 실재 현수교에서 계측된 상시 진동신호로부터 감쇠비를 직접적으로 추정하는 것은 현실적으로 매우 어려운 일이다. 뿐만 아니라, 한정된 계측자료를 이용하여 추정된 감쇠비로부터 공기역학적 감쇠와 마찰 감쇠를 구분하는 것은 더욱 어렵다. Macdonald는 2005년 발표한 자료에서 공기 역학적 감쇠성능은 풍속에 따라 선형적으로 증가한다고 하였으며, Park등은 감쇠성능은 진동의 크기에 따라 변화할 수 있다고 하였다. 따라서 본 논문에서는 이러한 감쇠비, 풍속, 진동의 크기 사이의 관계를 연구하여, 추정 감쇠비로부터 공기역학적 감쇠와 마찰 감쇠를 구분하고자 하였다. 본 논문에서 감쇠비 추정대상으로는 전라남도 고흥에 위치한 소록대교를 선택하였으며, 감쇠비 추정에는 Hilbert 변환법을 이용한 방법과 확장형 칼만필터를 이용하였다. 또한 두 방법으로 추정된 감쇠비들을 상호 비교를 실시하였다. 그 결과, 상시진동 자료와 차량재하실험으로부터 얻어진 자료를 이용하여 추정된 감쇠비와 풍속, 그리고 가속도의 크기를 이용하여 추정 감쇠비로부터 공기역학적 감쇠 성능과 마찰 감쇠 성능의 구분이 가능하다는 것을 알 수 있었다. The damping ratio as an index of bridge vibration could be considered as one of the important dynamic characteristics of a suspension bridge. But estimating of damping ratio on an existing suspension bridge under ambient vibration condition could be a laborious task. Moreover, it is not simple to directly distinguish aerodynamic damping and friction damping from apparent damping. According to previous studies, the aerodynamic damping properties can be linearly affected by wind speed level, and apparent damping ratio can be affected by amplitude of vibration. Therefore, in this article, the relationships among damping ratio, wind speed level and amplitude of acceleration were studied for separating extract aerodynamic damping and friction damping from apparent damping. Damping ratios on Sorok Bridge, a suspension bridge which is a located in Go-Heung, Korea, were estimated by two different methods as using Hilbert transform and extended Kalman filter which were well known as effective estimation methods for non-linear state. It was possible to distinguish aerodynamic damping and friction damping from apparent damping using averaged normal components of wind speed, RMQ values of acceleration, and estimated damping ratios from wind-induced vibration responses and vehicle loading responses.

Event Mean Concentrations (EMCs) and First Flush Characteristics of Runoff from a Public Park in Korea

Jung, Jae-Woon,Park, Ha-Na,Yoon, Kwang-Sik,Choi, Dong-Ho,Lim, Byung-Jin The Korean Society for Applied Biological Chemistr 2013 Applied Biological Chemistry (Appl Biol Chem) Vol.56 No.6

Characteristics of non-point source (NPS) pollution runoff from a public park in Gwangju, Korea were investigated. Results exhibited the highest pollutant concentrations at the start of the rainfall events due to their build-up and wash off processes. The average event mean concentrations (EMCs) were 27.8, 7.2, 56.3, 7.5, and 0.84 mg/L (range: 4.2-54.8 mg/L) for COD, (0.5-20.8 mg/L) for TOC, (22.3-138.4) for SS, (1.4-18.5 mg/L) for T-N, and (0.17-2.02 mg/L) for T-P, respectively. The study site presented a strong first flush effect for most rainfall events. However, no first flush effect was observed in rainfall events with small rainfall factors (e.g. intensity, amount, and runoff depth). On the other hand, the ratios of total pollution loads discharged by the first 20% of runoff volume were 32% for COD, 34% for TOC, 36% for SS, 42% for T-N, and 50% for T-P. Especially, $MFF_{20}$ (mass first flush) values of T-N and T-P were larger than those of other pollutants (COD, TOC, SS), indicating that T-N and T-P are easily transported by stormwater runoff from the public park. First flush management of T-N and T-P, therefore, is required for efficient water quality management of the public park.

