상아질에 대한 저점도 복합레진의 자가접착에 관한 연구

조태희,최경규,박상혁,박상진 大韓齒科保存學會 2003 Restorative Dentistry & Endodontics Vol.28 No.3

The objectiveness of this study was to evaluate whether low-viscosity composite can bond effectively to dentin surface without bonding resin. The low-viscosity composites being 50wt% filler content were made by the inclusion of bonding resin of two self-etching systems(Clearfil SE Bond, Unifil Bond) varied with contents as 0, 10, 20, 30, 40, 50wt%. Exposed dentin surfaces of extracted 3rd molars are used. Dentin bond strengths were measured. The tests were carried out with a micro-shear device placed testing machine at a CHS of 1mm/min after a low-viscosity composite was filled into an iris cut from micro tygon tubind with internal diameter approximately 0.8mm and height of 1.0mm. 1. Flexural strength and modulus was increased with the addition of bonding resin. 2. Micro-shear bond strength to dentin was improved according to content of bonding resin irrespective of applying or not bonding resin in bonding procedure, and that of Clearfil SE Bond groups was higher than Unifil Bond. 3. There were no significant difference whether use of each bonding resin in bonding procedure for S-40, S-50, U-50(p>0.05). 4. In SEM examination, resin was well infiltrated into dentin after primed with self-etching primer only for S-50 and U-50 in spite of the formation of thinner hybrid layer. Low viscosity composite including some functional monomer may be used as dentin bonding resin without an intermediary bonding agent. It makes a simplified bonding procedure and foresees the possibility of self-adhesive restorative material.

폴리에스테르 섬유 감량시스템용 프로세서 타이트레이터 개발

조진호,이흥락,이종현,김명남,구성모,김무영,진경찬,유병희,강민수,김국진 경북대학교 센서기술연구소 1993 연차보고서 Vol.1993 No.-

폴리에스테르 섬유 감량시스템의 제어를 위해서는 처리조 내에서 감량되는 섬유가 목표 감량치에 도달했는지를 판단해 주는 장치가 필요하다. 본 연구에서는 가성소다용액의 초농도 및 섬유 감량 정도의 정확한 측정과 감량 종료시간의 산출 및 이에 따른 종료신호를 발생할 수 있는 폴리에스테르 섬유 감량기 전용의 자동적정장치를 개발하였다. To control caustic soda treatment system for the polyester fabric reduction, we need the device to determine that the fabric has been arrived target reduction value. In this study, we develope an automatic process titrator for the caustic soda treatment system. Major functions of the target titrating system are accurate measurements of the caustic soda concentration and then producing the end point signal for caustic soda treatment system.

요통환자의 요부 안정화 운동 방법이 통증감소에 미치는 효과에 대한 연구

조미숙,최윤희,김경,이지연,김진섭 대구대학교 특수교육재활과학연구소 2010 再活科學硏究 Vol.28 No.1

요통이란 근 골격의 이상으로 인한 통증으로 흉추 10번 이하의 허리부위에서 통증이 3일 이상 지속되는 경우를 말하며 인구의 약80% 이상이 일생을 통해 적어도 한번쯤은 겪게 된다. 이러한 요통은 체간의 연부조직의 손상이나 근력의 약화가 주요원인으로 작용하며, 이로 인해 통증, 지구력 감소, 관절가동범위 제한, 보행능력 감소를 유발한다. 이는 요통과 운동이 많은 관련성을 가지고 있다고 사료되며 그 중 요부 안정화 운동이 요통 환자의 통증 감소에 미치는 효과에 대해 선행연구들을 살펴봄으로써 효과적인 요부 안정화 운동방법과 적용에 도움을 주고자한다. Damage of soft tissue in lumbar interbody and weakness of muscular strength are the major causes of lower back pain, which results in inducing pain sensation, reducing muscular endurance and flexibility, limiting range of motion, and lowering locomotive capacity. Lower back pain is considered to be closely related to exercise. Exercise intervention in patients with low back pain being used as one of the spinal stabilization exercises and low back pain patients that exercise is effective in reducing the pain has been reported. Therefore, patients with low back pain of spinal stabilization exercises for pain reduction, previous studies on the effect of spinal stabilization exercise by examining how effective and will give help to apply.

