Carboxymethylcellulose(CMC)를 이용한 수용성 섬유 제조 특성에 관한 연구

최영민,정의현,박진원,신재균,Toshio, Kajiuchi,Hong, Kyung Jin 한국공업화학회 2003 응용화학 Vol.7 No.1

The manufacturing characteristics of water soluble fiber were studied using carboxymethycellulose(CMC) prepared from viscose rayon. Manufactiring process of CMC consists of mercerization and etherification stages. Experimental conditions are NaOH and MCA concentration and stop of reaction process. The former two steps of manufacturing process were reduced to one step. The solubility of CMC in one step process was compared with former process.

두부규격방사선사진에서 정상 sella turcica의 형태 및 크기에 관한 연구

최욱진,황의환,이상래 대한구강악안면방사선학회 2001 Imaging Science in Dentistry Vol.31 No.1

Purpose : To investigate the shape and size of normal sella turcica on cephalometric radiograms. Materials and Methods : Cephalometric radiograms of 200 orthodontic patients of age ranging 6-42 years were examined. All subjects were divided into 5 groups by age, the dimensional change of sella turcica was examined according to age, and the configurations of sella turcica floor, tuberculum sella, and anterior and posterior clinoid process were also observed. Results : The contours of sella turcica floor were flat type in 54% and concave type in 46%. The contours of tuberculum sella were right angle type in 55% and obtuse angle type in 44%; Acute angle type and plane type were very rare comprising 0.5%, 0.5% each. The configurations of anterior clinoid process were point type in 80% and round type In 20% of cases, and those of posterior clinoid processes were point type in 60% and round type in 40% of cases. The dimensional change of sella turcica according to age range had significantly positive linear trend to sella turcica length, height, and width until 25 years. After 26 years, no significant increase was found in sella turcica dimension. Especially, the sella turcica length had more proportional increase than that of sella turcica height and width. Conclusion : The results of this study revealed that the configuration of normal sella turcica was variable and the dimensional change of normal sella turcica had a linear tendency with age until 26 years.(Korean J Oral Maxillofac Radiol 2001;31:43-9)

근위 경골과 골절의 수술적 치료에서 예후 인자

최의성,박경진 충북대학교 의과대학 충북대학교 의학연구소 1997 忠北醫大學術誌 Vol.7 No.2

경골과 골절로 치료받은 17예의 환자를 대상으로 골절의 유형, 치료 방법, 정복의 정도, 골이식의 방법 및 동반 손상의 유무 등을 중심으로 치료 결과를 분석하여 예후에 영향을 미치는 인자를 조사하고자 하였다. 경골 외과의 분리 또는 설상형 골절의 제 1형이 가장 많았으며, 13예에서 수술적 정복 및 내고정이 시행되었다. 88%의 환자에서 만족할 만한 결과를 얻었는데, 동반 손상은 수술적으로 치료되었고, 결과에는 큰 영향이 없는 것으로 생각되었다. 경골과 골절에서 예후에 가장 영향을 미치는 인자는 골절의 정복 정도인 것으로 생각되었으며, 정확의 방법이나 고정 기간은 크게 문제되지 않았다. 5mm 이상의 관절면 불일치는 불만족한 결과를 초래하였다. 골이식과 만족한 결과와는 상관 관계는 보이지 않았으나, 큰 골 결손이 있는 경우 골이식은 꼭 필요할 것으로 생각되었다. Seventeen patients with fractures of the tibial plateau were reviewed and assessed in terms of fracture type, treatment method, adequacy of reduction, type of bone graft, associated ligamentous and meniscal injury, and overall result in an attempt to define factors important in the prediction of outcome. Cleavage or wedge-type fractures of lateral condylar plateau(type I) were the most common(29%). Thirteen of the 17 fractures were treated by open reduction and internal fixation, and three were treated by closed methods. Overall, 88% of the patients had a satisfactory result. Ligamentous and meniscal injuries were treated surgically and did not influence the final outcome. The single most important factor in predicting outcome in a patient with a tibial plateau fracture was the adequacy of reduction. The method of achieving the reduction and the length of the immobilization period of the knee were not as crucial. A residual step of greater than 5mm on the weight-bearing area was universally associated with an unsatisfactory result. Even there was no correlations between the satisfactory result with bone graft, bone graft to the large bone defect of tibial plateau fracture is seemed mandatory.

