보존료가 두부의 저장에 미치는 효과

김동한,신용서,전승호,백승화,이갑상 圓光大學校 1992 論文集 Vol.26 No.2

두부의 저장성 향상을 위해 보존료를 첨가하여 저장중 두부의 미생물상과 이화학적 변화를 검토하였다. 보존료 첨가에 의한 두부의 기호도 변화는 큰 차이가 없었으며 부패가 진행될 수록 적정산도와 amino태 및 ammonia태 질소량은 증가하였다. 두부는 acetic acid로 응고시키는 것이 CaCl₂보다 보존료에 의한 저장성 향상에 효과적이어서, acetic acid에 0.05% K-sorbate와 3% NaCl을 혼합첨가한 구는 저장중 이화학적 변화 및 호기성, 혐기성 세균수가 ?? cell/g수준인 점을 고려해 볼 때 30℃에서 48시간까지 저장이 가능하였다. In order to improve the shelf life of Tofu, the effects of preservatives on Tofu were investigated for microbiol and physicochemical changes during its storage. The sensory evaluation was not deteriorated by preservatives (0.05% K-sorbates). According to the progression of spoliage of Tofu, titratable acidity, and amino and ammonia nitrogen contents were increased. The effect of chemical preservatives on the shelf life of Tofu was shown to be stronger in the Tofu by acetic acid than in that by CaCl₂. The presence of 0. 05% K-sorbate and 3% NaCl as a preservative in Tofu by acetic acid extended it's shelf life upto 48 hrs at 30℃.

금속 도재 수복물을 이용한 청년기 법랑질 이형성증 환자의 수복증례

김홍준,이재훈,한동후,문홍석 大韓齒科補綴學會 2012 대한치과보철학회지 Vol.50 No.3

전반적인 치아변색과 치아마모가 심한 환자들이 심미를 위해 전치부 치료를 원하는 경우가 있다. 이런 경우 법랑질 이형성증에 대해 의심해 보아야 하며 임상 검사 및 방사선 검사를 통해 확인을 해야 한다. 법랑질 이형성증으로 판단된 경우 단지 심미적 목적 하에 전치부 치료만 하는 것은 바람직하지 못하다. 본 증례는 법랑질 이형성증으로 진단된 청년기 환자에서 대부분의 치아를 금속 도재 수복물로 치료하였다. 전반적인 변색 및 마모, 치관 파절이 있었으며, 좌측 전치부와 구치부에 교차교합이 있었다. 심미적, 기능적인 개선을 목적으로 하여 치아를 수복하였다. 전치부의 교차교합은 해소하였고, 구치부의 교차교합은 해소하지 않은 채로 진행하였다. 수복 이후 환자는 심미적, 기능적으로 만족하였으며, 3개월간의 임상관찰에서 특이할 문제없이 안정적으로 유지되어 보고하고자 한다. Some patients with generalized attrition and teeth discoloration may want their anterior teeth to be treated just for esthetic improvement. Ameologenesis imperfecta, however, should be considered for such patients prior to any treatment with thorough clinical and radiographic examination. If a patient is diagnosed with amelogenesis imperfecta, the treatment on anterior teeth just for esthetic purpose is not advisable. In this case, a young man with amelogenesis imperfecta was treated with metal-ceramic restorations. The patient had generalized attrition, teeth discoloration, crown fracture, and cross-bite on the left teeth. The ultimate objective of this treatment was to enhance esthetics and masticatory function. The cross-bite on the left anterior teeth was treated with restorations, whereas the reverse horizontal overlap was maintained on the posterior. The patient was satisfied with the result esthetically and functionally, and the third month recall examination revealed no pathologic changes associated with the treatment.

포도의 안토시아닌

김성복,이창후,한동현 高麗大學校 自然資源科學硏究所 1996 自然資源科學硏究 Vol.4 No.-

임상재료에서 분리된 녹농균(綠膿菌)의 혈청형과 약제감수성(藥劑感受性)에 대하여

조양자,한옥수,이동후 대한미생물학회 1976 大韓微生物學會誌 Vol.11 No.1

Two hundred and fourty eight strains of Pseudomonas aeruginosa isolated from clinical materials at Department of Bacteriology in National Medical Center and Han-iI Hospital during January to November in 1973, were typed serologically by Hommos agglutination method utlizing a routine set of 13 standard sera. In addition, their susceptiblity to several kinds of antibiotics were determind. The following results were obtained; One hundred seventy eight strains (71,77%) were typable with an occurrence of type T5 in 41 strains (16. 58%), type T5, in 36 (14.52%), type T3, in 24 strains (9. 68%) and smalI numbers of strains were distributed in other types. Seventy strains (28. 23%) were nontypable. The rate of isolation of Pseudomonas by clinical meterials was shown as 49. 19% in ous, 16. 53% in sputum and 8. 87% in urine; the isolation rate of 1. 21-3. 15% was shown in other clinical meteraIs and the definite distribution rate could not be observed in the serotype by different materials. Majorities of strains used in this experiment of isolates were resistant to common antibiotics but Gentamycin and Carbenicillin, known relativeIy as sensitive antibiotics to Pseudomonas aeruginosa, were observed resistance of 2. 44-10. 5% and 16. 69-57. 8%. Moreover any particular relationship between serotype and the sensitivity of antibiotics was not identified.

