Die spacer의 두께에 따른 복합레진 inlay의 치은 변연부 미세누출 및 접착양태에 관한 연구

홍찬의,박태일,신동훈 大韓齒科保存學會 1995 Restorative Dentistry & Endodontics Vol.20 No.1

AbstractThis experiment was performed to observe the adhesion pattern and microleakage in the gingival margin according to variation in the resin cement thickness which results from thickness of Die spacer, which is considered to effect the adaptability of the composite resin inlays. Clearfil CR inlays were fabricated on stone models with CR Sep applicated once and Nice fit twice, 4 times, and 6 times each. After 2nd curing within the CRC-100 oven, CR inlays were cemented with CR inlay cement. Dye (2% methylene blue) penetration and adhesion pattern were evaluated after sectioning of gingival margin into 3 pieces.The results were as follows ; 1. The thickness of resin cement showed unevenchanging pattern with that of die spacer, namely, it was increased until 4 times' application of Nice-Fit but was decreased with 6 times' application of that. 2. The degree of dye penetration wasn't affected by cement thickness within a limited value. 3. Most of dye penetration was shown through the interface between cement and enamel rather than the interface between cement and CR inlay. This shows that the affinity of resin cement for CR inlay was superior to the adhesive strength with tooth structure. 4. No gap was found at the interface between enamel and cement but some showed separa- tion between dentin and cement. It is concidered that the contraction force of cement was less than the bond strength with the enamel. 5. Lots of voids were found in the CR inlay and resin cement. There was a pooling tendency of bonding agent and cement in the axiogingival line angle portion. 6. In some specimens, cracks were shown in enamel margin. From this it could be conside- red that cavity preparation and surface treatment weakened the tooth structure.

Large Balloon Dilatation for Congenital Esophageal Stenosis in Children

Tae?Hyung Kim,Hong?Tao Hu,Ji Hoon Shin 대한인터벤션영상기술학회 2018 대한인터벤션영상기술학회지 Vol.21 No.1

무증상으로 발견된 담낭-담관 누공을 동반한 Mirizzi 증후군 1예

홍진희,전태주,서지영,서동대,오태훈,신원창,최원충,신은아,김기환 인제대학교 2009 仁濟醫學 Vol.30 No.-

Mirizzi's syndrome is a rare complication of the gallstone disease, characterized by narrowing of the common bile duct (CBD) due to chronic extrinsic compression of an impacted gallstone in the cystic duct or the neck of the gallbladder. The impacted gallstone may erode into the bile duct, causing cholecystocholedochal fistula. The patients generally have history of repeated attacks of jaundice and abdominal pain. But there is no report about asymptomatic Mirizzi syndrome with cholecystocholedochal fistula which were found incidentally. So herein we present our clinical experience with a case of asymptomatic Mirizzi syndrome with cholecystocholedochal fistula in a young female.

임플란트 주위 조직 보존을 위한 임플란트 경부의 디자인에 관한 고찰

김홍준,김지환,김성태,이재훈,박영범 大韓齒科保存學會 2011 Restorative Dentistry & Endodontics Vol.36 No.6