이중에너지 방사선 흡수계측법을 이용한 성인 남녀의 장골 및 경골의 골밀도에 관한 연구

조용석,김경원,이경호,박현진,서상수,오상엽 대한악안면성형재건외과학회 2000 Maxillofacial Plastic Reconstructive Surgery Vol.22 No.3

Purpose : The aim of this study was to evaluate the bone mineral density of iliac and tibial bone which are frequently selected as autogenic bone graft donor sites, and to evaluate the efficiency of this method as a guideline for the selection of bone graft donor site. Materials and Methods : In this study 61 male and 70 female volunteers at Chungbuk National University Hospital were involved between Jan. 1998 to Sept. 1999. We measured bone mineral density of the iliac and the tibial bone using dual energy X-ray absorptiometry. We evaluated the data using the SAS system for Windows and bone mineral density of the lumbar was used for control. Results : Age showed the highest correlation in correlation matrix between physical and bone variables. Height and weight showed lower correlation of linear increment. In man, the change of bone density according to age demonstrated linear decrease irrespective of the lumbar, ilium, and tibia. In woman, the change of bone density according to age showed cubic form, which increased in the third and forth decade. So it had a peak bone mass on about 35 year-old, thereafter, the change of bone density slowly decreased until 50 year-old, but it rapidly decreased after 50 year-old and it slowly decreased again after 65 year-old. Both in all subjects and subject with osteoporosis, the change of bone mineral density according to age showed statistically significant decrease in lumbar and tibia, but ilium was irrespective. Conclusion : In patients of aged or with osteoporosis, ilium demonstrated less tendency of decrease in bone mineral density than tibla. So this preliminary study suggested that ilium seemed better donor site for autogenic bone graft than tibia.

악성 혈액질환에서 성공적인 동종골수이식 후 숙주 기질 미세환경의 구축

조상희,이제중,남찬은,최경상,정익주,이일권,김진희,박종태,김형준 대한조혈모세포이식학회 2002 대한조혈모세포이식학회지 Vol.7 No.1

인체의 골수는 간엽모세포를 함유하고 있으며 이들은 골수미세환경의 주된 세포들로 분화가 가능하여 조혈기능을 지지한다. 본 연구에서는 성별이 다른 동종조혈모세포이식 환경에서 조혈모세포의 완전 생착을 보이고, 이식 후 1년에서 8년이 지난 11예의 재생불량성 빈혈 및 백혈병 환자들을 대상으로 하여 골수에서 MSC를 분리하고 체외 확장을 통해 배양된 MSC에서 X 염색체 탐식자를 이용한 FISH 및 microsatellite polymorphism PCR 기법으로 그 기원을 확인하였다. 그 결과 조혈모세포는 완전히 공여자 기원으로 대치되었음에도 불구하고 MSC는 모두 수여자 기원임을 알 수 있어, 동종조혈모세포이식에서 미세환경의 구축은 수여자의 자가 생산에 의한 골수 간질세포에 의한 것으로 생각된다. Background: Human bone marrow (BM) contains mesenchymal stem cells (MSC) that can differentiate into various cells of mesenchymal origin. It remains a matter of controversy whether donor-derived stromal cells are capable of engraftment following hematopoietic stem cell transplantation (HSCT) or not. Methods: To determine if donor-derived stromal cells are transferred to the recipients of allogeneic HSCT, we investigated the characterization of MSC in 11 patients 1 to 8 years after sex mis-matched allogeneic HSCT in severe aplastic anemia and leukemia. Results: All patients had complete engraftment with donor- derived stem cells as shown by detection of donor type DNA in peripheral blood mononuclear cells. Following culture, MSC showed the expression of SH2 and SH4, but none of the hematopoietic markers of CD14, CD34, or CD45. MSC which can be differentiated to osteogenic lineage showed the genotype of recipient completely using FISH or PCR analysis. Conclusion: This study confirmed that MSC isolated from recipients of allogeneic HSCT in severe aplastic anemia and leukemia are not of donor genotype despite of full hematopoietic engraftment with donor type. Donor cells did not contribute to reconstitute the marrow microenvironment.