치근단 병소를 가진 치아의 발치 후 즉시 임플란트 식립 및 보철을 통한 심미성 회복

이재영,김지환,한동후 大韓齒科補綴學會 2012 대한치과보철학회지 Vol.50 No.3

Esthetics is important in restoring maxillary anterior area. Alveolar bone resorption and loss of interdental papilla may be minimized by immediate implantation. Previous studies showed successful results with the immediate implantation in healthy extraction socket, while many of these studies objected the immediate implantation into extraction sites with periapical lesions. Recent studies, however, reported successful results of the immediate implantation into extraction sites with periapical lesions with careful debridement of extraction sockets and general medication of antibiotics prior to implantation. A 73-year-old female visited the department of Prosthodontics in ○○ University Dental Hospital with the chief complaint of fallen post-core and crown on left maxillary incisor. Although the incisor was with vertical root fracture and periapical lesion, the immediate implantation following the extraction of tooth was planned. Thorough socket debridement, irrigation with chlorhexidine, and tetracycline soaking were followed by immediate implantation. The general medication of antibiotics (Moxicle Tab, 375 mg) was prescribed before and after the surgery. Immediate provisional restoration was delivered two days after the surgery, and the definitive metal-ceramic restoration was placed about six months later after reproducing the emergence profile from the provisional restoration. This case presents satisfying result esthetically and functionally upto two years after the placement of prosthesis with the harmonious gingival line and no loss of marginal bone. 상악 전치부는 심미적 회복이 강조되는 부위다. 발치 후 치유될 때까지 기다린다면 치조골 흡수와 치간 유두 수축을 방지할 수 없다. 일단 흡수된 조직을 재생하기 위해서는 추가적인 외과적 술식이 필요하고 치료 기간도 많이 소요된다. 발치 전 치조골과 치은 조직이 건강하다면 치주 조직을 보존 유지하기 위해 발치와 동시에 즉시 임플란트 식립을 고려할 수 있다. 특히 건전한 발치와에서의 즉시 임플란트 식립은 여러 논문에서 성공적인 결과를 보였다. 치근단 병소가 존재하는 치아의 발치 후 즉시 임플란트 식립에 대해서는 부정적인 반응을 보이는 연구가 많았으나, 최근에는 확실한 발치와의 육아조직제거와 전신적 항생제 투여 시 성공률이 높다는 결과도 보고되고 있다. 본 증례는 73세 여환으로 상악 좌측 중절치의 포스트-코어와 금속도재관이 탈락되었으며 임플란트 치료를 받고 싶다는 주소로 내원하였다. 치근단 병소와 수직적 치근 파절이 존재하였으나 치근단 병소가 있는 치아에서도 즉시 임플란트 식립의 성공사례가 여러 차례 보고되어 발치 및 즉시 임플란트 식립을 계획하였다. 발치 후 발치와 육아조직제거와 클로르헥시딘 용액 소독 및 tetracycline 용액으로 soaking을 시행한 후 임플란트를 식립하였으며 식립 전 후로 전신적 항생제를 투여하였다. 임플란트를 식립하면서 인상채득하여 2일 뒤 임시 보철물을 장착하였다. 약 6개월 뒤 치경부 형태를 재연하여 최종 인상 채득하였으며 최종 보철물을 장착하였다. 보철물 장착 후 2년까지 치은선이 인접치아와 조화를 이루고 변연골 흡수없이 심미적으로 만족할만한 결과를 얻었기에 보고하는 바이다.

열산화 처리에 따른 Ti-Ag 합금의 표면 특성

이지환,김호중,오근택,한동후,김경남 대한금속재료학회 2004 대한금속·재료학회지 Vol.42 No.6

Thermally oxidized Ti-Ag alloys, cp-Ti and Ti-A14V was investigated to find the proper heat treatment temperature and heat treatment duration for dental application. Surface microtopology by SEM showed oxide particles formed on all specimens treated at 600℃ and coarse, fully-crystallized lumps on specimens treated at 800℃. In macroscopic roughness measurement, Ra ranged from 0.083 to 0.29 }μm resulting from scratching by #600 emery paper; for non-contact method, from 0.34 to 2.84 nm resulting from the contour by oxide crystals on and between the ridges. The thicknesses of oxide layers were presumed to range from 100 to 250, 250 to 700, and over 1700 A for specimens treated at 400, 600, and 800℃, respectively. Oxide layers separated from the matrices on the cross sections of specimens atmosphere cooled after heat-treated at 800℃, which was not observed on those treated at 600℃. Oxidation behaviors of Ti-Ag alloys were observed to be similar to those of cp-Ti specimens by XRD analyses: TiO2 growth on surfaces followed by coexistence with Ti203's as treatment temperature increased; TiO growth followed by spread of both rutiles and Ti203's with temperature increase on specimens treated for 4 hours. Alumina was detected on Ti6A14V specimens, where microgaps between layers of alumina and titania considerably reduced the adhesive force of tinania layers on matrices. Conclusively, heat treatment temperature was more significant than treatment duration and the most desirable temperature was determined to be 600℃. (Received January 19, 2004)

