Collagenase와 esterase가 상아질 접착강도와 nanoleakage에 미치는 영향

정영정,한세현,김종철,이상훈,김정욱,김영재,장기택 大韓小兒齒科學會 2008 大韓小兒齒科學會誌 Vol.35 No.3

본 연구는 상아질 접착계면에서 collagenase와 esterase가 접착강도와 극미세누출에 미치는 영향을 살펴보기 위해 시행하였다. 발치된 치아의 교합면 상아질에 Single Bond 2(SB)와 Clearfil SE bond(SE)를 사용하여 상아질-레진 접착시편을 제작하고,시편을 인산완충용액(PBS)에 24시간(I),또는 PBS(II),collagenase 용액(III),esterase 용액(IV)에 4주간 보관 한 후 질산은 용액으로 염색하였다. 시편의 미세인장접착강도(μTBS)와 질산은 침투 면적을 측정하여 다음과 같은 결과를 얻었다. 1. SB군의 접착강도가 II∼IV군에서 SE군에 비해 낮은 값을 나타내었다(p<O.05). SB군은 II∼IV군의 접착강도가 I군에 비해 낮은 값을 보였으나(p<O.05),SE군의 접착강도는 I∼IV군간에 차이를 보이지 않았다(p>O.05). 2. SB군의 질산은 침투 면적이 SE군에 비해 높았으며(p<O.05),SB군과 SE군에서 질산은 침투 면적은 I ∼ IV군간에 차이를 보이지 않았다(p>O.05). 3. 접착강도와 질산은 침투 면적은 SE군의 I, II,III군에서 음의 상관관계를 보였다(p<O.05). The purpose of this study was to evaluate the effects of collagenase and esterase on dentin bond strength and nanoleakage. Resin composites were bonded to occlusal dentin of premolars with Single Bond 2(SB) and Clearfil SE Bond(SE). After the microtensile specimens were prepared and stored in PBS for 24 hours(I) or, PBS(II), collagenase(III), esterase(IV) solution for 4 weeks, the specimens were stained with silver nitrate solution. Microtensile bond strength(μTBS) and silver penetration area were measured and, the results were as follows: 1. For group II, III, and IV, the bond strengths of SB were lower than those of SB(p<0.05). The bond strengths of SB II, III, and IV were lower than that of SB I(p<0.05). There was no difference among the bond strengths of SE I ∼ IV groups(p>0.05). 2. Silver penetration areas of SB were higher than those of SE for all storage groups(p<0.05). In SB and SE groups, there was no significant difference of silver penetration area among I ∼ IV groups(p>0.05). 3. SE I, II, and III showed inverse relationship between the bond strengths and the silver penetration areas(p<0.05).

상아질 접착에서 collagenase와 esterase가 미세인장결합강도에 미치는 영향

정영정,현홍근,김영재,김정욱,이상훈,김종철,한세현,장기택 대한소아치과학회 2007 大韓小兒齒科學會誌 Vol.34 No.2

상아질-레진 접착강도에 대한 collagenase와 esterase의 영향을 살펴보기 위해, 소구치의 교합면 상아질에 Single Bond 2와 Clearfil SE Bond로 접착을 시행하고 미세 시편을 제작하여 PBS, collagenase 용액, esterase 용액에 4주간 보관한 후 미세인장결합강도를 측정, 비교하여 다음과 같은 결론을 얻었다. 1. 모든 보관 용액에서 Single Bond 2의 미세인장결합강도는 Clearfil SE Bond보다 유의하게 낮았다(p<0.05). 2. Single Bond 2의 미세인장결합강도는 collagenase군이 PBS군, esterase군보다 낮았다(p>0.05). 3. Clearfil SE Bond의 미세인장결합강도는 esterase군이 PBS군에 비해 낮았으나(p>0.05), collagenase군보다는 높았다(p>0.05). Collagenase군은 PBS군에 비해 유의하게 낮은 미세인장결합강도를 보였다(p<0.05). The purpose of this study was to evaluate the effect of collagenase and esterase on the microtensile bond strength (μTBS) in dentin bonding. After resin composites were bonded to occlusal dentin, μTBS specimens were formed and stored in PBS, collagenase, or esterase solution. After 4-week storage, μTBS was determined and, the results were as follows: 1. μTBS values of Single Bond 2 were lower than those of Clearfil SE Bond for all storage medium (p<0.05). 2. In single Bond 2 group, collagenase solution lowered bond strength more than PBS and esterase solution (p>0.05). 3. In Clearfil SE Bond group, esterase solution lowered bond strength more than PBS(p>0.05). Collagenase solution lowered bond strength more than esterase solution(p>0.05) and PBS(p<0.05).