골수 검사상 양성 혈구 탐식 조직구가 나타난 소아의 임상적 고찰

박진아,박주영,박지민,박샛별,김흥식,전동석,Park, Jin A,Park, Joo Young,Park, Ji Min,Park, Seat Byoul,Kim, Heung Sik,Jeon, Dong Seok 대한소아청소년과학회 2002 Clinical and Experimental Pediatrics (CEP) Vol.45 No.8

목 적: 혈구 탐식 조직구 증식증은 양성 질환으로는 드물게 치명율이 높은 질환으로, 발열, 간비장 종대, 림프절 종대 등의 증상이 있고, 검사 소견에서 양성의 혈구 탐식 조직구가 나타난 경우 진단되나 치료가 혼란스러운 경우가 많다. 골수 검사상 양성의 혈구 탐식조직구가 나타난 예들의 임상적 특징을 분석하여 진단 및 치료 방향과 예후 판정에 도움이 되고자 이 연구를 시행하였다. 방 법 : 1995년 1월부터 2001년 11월까지 계명대학교 동산병원에서 골수 검사상 양성의 혈구 탐식 조직구가 나타난 환아 30례를 대상으로, 특징적 임상 증상, 진찰 소견, 혈액 검사 소견, 골수 검사 소견, 치료 방법과 예후에 대하여 임상 기록지를 후향적으로 분석하였다. 또한 골수 도말에서 혈구 탐식 조직구의 수에 따라 a few, some, many로 나누어 환아의 예후와 비교하였다. 결 과 : 골수 검사상 양성 혈구 탐식 조직구를 보인 예들을 분석한 결과 이들의 연령 분포는 2개월에서 15세로, 평균 연령은 5.6세였고, 남녀비는 2.3 : 1로 남아가 많았다. 입원 당시 증상으로는 발열이 가장 많았으며, 호흡기 증상, 위장관 증상 등의 순이었고, 평균 발열 기간은 19.5일이었으며, 진찰 소견은 간비종대, 피부 발진, 림프절 비대 순으로 많았다. 혈액 검사 소견상 백혈구 감소증이 23례(76.7%)로 가장 많았고, 혈소판 감소증이 16례(53.3%), 빈혈이 15례(50.0%), 간기능 검사 이상이 15례(50.0%)로 나타났다. 기저 질환으로 급성 림프구성 백혈병, 악성 림프종 등 면역 저하된 상태가 5례였고, 건강했던 경우가 25례 였으며, 관련 질환의 종류로는 패혈증, 폐렴, 전염성 단핵구증 등의 순이었고, 원인으로는 세균이 많았으며, 바이러스로는 EBV가 4례였고, candida가 1례였다. 골수 도말 소견상 세포 충실도가 정상이 25례(83.3%)였고, 5례(16.7%)에서 감소되어 있었으며, 혈구 탐식 조직구의 수에 따라 분류하였을 때, some이 15례(50.0%), many가 9례(30.0%), a few가 6례(20.0%)이었다. 치료는 보존 요법, 항생제와 항바이러스제, 항진균제, 면역 글로불린, steroid, etoposide, cyclosporine 등의 병용 요법을 시행하였다. 사망율은 30명 중 8명으로 26.7%였으며, 연령이 낮은 군과 혈구 탐식 조직구 수가 some 이상인 경우에 사망률이 높았다. 결 론 : 고열, 간비종대, 범혈구 감소증과 간기능 이상 등의 소견을 보이는 환아에서 조기에 골수 검사를 시행하여 혈구 탐식 조직구가 보일 때, 원인 치료 및 대증 요법과 함께 면역 화학 요법을 시행하는 것이 예후에 도움이 될 것으로 생각되며, 골수 소견과 예후와의 관계는 지속적인 연구 관찰이 필요할 것으로 사료된다. Purpose : The aim of this study is to find a method to diagnose and treat children who showed benign hemophagocytic histiocytes in bone marrow examination. Methods : We analyzed the clinical data of thirty patients retrospectively who showed benign hemophagocytic histiocytes in bone marrow examination from January 1995 to November 2001 at Keimyung University Dong-san Hospital. Bone marrow histiocytes were classified into a few, some, and many according to the number of histiocytes comparing with the white cells. Results : The age of thirty patients ranged from two months to 15 years. The median age was 5.6 years with male predominance(2.3 : 1). The most frequent clinical manifestation was fever; others were respiratory symptom, hepatosplenomegaly, lymphadenopathy and skin rash(in order of frequency). Common laboratory findings were leukopenia, thrombocytopenia, anemia and abnormal liver function test. Infection was present in 30 patients; causative organisms were documented in 15 patients, and bacterial infection was more common. Epstein Barr virus was the cause of infection in four patients. Bone marrow examination showed a few(20.0%), some(75.0%) and many(30.0%) hemophagocytic histiocytes. Combination immunochemotherapy including immunoglobulin, steroids and cyclosporine were helpful in 22 out of 30 patients. The mortality rate was high in young patients who showed some to many hemophagocytic histiocytes. Conclusion : Bone marrow examinations and early detection of histiocytes will be helpful in children who have fever, hepatosplenomegaly and abnormal liver function test. Immunochemotherapy were helpful and further investigation will be needed for the detection of the relationship between the bone marrow findings and prognosis.

