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하순에 발생한 소낭포성 부속기 암종(Microcystic Adnexal carcinoma)의 치험례
장현석(Chang Hyun Suk),정무혁(Chung Moo Hyeok),장명진(Jang Myung Jin),김용관(Kim Yong Kwan),윤영호(Yoon Young Ho),박영욱(Park Young Yook) 대한구강악안면외과학회 1995 대한구강악안면외과학회지 Vol.21 No.3
Microcystic adnexal carcinoma(MAC) is a relatively uncommon tumor which was first described by Goldstern et al. In 1982 as most commonly presenting facial plaque or nodule. This slow-growing tumor is highly invasive, locally aggressive and deeply infiltrating neoplasm that has recently been recognized as a distinct clincopathologic entity. Microcystic adnexal carcinoma(MAC) is characterized by follicular and sweat gland differentiation and a stroma of dense collagen. Histologically the tumor shows solid islands and strands of squamous cells and sparse small ductal structures, some of them containing central cores of dense eosinophilic keratin. All of them are embedded in a sclerotic stroma. Microcystic adnexal carcinoma is nondescriptive and may be mistaken microscopically for other benign and malignant entities. Microscopically the tumor shows both pilar and sweat gland differentiation and involves the entire dermis and subcutaneous tissue, and invading perineural spaces. The tumor cells involve neryes perineurally or intraneurally. And they frequently extend into underlying structures such as muscle, fat, and bone. Although local recurrences are common after standard surgical excision, metastases have not been reported. Extensive resection of lesions may be necessary to extirpate widespread tumor, particularly those that are long standing or recurrent. Since significantly increasd morbidity is associated with recurrent disease, surgical and histopathologic techniques that stress examination of all margins are indispensable. A 52-year-old male complaining recurrent ulcer formation of the lower lip during past 15 years came to Dept. of Oral and Maxillofacial Surgery, Kangnam General Hospital for the diagnosis of the lip lesion. The incisional biopsy result was the microcystic adnexal carcinoma of the lower lip. As a treatment method we performed V-shaped local wide resection of the lesion and direct closure. Wde followed up the patient for 17 months after surgery. The patient did not show recurrent sign. We report this rare case of microcystic adnexal carcinoma of the lower lip with the review of literatures.
리클라이너 결합 성능 향상을 위한 섹터투스의 롤오버 저감 방법
이상훈(Sang Hoon Lee),최홍석(Hong Seok Choi),장명진(Myung Jin Chang),김동수(Dong Su Kim),배재호(Jae Ho Bae),고대철(Dae Cheol Ko),김병민(Byung Min Kim) 대한기계학회 2010 大韓機械學會論文集A Vol.34 No.11
본 연구에서는 자동차용 시트 리클라이너의 주요 부품인 섹터투스 결합부의 롤오버 저감을 위한 효과적인 성형 방법을 제시하였다. 기존의 성형 공정에 의하여 발생한 과도한 롤오버 때문에 섹터투스 내측기어와 결합 부품인 폴투스 외측기어 간의 정확한 결합이 이루어지지 않아 승차감 및 안전성이 저하된다. 따라서 성형 시, 소재를 롤오버 측으로 유동시켜 롤오버량을 최소화 해야 하며, 이를 위하여 국부 돌기형 다이, 코이닝 펀치를 이용한 방법 및 가변 역클리어런스를 통한 롤오버 저감 방법에 대해 유한요소해석으로 비교 평가 하였고, 이를 검증하기 위해 금형 제작 및 실험을 수행하였다. 실험 결과, 가변 역클리어런스를 이용한 방법이 롤오버 저감 및 금형 강도 측면에서 우수한 특성을 가지는 것을 확인할 수 있었다. In this study, effective forming methods for reducing the roll-over of a sector tooth, which is a main component of an automotive seat recliner, are proposed. Due to the large amount of roll-over, accurate contact between the inner gear of a sector tooth and the outer gear of a pawl tooth cannot be normally achieved; thus sensitivity and safety for the passengers decrease. To overcome the aforementioned drawback, we investigated the effect of flowcontrol forming methods involving local embossing die, coining punch, and VIC (Variable Inverse Clearance) on the roll-over depth by FE-analysis and an experiment. The results of a fine-blanking experiment for verifying the proposed methods showed that VIC type is decidedly superior from the aspects of reduction of roll-over and tool strength of the sector tooth.
한규택,장명진 釜慶大學校 1999 釜慶大學校 論文集 Vol.4 No.1
Grinding technology in modern industry society is focusing on research and development for grinding stone and mashining parts for the purpose of high accuracy and high efficiency of products. But, in order to equip the high technology and high accuracy of micro stone which is one of grinding stone, a continuous effort on R & D is required. In this study, the honing processing work of 2 cycle engine cylinder for motorcycle which has an open hole is carried out so as to investigate the boring and hone stone effects on accuracy of honing. As the experimental result of this study, we could conclude that it is possible to secure good conditions of honing by controlling and keeping appropriate cycle-time in the stage of boring for the prior step of honing.