연구 목적: 임플란트 식립 후 변연골 흡수에 따라 임플란트 주위 연조직이 재구성되며, 이에 따라 치료의 예후 및 심미성 등에 영향을 주게 된다. 그러므로 임플란트 경부 주위 골조직 보존을 위한 임플란트 경부에 다양한 디자인이 연구되고 있다. 본 고찰의 목적은 초기 변연골 흡수의 원인과 이에 따른 임플란트 주위의 연조직 변화에 대해 고찰하고, 어떠한 임플란트 경부 디자인이 임플란트 주위 조직의 보존에 유리한 지 알아보고자 한다. 연구 재료 및 방법: Pubmed database에서 임플란트 초기 변연골 흡수의 원인과 관련된 논문과 임플란트 경부의 여러 디자인에 관한 논문을 검색하여 분석하였다. 임플란트 경부 디자인은 one piece implant, two piece implant, internal hex abutment, external hex abutment, taper joint connection, butt joint connection, scalloped design abutment, platform switching concept에 관해 검토하였다. 결과: 초기의 임플란트 주위 조직 보존에 대하여 one piece implant가 two piece implant보다 유리한 것으로 여러 임상적, 실험적 연구가 있다. Two piece implant에서는 internal hex abutment가 external hex abutment보다, taper joint connection가 butt joint connection보다 유리할 것으로 보여진다. Scalloped design abutment에 대해서는 논쟁의 여지가 있어 더 많은 연구가 필요할 것으로 판단된다. Platform switching concept은 그 원인이 명확히 밝혀지지는 않았으나 임상적, 실험적으로 초기 임플란트 주위 조직 보존에 대해 유리한 것으로 판단된다. 결론: 임플란트 경부의 디자인마다 각각의 장단점이 있고 추가적인 연구가 더 필요한 제한이 있지만 현재까지의 선행 연구들을 분석 종합해 보면 초기 임플란트 주위 조직 보존을 고려한다면 가능한 경우 one piece implant가 유리할 것으로 판단되며, 보철적인 문제나 다른 이유로 인하여 two piece implant를 고려할 경우 platform switching concept, internal connection abutment, taper joint connection을 이용하는 것이 임플란트 주위 조직 보존에 좀더 유리할 것으로 사료된다 Purpose: The peri-implant soft tissue is remodeled by the initial marginal bone resorption affecting the prognosis and esthetic result of treatment. Thus various designs on implant neck design are studied to preserve peri-implant bone. The purpose of this study is to review on the causes of initial marginal bone resorption, the configuration of peri-implant soft tissue, and the implant crestal module favorable in preserving peri-implant tissue. Materials and methods: The studies on the causes of initial marginal bone resorption and the implant crestal modules are researched and reviewed using Pubmed database. The implant crestal modules including one piece and two-piece implant, internal and external hex abutment, taper and butt joint connection, scalloped design abutment, and platform switching concept are reviewed. Results: A number of clinical and experimental studies preferred one piece implant to two-piece in preserving initial peri-implant tissue. For two piece implants, internal hex abutment and taper joint connection appear more favorable than external hex abutment and butt joint connection relatively. Controversial issues still exist on scalloped design requiring more studies on it. Although the rationale is not certain, the concept of platform switching seems favorable in preserving initial peri-implant tissue based on clinical and experimental studies. Conclusion: Each implant crestal module contains its own advantages and disadvantages with various controversial issues. In the aspect of preservation of initial peri-implant tissue, however, one-piece implant seems beneficial. In cases when two-piece implant is more appropriate due to prosthodontic concerns or any other problems, the application of platform switching concept, internal connection abutment, and taper joint connection may be favorable for the preservation of peri-implant tissues.