하악과두에 발생된 골연골종의 증례보고

최욱진,황의환,이상래 대한구강악안면방사선학회 2000 Imaging Science in Dentistry Vol.30 No.2

The osteochondroma, also known as osteocartilagenous exostosis, is one of the most common benign tumors of the axial skeleton, but is rarely found in the facial bones. When present, the tumor is most often reported to affect the mandibular coronoid process. Osteochondroma of the mandibular condyle is extremely rare and may cause signs and symptoms like those seen in patients with temporomandibular joint dysfunction. Sometimes, differentiation between osteochondroma and condylar hyperplasia is not possible on histologic grounds alone, but the radiographic and intraoperative findings together are usually sufficient to establish a definite diagnosis, This report reviews the literature concerning osteochondroma, especially of the maxillofacial region, and describes a case of osteochon droma of the condyle. (Korean J Oral Maxillofac Radiol 2000; 30: 138-143)

악성 섬유성 조직구종에 관한 연구

최의환,오필교,김영진 大韓口腔顎顔面 放射線學會 1994 Imaging Science in Dentistry Vol.24 No.2

Malignant fibrous histiocytoma(MFH) is relatively rare in the oro-maxillofacial region, particularly in the oral cavity. MFH usually arise in the extremities, the thigh being the most common site. The incidence of malignant fibrous histiocytoma in bones is rather low compared with that in soft tissues. MFH is predominant in the 40s and 50s. Histologically, the lesion are said to show high cellularity with fibrous stroma, cellular and unclear pleomorphism, and admixture of fibroblast-like spindle cells, which tend to be arranged in whorls or cartwheel or storiform patterns, rounded mononuclear cells and multinucleated giant cells. The cells frequently have abundant eosinophilic cytoplasm which has a foamy or vesicular appearance. Treatment consists of varying combinations of radiation therapy, chemotherapy, and surgery. We have observed a case of malignant fibrous histiocytoma occured in the right maxilla of 32-year-old woman.

슬관절에 히야루론산 주입후 발생한 활막성 연골종증 : 증례 보고

최의성,김용민,김동수,손현철,박경진,조병기,배승환 충북대학교 의과대학 충북대학교 의학연구소 2009 忠北醫大學術誌 Vol.18 No.2

활막성 연골종증은 비교적 드문 양성 종양으로 관절내 활액막 결체조직의 양성 반응성 이형성에 의해 여러 개의 연골성 결절을 형성하고 이것이 관절내로 유리되어 유리체를 형성하는 질환으로 주로 슬관절에 발생한다. 활막성 연골종증의 정확한 발생 기전은 아직 밝혀지지 않았으나 외상, 감염 등이 원인으로 제시되고 있다. 저자들은 슬관절 내 히야루론산 주입후 발생한 슬관절내 활막성 연골종증을 1 례 경험하였으며, 관절경적 제거술을 통해 만족스런 결과를 얻었다. As a relatively rare benign tumor, synovial chondromatosis forms several cartilaginous nodules by the benign reactive metaplasia of synovial connective tissues within joints, which are loosed into the joints and cause a disease forming loose body mainly in knee joint. Accurate mechanism of synovial chondromatosis has not been clarified yet; however, trauma, infections and others have been suggested as its possible causes. The authors of this study experienced an example of a patient with synovial chondromatosis in knee joint occurred after the injection of hyaluronic acid in the joints and had a satisfactory outcome through the arthroscopic resection.

CMC계 수용성 섬유의 물리적 강도향상 첨가제에 관한 연구

최영민,정의현,박진원,신재균,Kajiuchi, Toshio,Hong, Kyung jin 한국공업화학회 2003 응용화학 Vol.7 No.2

The aim of this research was to develope the additive for physical strength improvement of water soluble fiber(CMC) using viscose rayon. Experimental parameters were reaction time and concentration of MgSo₄. Firstly, solubility of carboxymethylcellulose(CMC) according to the addition of MgSO₄ was tested at room temperature with water. Secondly, through the examination of the FT-IR spectra, absorption band caused by hydroxyl group and carboxyl group was confirmed.