상악동에 발생한 국균증 2례

조용석,김경원,박현진,강지연,이건국,신향미 충북대학교 의학연구소 2001 忠北醫大學術誌 Vol.11 No.1

국균증은 토양, 유기체 그리고 모든 형태의 유기물 잔사에 광범위하게 존재하는 국균 (Aspergillus) 속에 의하여 발병한다.이 균의 포자는 공기 중에서 전염될 수 있으므로 가장 흔한 감염 진균 중 하나이다.부비동에 발생한 국균증은 초기 임상 증상이 만성 부비동염과 유사하며, 방사선 사진 등을 이용한 검사상도 일반 세균성 감염과 구별하기가 매우 어렵다.대개는 병리조직학적 검사로 국균을 확인해서 확진을 내리게된다.국균증의 치료는 외과적으로 상악동내의 병소를 완전히 제거하고 비강에로 충분한 공기를 통기시키는 것이 가장 중요하며 보조적으로 전신적인 항진균제를 사용해야한다. 증례는 40세와 24세인 여자 환자들로서 전신적으로는 건강했으며 임상적 방사선적으로 만성 상악동 증세를 보였다.상악동 근치술을 시행하면서 국균종으로 여겨지는 암갈색 덩어리들이 관찰되었고 술 후 병리조직검사상 국균증으로 진단되었다.국균증으로 진단 후 보조적으로 전신적 항진균제를 투약하였으며 재발없이 치유되었다. Aspergillus is a fungus of the Acetomyces class that is most commonly encountered in the human environment.Aspergillosis of the maxillary sinus is not common and it requires special consideration to diagnose and eradicate. The disease is characterized by a wide range of initial symptoms, and should be considered as a possible diagnosis in sinusitis refractory to antibiotics and antral lavage. Generally the diagnosis of sinus aspergillosis can be confirmed by histologic examination, however, characteristic radiographic appearance such as coherene of radiodense sinus concretions can be found by careful examination of the radiograms. The choice of treatment of maxillary sinus aspergillosis is radical surgery with adjunctive systemic antifungal therapy. We experienced two cases of maxillary sinus aspergillosis, which initially diagnosed as chronic maxillary sinusitis and showed a necrotic mass intraoperatively and histologically diagnosed as aspergillosis.We reports theses cases with review of literature.

Actinomycins에 의한 Adenosine Deaminase의 억제

김경자,조성진 한국미생물생명공학회 ( 구 한국산업미생물학회 ) 1996 한국미생물·생명공학회지 Vol.24 No.3

Adenosine deaminase inhibitor was extracted from culture broth of Streptomyces sp. strain V-8 with ethylacetate. The ethylacetate extract showed the characteristic UV absorption spectrum of actinomycins at 40~450 nm. The ethylacetate extract was compared with respect to inhibitory behavior against adenosine deaminase from calf intestinal mucosa with acinomycin D, -C complex and actinomycin V. The K_i values for actnomycin D, -C complex, and actinomycin V against adenosine deaminase were determined to be 9.9×10 exp (-6) M, 9.6×10 exp (-6) M and 9.3×10 exp (-6) M, respectively. The K_i value for the ethylacetate extract of culture broth against adenosine deaminase was determined to be 5.7×10 exp (-6) M. The kinetic paramenters of actionmycin D, -C complex, -V and ethylacetate extract of culture broth for adenosine deaminase were as follows: I_50=1.5×10 exp (-5) M (actinomycin D), 2.7×10 exp (-5) M (actinomycin C complex), 3.5×10 exp (-5) M (actinomycin V), 8.9×10 exp (-6) M (ethylacetate extract of culture broth). The adenosine deaminase was inhibited noncompetitively by ethylacetate extract of culture broth as well as by actinomycine D, -C complex and actinomycin V.

심장으로 전이된 악성 흑색종의 고식적 절제 1예

이경수,이현희,연태진,남기병,김동운,조명찬 대한순환기학회 2000 Korean Circulation Journal Vol.30 No.9

건축공사시방서에서의 KS규격의 국제인증방안에 관한 연구

김경식,이재섭,김용수,이규진,조용훈,최완철,전재열,이현수,구재동,이기환 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1

The purpose of this research is make out construction specifications for International Construction. Using off-shore products incur cost increase and longer delivery term of construction. and inconvenient on International Construction. Expand the range of additional local products conforming to performance. Life Cycle Cost. maintainability. operability. user's acceptability, etc.. And this study is suggest the standard formats and the techniques for construction specification.

수술중 수혈환자에 대한 임상적 고찰(Ⅲ)

최세진,서경덕,조희경 충남대학교 의과대학 지역사회의학연구소 1992 충남의대잡지 Vol.19 No.2

Over the Past several decades blood and blood components have been increasingly, recognized as medication rather than innocuous fluids used to replace modest blood lose at operation. But blood transfusions have the potential for many harmful side effects. This study was undertaken to evaluate transfusion accordings to department, sex, preoperative hemoglobin values, blood type, transfusion amounts and blood component therapy. Of a total 34.906 operative cases, 5,793 patients who recived a transfusion during operation were analyze statistically at the Department of anesthesiology, chungnam National University Hospital from January 1985 to September 1992. The results were as Follows : 1) The numbers of transfused patient among the 34,906 operative cases were 5,793 cases (16.57%). 2) The number of male transfused was greater than of female and third decade patients was the greatest incidence among the transfused patients. 3) Mostly hemoglobin value in preoperative state was maintained more than 10 mg/dl (85.75%). 4) The blood types of transfused blood were in the great order of A, B, O, AB type. 5) The percentage of one pint transfusion was gradually decreased and 2~5 pints transfusion was greatest percentage (60.11%). 6) As the amount of blood transfused was increased, the percentage of blood component therapy was increased, and mixed case PRC and FFP was the greatest incidence (46.02%).