豆乳 및 Cheese Whey를 利用한 乳酸醱酵

洪在訓,金永培,劉太鍾 建陽大學校 1992 建陽論叢 Vol.- No.1

豆乳를 이용한 乳酸醱酵時 cheese whey를 첨가함으로써 乳酸菌의 醱酵能 및 風味에 미치는 영향을 조사, 醱酵乳로서의 타당성을 검토하였다. 발효용 균주로는 L.bulgaicus와 S.thermophilus의 1:1 혼합 starter를 이용하였으며 얻어진 결과는 다음과 같았다. 유산균의 생육과 산생성, cure 형성에 있어서 가장 적당한 soy milk와 whey의 혼합비율은 9:1이었고 soy milk-whey-mixture (SWM)에 lactose 첨가에 의한 균생육 및 산생성능이 향상되었다. 본 실험조건에서 SWM, soy milk, skim milk 에서 검출된 carbonyl compounds는 acetaldehyde, aceton, tehanol, hexanal, diacetyl등 이었으며 그 중 acetaldehyde가 가장 많았다. 또한 SWM의 amino acid 含量은 glutamic acid, aspartic acid, arginine etc. 順으로 나타났으며 그 영양적 가치는 skim milk나 soy milk에 뒤지지 않았다. 官能檢査의 결과는 色에 있어서 SWM, skim milk, soy milk 사이에 유의차가 없었으며 냄새에서는 skim milk와 다른 두 시료간에 1% 유의차가 있었고 맛에서는 skim milk와 soy milk 사이에 5% 유의차가 있었다. Cheese whey was added to soy milk for lactic acid fermentation by L. bularicus + S.thermophilus and its effects on cell growth, acid production and flavor were investigated. Bacterial growth, acid production and acid formation were best in soy milk concluding 10% of whey. Acid production and bacterial growth were improved by adding of lactose to soy milk-whey mixture (SWM). As volatile carbonyl compounds of SWM< acetaldehyde, acetone, ethanol, hexanal and diacetyl were detected by gas chromatography. AMong them, the amont of acetaldehyde are the largest. The result of sensory test showed no significant difference in taste between fermented skim milk and SWM, and SWM, and SWM and soy milk.

콩에서 발생하는 강낭콩일반모자이크바이러스(BCMV)와 땅콩위축바이러스(PSV)의 저항성 평가

이영훈, 윤영남, 강범규, 김현영, 최만수, 구성철, 김현태, 윤홍태, 이수헌, 백인열 忠北大學校 農業科學硏究所 2014 農業科學硏究 Vol.30 No.2

It has been reported several viral diseases in soybean. The occurrence of Bean common mosaic virus and Peanut stunt virus are able to induce severe problem because the main breeding target for viral disease was focused on Soybean mosaic virus. BCMV is a spcies of the genus Potyvirus of the family Potyviridae. BCMV reduces yield by as much as 80% and also adversely affects seed quality in common bean. BCMV has a worldwide distribution because of its high rates 35% of transmission via seeds produced by plants systemically infected prior to bloom. PSV is a species of the genus Cucumovirus of the family Bromoviridae. PSV has been reported to be economically damaging on beans worldwide. Although the virus is reportedly seed transmissible at very low rates, infected plants rarely produce pods with normal viable seeds. The most satisfactory management method of viral diseases such as BCMV and PSV is the use of resistant cultivars and healthy seed. For the overcome of genetic resistance by new virus such as BCMV and PSV, virus diseases monitoring and researches need to study deeply and continually. In this study, we conducted the resistance screen on BCMV and PSV for selection of resistance cultivars. We inoculated on 128 cultivars with PSV and BCMV respectively. These cultivars were classified through pathogenic response such as resistance, necrosis and susceptibility. In addition, 99 and 66 resistant cultivars were confirmed against PSV and BCMV respectively.

강인한 퍼지 디지털 PI+D 제어 시스템의 설계 및 구현

권태익,이재홍,김승철,설재훈,임영도 동아대학교 정보기술연구소 2001 情報通信硏究所論文誌 Vol.9 No.1

In this paper, Fuzzy Digital PI+D Controller plans for load, noise, plant change, Fuzzy Controller makes use of simple four rule and membership function, and plant used three phase Induction Motor. Characteristic of system compared from experimentation respectively the proposed Control System, Digital PID Control and Digital PI+D Control System.

통신시스템 유지보수를 위한 최적 예비 회로팩 수량 결정에 관한 연구

이태훈,임건우,윤홍상 광주대학교 1997 産業技術硏究 Vol.8 No.-

교환 및 통신시스템을 운용할 때, 서비스 지속시간을 만족하면서 경제성 측면에서 최적 예비 회로팩의 수량을 산정하는 것은 중요한 문제가 된다. 본 연구에서는 각 회로팩에 대해 고장율과 실장 개수, 서비스 지속율 등에 따라 예비 회로팩 수량을 결정하는 모델을 제시하였고 프로그램을 위한 설계방안을 제시하고 있다. In an environment operating switching and transmission systems, it is a critical factor for the operation to decide the quantity of optimum reserved PBA (Printed Board Assembly) considering the economic factors while satisfying the service continuity time. The paper suggests a model which can decide the number of spare PBA's depending on the failure rate, the quantity of the installed elements, and the rate of service continuity for each PBA. It also delivers a design method for actual computer programming covering the subject.