열린 홀을 가진 2사이클 엔진실린더의 호닝가공시 호닝의 정밀도에 미치는 혼스톤의 영향
한규택,장명진 韓國工作機械學會 2000 한국생산제조학회지 Vol.9 No.3
Grinding technology in morden industry society is focusing on research and development for grinding stone and machin-ing parts for the purpose of high accuracy and high efficiency of products. But, in order to equip the high technology and high accuracy of micro stone which is one of grinding stone, a continuous effort on R & D is required. In this study, the honing processing work of 2 cycle engine cylinder for motorcycle which has an open hole is carried out so as to investigate the boring and hone stone effects on accuracy of honing. As the experimental result of this study, we could conclude that it is possible to secure good conditions of honing by controlling and keeping appropriate cycle-time in the stage of boring for the prior step of honing,
해면 정맥동 혈전증(Cavernous Sinus Thrombosis) 치험례
김경원,김용관,장명진,장현석 大韓顎顔面成形再建外科學會 1995 Maxillofacial Plastic Reconstructive Surgery Vol.17 No.4
Cavernous sinus thrombosis is one of the major complications of abscesses of the maxillofacial region. The initial symptoms of CST are usually pain in the eye and tenderness to pressure. this is associated with high fluctuating fever, chills, rapid pulse, and sweating. Venous obstruction subsequently causes edema of the eyelids, lacrimation, proptosis, chemosis and retinal hemorrhages. Blindness is sometimes an accompaniment of cavernous sinus thrombosis when the infection also involves the orbit. There is also cranial nerve involvement (oculomotor, troclear, abducence) and ophthalmoplegia, diminished or absent corneal reflex, ptosis, and dilation of the pupil occur. The terminal stages bring signs of advanced toxemia and meningitis. Infections of the face can cause a septic thrombosis of the cavernous sinus. Furunculosis and infected hair follicles in the nose are frequent causes. Extractions of maxillary anterior teeth in the presence of acute infection and especially curettage of the sockets under such circumstances can cause this condition. The infection is usually staphylococcal. The inflection may spread directly through the pterygoid plexus of veins and the pterygomaxillary space and then ascend into the sinus or it may spread directly from the pterygopalatine space to the orbit. This is possible because of the absence of valves in the angular, facial, and ophthalmic veins. The treatment is empirical antibiotic therapy followed by specific anbibiotic therapy based on blood or pus culture. The inflection usually involves one side, however, it may easily spread to the opposite side through the circulus sinus. Unless it is treated early, the prognosis is poor even in this doses. Occasionally the antibiotics will not adequately resolve the septic thrombus, and death ensues. the use of anticogulants to prevent venous thrombosis has been recommended, but the efficacy of such therapy has not been substantiated. Surgical access through eye enucleation has been suggested. We report a case which demonstrates cavernous sinus thrombosis by the infection after the functional neck dissection and the intraoral reconstruction with auriculomastoid fascio-cutaneous island flap.
이영조,이명철,강위창,이명묵,이동수,정준기,강원준,천기정,장명진 대한핵의학회 2000 핵의학 분자영상 Vol.34 No.1
Purpose: Dipyridamole stress myocardial perfusion SPECT could predict prognosis, however, long-term follow-up showed change of hazard ratio in patients with suspected coronary artery disease. We investigated how long normal SPECT could predict the benign prognosis on the long-term follow-up. Materials and Methods: We followed up 1169 patients and divided these patients into groups in whom coronary angiography were performed and were not. Total cardiac event rate and hard event rate were predicted using clinical, angiographic and SPECT findings. Predictive values of normal and abnormal SPECT were examined using survival analysis with Mantel-Haenszel method, multivariate Cox proportional hazard model analysis and newly developed statistical method to test time-invariance of hazard rate and changing point of this rate. Results: Reversible perfusion decrease on myocardial perfusion SPECT predicted higher total cardiac event rate independently and further to angiographic findings. However, myocardial SPECT showed independent but not incremental prognostic values for hard event rate. Hazard ratio of normal perfusion SPECT was changed significantly (p<0.001) and the changing point of hazard rate was 4.4 years of follow up. However, the ratio of abnormal SPECT was not. Conclusion: Dipyridamole stress myocardial perfusion SPECT provided independent prognostic information in patients with known and suspected coronary artery disease. Normal perfusion SPECT predicted least event rate for 4.4 years. (Korean J Nucl Med 2000;34:39-54)