국립공원 관리를 위한 해양생태계 장기 모니터링 프로그램의 발전 방향

이채린(Chae-Lin Lee),유재원(Jae-Won Yoo),정병관(Byungkwan Jeoung),김창수(Chang-Soo Kim),안동식(Dong-Sik Ahn),김성태(Sungtae Kim),성은주(Eun-Ju Sung),김성현(Sung-Hyun Kim),정수영(Su-Yeoung Jeong),박영석(Young-Seuk Park) 국립공원연구원 2021 국립공원연구지 Vol.12 No.2

생태계 변화의 모니터링은 효율적 생태계 관리를 위한 기초 정보 수집을 위해 중요한 과정이다. 많은 생태 현상과 그 과정은 오랜 시간에 걸쳐 진행되므로 국립공원의 지속적인 보전 및 효율적 관리를 위해 생태계 모니터링은 장기적으로 이루어질 필요가 있다. 본 연구는 국내외 장기 모니터링 프로그램 사례 분석을 통해 성공적인 장기 모니터링을 위한 방법으로써, 최적화된 모니터링 설계, 표준화된 운용방안 마련, 인적 자원 및 DATA 관리 체계 수립, 안정적인 재정 마련 및 후속지원 등을 제시하였다. 이를 바탕으로, 현재 10년 넘게 수행되고 있는 ‘HS호 유류유출 사고 해역 장기 모니터링 프로그램’의 발전 방향으로 적응형 모니터링 방식이 적용된 표준화된 프로토콜의 정립, QA/QC와 지속적인 자료 관리, 조사 항목의 연계성 강화 등의 구체적 방안을 제안한다. Monitoring ecosystem changes is an important process for collecting basic information for ecosystem management. Since many ecological phenomena and their processes take place over a long period of time, it is necessary to conduct long-term monitoring of ecosystems for the continuous conservation and efficient management of national parks. This study suggested an optimized monitoring design, standardized operation plan, human resource and data management system, stable financial preparation and follow-up support as methods for successful long-term monitoring through case analysis of domestic and foreign long-term monitoring programs. Based on this, it proposes specific measures such as establishing a standardized protocol with adaptive monitoring methods, continuous data management with QA/QC, and strengthening the linkage of investigation items in the development direction of the “HS oil spill accident long-term monitoring program” that has been conducted for more than a decade.

우리나라에서 솔껍질깍지벌레의 분포확산

임유진,이상명,김동수,김준범,최광식,이신혜,박정규,이동운,Lim, Eu-Gene,Lee, Sang-Myeong,Kim, Dong-Soo,Kim, Joon-Bum,Lee, Shin-Hye,Choi, Kwang-Sik,Park, Chung-Gyoo,Lee, Dong-Woon 한국응용곤충학회 2012 한국응용곤충학회지 Vol.51 No.1