保存血의 腐敗産物에 依한 에틸알콜 生成濃度에 關한 硏究(Ⅱ)

張成吉,金英雲,柳在薰,權五星,朴世延 內務部 國立科學搜査硏究所 2002 國立 科學 搜査 硏究所 年報 Vol.34 No.-

Air abrasive technique 을 이용한 복합레진 수복 증례

장기택,이상훈,한세현,이창우 大韓小兒齒科學會 1997 大韓小兒齒科學會誌 Vol.24 No.4

The air abrasive technique is a non-mechanical method by which teeth are treated before restoration and stains and calculi are removed from tooth surfaces using the kinetic energy of small particles. The air abrasive technique in dentistry was first introduced in the 1950's with as instrument called 'Airdent'. But, as the main restorative materials of the period were amalgam and gold, and the instrument's inability to control the flow of particles caused the particles to be spread throughout the clinics, widespread use was not possible. In the 1990's, as these techincal problems were solved and more interest in new restorative materials rose in an effort to preserve sound tooth structure, new developments took place in instruments related to the air abrasive technique. The air abrasive technique produces less pressure, vibration and heat that might cause patient discomfort and facilitates the preservation of sound tooth structure. It also reduces the need for anesthesia and is less harmful to the pulp. Other advantages include increase in dentin bonding strength of composite resin, lower possibility of saliva contamination and maintenance of a dry field. But there is not direct contact between the nozzle and the tooth, the operator cannot use his or her tactile sense and must rely solely upon visual input. Other disadvantages are : the tooth preparation depends on the operator's ability ; alpha-alumina particles, after bouncing off the tooth surface, cause damage to dental mirrors ; the equipment is expensive and takes up a certain amount of space in the clinic. The author conducted case report using the air abrasive technique on patient visiting the Department of Pediatric Dentistry at Seoul National University Dental Hospital and arrived at the following conclusions. 1. The tooth preparation capability of different air abrasive devices varied widely among manufacturers. 2. It was more effective in treating early caries lesions and stains compared to lesions where caries had already progressed to produce soft dentin. 3. The cold stream and noise caused by the evacuation system was a major cause of discomfort to pediatric patients. 4. As there is no direct contact with tooth surface when using the air abrasive technique for tooth preparation, considerable experience and skill is required for proper tooth preparation.

시온의 운명과 토라 : 공시적 관점에서 본 사 36-39장의 역할에 대한 재고찰 Reconsidering the function of Isaiah 36-39 from a synchronic perspective

장세훈 한국개혁신학회 2003 한국개혁신학 Vol.14 No.-

The last two decades of biblical interpretation has witnessed a dramatic shift in Isaiah studies from interpreting Isaiah as if it were three independent books to interpreting it as a single literary entity. Several scholars have sought to interpret Isaiah as a whole, while uncompromisingly recanting the fundamental premises of the standard historical critical approach. Special attention has been drawn to the literary structural, ideological, canonical and thematic facets set forth in the book of Isaiah, which function as key central clues for understanding the book of Isaiah as a whole. Further emphasis has been placed upon these signs to gain an insight into the way in which the book of Isaiah is read as a unitary entity. It is commonly agreed, in particular, that Isaiah 36-39 plays a crucial role in shedding light on how to see the entire book of Isaiah synchronically. This paper will present a full-fledged overview of a variety of interpretations focused on the unity of Isaiah, especially chapters 36-39. Then it will canvass how the word of God, Torah, in Isaiah 36-39 plays a pivotal role in understanding the overall message of the book of Isaiah that for Zion success or failure is solely dependent on hearing the word of God.