스포츠센터 소비자의 불평행동의도에 관한 연구

정의권,최영진 중앙대학교 스포츠과학연구소 2003 體育硏究 Vol.- No.18

In order to understand both sports center consumers’ intention of complaint action by demographic characteristics and the influence consumers’ dissatisfaction has on the intention of complaint action, I conducted a questionnaire survey of 192 male and female members of three sports centers located in Seoul area. The findings are as follows: 1. Examining whether consumers have dissatisfaction and complaint action with sports centers, the results reveal that they express less complaint action than their level of dissatisfaction. 2. Examining consumers’ intention of complaint action, personal action is appeared to be higher than formal one. 3. Looking into the difference between the intentions of complaint action by sports center consumers’ demographic characteristics, significant differences are appeared in schooling and family income in both formal and personal actions. And, in general, the higher schooling and family income level, the more the intention of complaint action. 4. Investigating the influence sports center consumers’ dissatisfaction has on the intention of complaint action, it has significant influence on the intention of personal action, but on that of formal action.

하악 과두 과형성증에 관한 방사선학적 연구

김영진,최의환,김재덕,김진수 大韓口腔顎顔面 放射線學會 1995 Imaging Science in Dentistry Vol.25 No.2

Condylar hyperplasia is a self-limiting condition characterized by a slowly progressing, enlargement of the mandible that results in facial asymmetry and a crossbite malocclusion. The facial asymmetry, open bite or crossbite, and radiographic evidence of an enlarged condyle confirm the diagnosis of condylar hyperplasia. The etiology of the condition is unknown. This condition usually first becomes apparent during the second decade of life, when one condyle continues to grow while the other is no longer active. Radiographically, the condyle may appear enlarged or the neck of the condyle may be elongated or both may occur, Sometimes, however, no radiographically demonstrable condylar abnormality will be noted. Surgical correction with subcondylar osteotomy is the treatment of choice. We have observed two cases of condylar hyperplasia occurred in the mandibular condyle of 24-year-old and 35-year-old women. We obtained that two cases were shown the followed results; 1. Clinically, both cases was unilaterally developed on C/C area, with temporomandibular disorders and pain, facial asymmetry and malocclusion. 2. Radiographically, hyperplastic mass confined to the condyle. 3. Histopathologically, these cases shown increased hypertrophic region in parts, and lamellated bone with irregular trabeculae.

파노라마 방사선사진에서 하악관과 이공의 관찰되는 정도

정성진,최의환,김재덕 대한구강악안면방사선학회 2001 Imaging Science in Dentistry Vol.31 No.3

Purpose : To determine the head position that the superior border of the mandibular canal as well as mental foramen can be more clearly visualized in panoramic radiography Materials and Methods : Ten dry mandibles were radiographed bilaterally using PM 2002 CC panoramic machine. A 20 mm thick aluminium filter was added to the slit collimator to obtain radiographs with acceptable density. The specimens were tilted by 2, 4, 6, 8, and 10 degrees downward with and without radiopaque markers. Radiopaque markers were inserted into the mandibular canals and the mental canals of each side of the specimens to serve as reference image when assessing the radiographs. The visibility of the mandibular canal and the mental foramen was estimated by 4 observers on all radiographs. The obtained results were analyzed statistically. Results : Mandibular canals were significantly more clearly visible in the radiographs with 4 and 6 degree downward position on both sides (P〈0.05). Mental foramens were significantly more clearly visible in the radiographs with 4, 6, and 8 degree downward on right side and 6 degree downward on left side (P〈0.05). There was not significant difference between right and left sides. Conclusion : Panoramic radiographs with 4 to 6 degree downward tilting could be valuable in locating the mandibular canal as well as the mental foramen. (Korean J Oral Maxillofac Radiol 2001; 31 : 153-8)