生化湯에 關한 文獻的 考察

孫泰勳,鄭鎭鴻 대전대학교 한의학연구소 2001 혜화의학회지 Vol.9 No.2

In the literatual study on the Saenghwatang, the results were as follows. 1.Saenghwang is composed of Danggui, Chunkoong, Doin, Kunkang and Kamcho.Saenghwang was with Ikmohwan and Ikmocho for the purpose of treatment of puerperal congestive pain 2.Activating blood circulation and congestion, warming body & blood circulation, increasing blood flood, controlling pain, removing the coldness & congestion and creating new blood are the effects of Saenghwatang. 3.The indications of Saenghwatang are no excretion of pilleus, puerperal coldness and hotness, congestive pain, dizziness, the coldness of extremities, chiorrhea, bleeding, asthma and etc. 4.Saenghwatang have the effects of puerperal contractility in theuterus, activating lactation, removing inflammation and antiplat-elet aggregation. Therefore it can be applied to puerperal disease, hysteromyoma, endopelvic congestion, postabortal contineous bleeding endometritis, menorrhalgis, gastralgia of cold congestion, infertility of cold uterus; every congestive symtoms.

요추부 유합 후 인접분절 각운동의 변화

김홍태,박봉훈,천동욱,김형표,정재호 대한척추외과학회 1995 대한척추외과학회지 Vol.2 No.1

A lumbar fusion may influence biomechanically on the remained unfused segments to take over the lost motions. The adjacent segments to fusion particulatly will experience an additional motional stress following a fusion, and then various late complications can occur. Moreover, the amount of this stress may differ according to the levels and extents of the fusions. The aim of this study is to evalu- ate this motional stress in different levels of fusion. A retrospective review of flexion and extension lateral radiograghs was undertaken for 142 consec- utive patients who had undergone various fusions in the lumbar region. Included in this study were the patients who had performed active daily livings after surgery and followed for minimum of two years. They were 60 males and 82 females, having mean age of 46.7(range 14-72). There were three posterior fusions, 123 lateral fusions, and 16 interbody fusions. The extent of fusions were one seg- ment in 71, two segments in 53, three segments in 16, and four segments in two patients. The follow- up period was 53 months in average(range 2-15 years). The intervertebral angles were measured on the flexion/extension lateral radiographs, and then the calculated intervertebral angular motions at follow-up periods were compared with those of preoperative values. The average increases of angular motion at the adjacent segments to fusions were 2.3˚at L1-2 seg- ment(ranging 0˚to 5˚increase),2.5˚at L2-3 segment(ranging 1˚decrease to 8˚increase), 2.9˚at L3-4 segment (ranging 3˚decrease to 12˚increase), 6.7˚at L4-5 segment(ranging 2˚to 18˚ increase), and 1.5˚at L5-S1 segment(ranging 5˚decrease to 7˚increase). The average increases of the above and below adjacent segments to fusions were 3.3˚(ranging 3˚decrease to 18˚increase) and 1.7˚(ranging 5˚decrease to 12˚increase) respectively. There were no significant differences in the changes of angular motion according to the extents of fusion and during these follow-up periods. In conclusion, the angular motions at the adjacent segment to fusions increased most signficantly at L4-5 segment regardless of the fusion sites whether it is below or above a fusion. Excluding the L4-5 segment, the angular motions at the above adjacent segments to fusion increased significantly compared to those at the below adjacent segments. The late complications at adjacent segments to lumbar fusions are expected to appear preferably at these segments.