솔껍질깍지벌레는 우리나라 곰솔림의 주요한 해충의 하나이다. 본 연구는 우리나라에서 솔껍질깍지벌레의 분포를 알아보기 위하여 7개도 3개 광역시, 91개 시군구, 686 읍면동의 해송림에서 2010년 밀도를 조사하였다. 5개도 2개 광역시에서 솔껍질깍지벌레가 서식하고 있었는데 시군구별로는 조사대상의 64.8%인 59개 시군구에서 서식이 확인되었다. 솔껍질깍지벌레의 분포는 남해안 전역과 동해안의 포항, 서해안의 충남 보령지역까지 분포하였다. 충북과 대전광역시 및 제주도에서는 솔껍질깍지벌레의 분포가 확인되지 않았다. 부산지역은 16곳의 모든 구에서 솔껍질깍지벌레가 분포하였고, 시군 단위에서는 전남 해남군의 솔껍질깍지벌레 평균밀도가 1.713마리/0.785 $cm^2$로 가장 높았으며 읍면동 단위에서는 해남군 송지면이 6.36마리/0.785 $cm^2$로 가장 높았다. 곰솔 가지 내의 솔껍질깍지벌레 밀도와 솔껍질깍지벌레가 서식하고 있는 빈도와는 높은 상관관계가 있었다(상관계수=0.89). The black pine bast scale, $Masucoccus$ $thunbergianae$ (Hemiptera: Margarodidae), is a serious pest of the Japanese black pine, $Pinus$ $thunbergii$, in Korea. The distribution of the black pine bast scale was examined, looking overall at 686 towns (eup), townships (myeon) or neighborhoods (dong). There were Japanese black pine ($Pinus$ $thunbergii$) forests in 91 cities, counties (gun) and borough (gu), in seven provinces and three metropolitan cities during 2010. Black pine bast scale were found in 64.8% of cities or counties or borough (59) in 7 provinces and 3 metropolitan cities, and were distributed in all South Costal regions, Pohang in East Costal region and Boryeong in West Costal region. Chungcheongbukdo, Daejeon and Jeju did not have black pine bast scale. All the gu regions in Busan had black pine bast scale, of which the area with the highest prevalence was Haenam in Jeollanamdo (1.713 crawlers/0.785 $cm^2$). Songji-myeon had the highest occurrence rate (6.36 crawlers/0.785 $cm^2$) from the towns, township and dong. The density of black pine bast scale in twigs was highly correlated with percentage of the sample with scale (Correlation coefficacy=0.89).

음향방출과 미세역학적시험법을 이용한 단일섬유강화 에폭시 복합재료의 비파괴적 섬유파단 위치표정 및 계면물성 평가

박종민,공진우,김대식,윤동진 한국비파괴검사학회 2003 한국비파괴검사학회지 Vol.23 No.5

섬유파단은 복합재료의 기계적물성을 규명하는 가장 중요한 현상 중 하나이며, 섬유파단 위치는 기지재료의 물성과 섬유표면 처리에 따라 광학현미경에 의한 방법 뿐만 아니라 음향방출법을 이용하여 확인 및 상호비교 할 수 있다. 두 개의 음향방출 센서를 단일섬유강학 에폭시 복합재료 시편 표면에 부착 시켜 연속적인 섬유파단 신호를 변형률과 측정 시간에 따라 감지하였으며, 계면전단강도는 단일섬유강화 복합재료 시험에서 광학적 방법과 음향방출법을 이용하여 측정하였다. 탄소섬유의 파단 수는 섬유표면을 전기증착으로 처리한 경우가 많았으며, 광학적인 관찰 시에 좀 더 많게 나타났다. 하지만 음향방출법과 광학적 방법에 의한 섬유파단의 위치는 작은 오차범위 내에서 상호 잘 일치하는 결과를 얻을 수 있었다. 음향방출법에 의한 섬유파단 위치표정과 파형분석은 투명, 반투명 및 불투명한 복합재료의 계면물성을 비파괴적으로 측정하기 위한 유용한 방법으로 사료된다. Fiber fracture is one of the dominant failure phenomena affecting the total mechanical performance of the composites. fiber fracture locations were measured through the conventional optical microscope and the nondestructive acoustic emission (AE) technique and then were compared together as a function of the epoxy matrix modulus and the fiber surface treatment by the electrodeposition method (ED). Interfacial shear strength (IFSS) was measured using tensile fragmentation test in combination of AE method. ED treatment of the fiber surface enlarged the number of fiber fracture locations in comparison to the untreated case. The number of fiber fracture events measured by the AE method was less than optically obtained one. However, fiber fracture locations determined by AE detection corresponded with those by optical observation with small errors. The source location of fiber breaks by AE analysis could be a nondestructive, valuable method to measure interfacial shear strength (IFSS) of matrix in non-, semi- and/or transparent polymer composites