불소를 포함시킨 가철성 교정장치용 Resin의 불소 방출과 굴곡강도에 관한 연구

한세현,손동수,장기택,김종철,이상훈 大韓小兒齒科學會 1997 大韓小兒齒科學會誌 Vol.24 No.2

For the purpose of investigating the continuous fluoride releasing from acrylic resin using removable appliances by incorporating fluoride into polymethylmethacrylate during the construction of the appliances, two kinds of fluoride were blended with acrylic powder and devided into five groups as follows. Group 1: no fluoride (control) Group 2: NaF 5 wt% Group 3: NaF 10 wt% Group 4: CaF₂ 5 wt% Group 5: CaF₂10 wt% Resin specimens were tested in vitro for fluoride release with fluoride electrode and flexural strength with Instron. The results were as follows; 1. After 24 hrs, released fluoride concentration(ppm) was the most in group 3(126.5±14.15) then, next, group 2(49.5±4.92), group 5(2.67±1.08), group 4(0.81±0.30),group 1(0.03±0.01) in order, but after 28 days, group 3(3.37± 0.31), group 5(1.25±0.25), group 4(0.74±0.19), group 2(0.68±0.07), group 1(0.03±0.01). 2. Fluoride releasing of NaF gruops were faster and more amount than CaF₂groups initially but decreased significantly, later. 3. Flexural strength(㎏/㎠ ) was the biggest in group 1(602.90±69.32), and then group 4(568.98±20.16), group 5(556.19±5.26), group 2(536.12±30.35), group 3(508.44±26.16) in order, the difference between control group and NaF GROUPS were statistically significant(p<0.05).

신경섬유종증 환자에게서 발생한 특발성 혈소판 감소증 1예

권세훈,김형호,강지인,장재혁,원경준,장재현,김상용,배학연 朝鮮大學校 附設 醫學硏究所 2006 The Medical Journal of Chosun University Vol.31 No.3

Idiopathic thrombocytopenic purpura is a disease characterized by thrombocytopenia in peripheral blood with positive anti-platelet antibody titer, no splenomegaly, the presence of megakarocyte. The causes of idiopathic thrombocytopenic purpura were usually related to autoimmune disease, infection and drugs. A 46-years-old man was admitted for evaluation of abdominal mass. He has many cafe-au-lait spots and nodules in almost skin for 30 years. Several years ago, he palpated mass in Lt. inguinal area. hIe has known the abdominal mass after checking abdomen CT in local clinic and visited our hospital for evaluation of abdominal mass. At admission, laboratory tests showed hemoglobin 12.5 g/dL, hematocrit 38.4 %, WBC 5,460 /㎣ (neutrophil 64.5%, lymphocyte 21.7%, monocyte 4.1%, eosinophil 5.4%), reticulocyte 0.7%, Platelet 52,000 /㎣, total protein 6.51 g/dL, albumin 3.80 g/dL, alkaline pohsphatase 161 IU/L, AST 110.7 IU/L, ALT 64.9 IU/L, total bilirubin 0.44 ㎎/dL, BUN 18.4 ㎎/dL, creatinine 0.79 ㎎/dL. Peripheral blood smear showed normocytic normochromic anemia, thrombocytopenia. Bone marrow aspiration smear showed normoplastic myeloid and erythroid precursor. The bone marrow biopsy section shows normocellular marrow (35%) for his age and mildly increasing myeloid cell lineage. We have experienced a case of idiopathic thrombocytopenic purpura in a patient being in neurofibromatosis and therefore reporting it with documentary records. 저자들은 신경섬유종증 환자에서 특별한 원인을 발견할 수 없었음에도 특발성 혈소판 감소증이 발생한 1예를 경험하였기에 문헌고찰과 함께 보고하는 바이다.

초등학교 특수학급 교육과정 편성·운영 현황과 문제점 및 개선방안에 관한 연구

이유훈,최세민,유장순,권택환 국립특수교육원 2006 특수교육연구 Vol.13 No.1

코일로 치료한 다발성 폐동정맥 기형 1예

김영훈,장재현,권세훈,장재혁,윤성호,이승일 朝鮮大學校 附設 醫學硏究所 2006 The Medical Journal of Chosun University Vol.31 No.3

A 29 year old female patient came with grade NYHA Fc IV dyspnea of 1 month. No abnormality was heard during auscultation. Arterial blood gas analysis done due to shortness of breath showed a decreased PO_(2) of 64.6 mmHg. Computerized tomography(CT) was checked due to multiple nodules seen in both lower lung fields of the chest X-ray. CT revealed multiple pulmonary arteriovenous malformations in both the mid and lower lung fields. Dyspnea was uncorrected by the application of oxygen. Coil embolization showed improvement of PO2 and dyspnea. The CT follow up at 9 months after the procedure showed no progression of the arteriovenous malformation without any additional symptoms nor dyspnea.

혈액 및 비장조직에서 일산화탄소 헤모글로빈 농도에 관한 연구 : A Comparison of CO-Hb in Blood and Spleen Specimens

이진훈,오세진,김유나,이진숙,유재훈,장성길 內務部 國立科學搜査硏究所 2001 國立 科學 搜査 硏究所 年報 Vol.33 No.-