LONGITUDINAL CLINICAL STUDY ON THE EFFICACY OF OSSEOINTEGRATED DENTAL IMPLANTS IN PARTIALLY EDENTULOUS KOREAN PATIENTS: AN 8-YEAR PROSPECTIVE STUDY

Han Dong-Hoo,Bae Hanna Eun-Kyong The Korean Academy of Prosthodonitics 2001 대한치과보철학회지 Vol.39 No.6

This study was to evaluate the clinical evidence for the success and the predictability of the osseointegrated dental implants in the partially edentulous Korean patients. 201 patients have received total of 502 Branemark implants, which were restored with either single or multiunit fixed superstructures at the Implants Clinic, Yonsei University Dental Hospital. The clinical and radiographic evaluations carried out on the patients for maximum 8 years were assessed annually for peri-implant inflammation, implant mobility (PTV), Plaque Index (PI), Gingival Index (GI), Bleeding on Probing (BOP), Keratinized Mucosa width and any changes in the surrounding bone level. The radiographs were taken at completion of the restoration, and annually thereafter. On the last recall appointments the patients filled a questionnaire consist of 29 questions in four categories. The cumulative non-failure rate of success was 93.9%. The first year mean bone loss was 0.3mm and less than 0.2mm annually thereafter. The periodontal parameters, keratinized tissue width and periotest values stabilized after initial changes in the first few years. The questionnaire has shown general satisfactory responses in all four aspect of dental implants treatment, including chewing efficacy, comfort, aesthetics and speech. The results support the predictability and success of the long-term rehabilitation of implant supported prostheses in partially edentulous Korean patients.

Texture Formation Behaviour during High-Temperature Plane Strain Compression Deformation in AZ91 Magnesium Alloy

Han, Dong Keun,Park, Min Soo,Kwon, Han Sang,Kim, Kwon Hoo Scientific.Net 2018 Materials Science Forum Vol. No.

<P>In previous study, it was investigated texture formation behaviour of high-temperature plane strain compression test at 723K, under a strain rate of 5.0. It was found that the main texture component and it was sharpness vary depending on deformation conditions. To clarify the characteristic of texture formation behaviour, it is necessary to investigate at various deformation condition. Therefore, in this study, is investigating the influence or texture formation behaviour and strain, strain rate at 673K. Three kinds of specimens with different initial textures were machined out from a rolled plate having a <0001> texture. The plane strain compression tests were conducted at a temperature 673K, and a strain rate of 5.0, with strain between-0.4 to-1.0. After compression tests, the specimens were immediately quenched in oil. The texture evolution was conducted by the Schulz reflection method using Cu Kα radiation and EBSD. Before the deformation, {0001} of specimen A was accumulated in the center of pole figure. The {0001} of specimen B was accumulated at the RD direction. The {0001} of specimen C was accumulated TD direction. As a result, work softening is observed in all the cases at the true stress - true strain curve for three types of specimens. After deformation, the maximum pole density of increases with increasing strain. In this study, it was found that the stable orientation was (0001)<100> and (0001)<110> during deformation.</P>

Morphometric analysis of maxillary alveolar regions for immediate implantation

Dong-Hoo Han,In-Ho Cha,Man-Soo Park,Hong-Seok Moon,Hyunmin Choi,Young-Bum Park,Hee-Jin Kim,Moon-Kyu Chung 대한치과보철학회 2013 The Journal of Advanced Prosthodontics Vol.5 No.4

PURPOSE The purpose of this study was to provide an actual guideline in determining the shape, diameter, and position of the implant in immediate implantation by the measurement of the thickness of facial and palatal plate, the thickness of cortical bone on the facial and palatal plate, the diameter of the root, and the distance between the roots in the cadavers. MATERIALS AND METHODS The horizontal sections of 20 maxillae were measured and analyzed to obtain the average values. Resin blocks were produced and cut serially at 1 mm intervals from the cervical line to the root apex. Images of each section were obtained and the following measurements were performed: The thickness of the facial and palatal residual bone at each root surface, the thickness of the facial and palatal cortical bone at the interdental region, the diameter of all roots of each section on the faciopalatal and mesiodistal diameter, and the interroot distance. Three specimens with measurements close to the average values were chosen and 3-dimensional images were reconstructed. RESULTS The thickness of the facial and palatal cortical bone at the interdental region in the maxilla, the buccal cortical bone was thicker in the posterior region compared to the anterior region. The interroot distance of the alveolar bone thickness between the roots increased from anterior to posterior region and from coronal to apical in the maxilla. CONCLUSION In this study, the limited results of the morphometric analysis of the alveolar ridge using the sections of maxilla in the cadavers may offer the useful information when planning and selecting optimal implant for immediate implantation in the maxilla.

도재용착주조금관에 사용되는 각종 합금에 따르는 치경부 변연의 변형에 관한 실험적 연구

한동후(Dong Hoo Han),이호용(Ho Yong Lee) 대한치과의사협회 1981 대한치과의사협회지 Vol.19 No.8