Low doses of ionizing radiation suppress doxorubicin-induced senescence-like phenotypes by activation of ERK1/2 and suppression of p38 kinase in MCF7 human breast cancer cells

신재식,우상혁,이형찬,홍승우,유두현,홍석일,이왕재,이명석,진영우,안성관,진동훈,박인철 Sookmyung Women's University Research Institute of 2010 여성과 건강 Vol.6 No.1

Dong-Chun Lecture : Cell-based High Content Screening (HCS) for action modes of drug targets by using systematic deletion mutants of Schizosaccharomyces pombe

( Dong Uk Kim ),( Im Seon Woo ),( Mi Sun Won ),( Young Joo Jang ),( Kyung Sook Chung ),( Han Oh Park ),( Hyang Sook Yoo ),( Kwang Lae Hoe ),( Doo Sik Kim ) 한국생화학분자생물학회 (구 한국생화학회) 2005 생화학분자생물학회 춘계학술발표논문집 Vol.2005 No.-

Simulated resin root canal에서 엔진 구동형 Ni-Ti 파일로 근관성형 후 Buchanan plugger의 근관 내 삽입깊이에 대한 비교 연구

박연식,김동준,황윤찬,황인남,오원만 大韓齒科保存學會 2006 Restorative Dentistry & Endodontics Vol.31 No.2

본 연구는 레진 블록에서 엔진구동형 Ni-Ti 기구를 이용하여 근관성형 후 Buchanan plugger의 삽입 깊이에 대한 비교를 통해 임상적 상황에서 Ni-Ti 파일로 근관 성형 후 Continuous wave of condensation technique을 이용한 근관 충전시 적절한 크기의 Buchanan plugger 선택에 지침을 제공하기 위해 시행되었다. 만곡근관과 직선근관을 가진 레진 블록에서 ProTaper와 ProFile을 이용하여 근관 성형을 하였다. 성형 후 근관에 Buchanan plugger 가 근관벽과 처음으로 접촉하는 부위까지 삽입한 후 그 상태에서 스태너를 이용하여 이미지를 얻었다. 이미지 분석 프로그램을 이용해 근첨에서 plugger 첨부까지의 거리를 얻었다. 각 기구에 대한 plugger 삽입깊이에 대한 유의성을 검정하기 위해 one-way ANOVA를 시행하였고, 사후검정을 위해 Scheffe's test를 시행하였다. 본 연구의 결과 만곡되고 좁읍 근관에서, ProTaper F2와 F3로 마무리 성형한 근관에서 F. FM 크기의 plugger를 사용할 경우 Continuous wave of condensation technique으로 적절한 근관충전이 가능함을 시사하였다. This study was conducted to evaluate the insertion depth of Buchanan plugger after shaping by various Ni-Ti rotary files. It was conducted to determine which size of plugger are appropriate, when root canals are shaped with Ni-Ti rotary files and obturated by Continuous wave of condensation technique. Two type of eighty simulated resin blocks were used : J-shaped and straight shaped canal. The simulated canals were instrumented by ProTaper and ProFile. Buchanan pluggers were inserted into the canal, and then the image was recorded to scanner. The distance from the apex of the canal to the plugger tip was measured by image analysis program. Data were analyzed by one-way ANOVA followed by Scheffe's test. The results were as follows 1. In straight canal finished up to ProTaper F2 and F3 file, F and FM pluggers were inserted more than 5 ㎜ short of working length. 2. In J-shaped canal finished up to ProTaper F2 file, F pluggers were inserted more than 5 ㎜ short of working length. Finished up to ProTaper F3 file, F and FM pluggers were inserted more than 5 ㎜ short of working length. 3. In straight and J-shaped canal finished up to ProFile . 06/#20 and ,06/#25, any of Buchanan plugger could not be inserted more than 5 ㎜ short of working lenghth. These results suggest that canals shaped by ProTaper could be obturated by Continuous wave of condensation technique with F and FM size Buchanan plugger.