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정종철,박준아,김영운,정숭룡,이종호,류선열,Jeong, Jong-Cheol,Park, Jun-Aa,Kim, Young-Woon,Jung, Soong-Rhyong,Lee, Jong-Ho,Ryu, Sun-Youl 대한악안면성형재건외과학회 1994 Maxillofacial Plastic Reconstructive Surgery Vol.16 No.3
Tissue expansion has now been widely used in various soft tissue defects and deformities. It is to reconstruct the lesion site by providing donor tissue of the same color, texture, and similar thickness and sensation with minimal scar formation and minor donor site morbidity. It is achieved through using a temporary expander capable of accumulating normal saline. Internal pressure from expander exerts its force on the flap, which gradually expands to provide additional tissue for reconstruction. We have applied tissue expander in three patients. The first case was soft tissue loss on the left forehead. The second case was multiple scar formation on the left mandibular angle and upper cervical area. The third case was scar contraction on the right cheek. All cases have been successfully reconstructed without complications. 저자들은 1예의 전두부 연조직 결손과 2예의 경부와 안면에 형성된 다발성의 반혼구축 환자에서 조직확장술올 이용하여 양호한 두경부의 연조직 재건을 얻을 수 있었다. 다양한 연조직의 결손이나 변형에서 적절한 증례를 선택하여 올바르게 적용할 경우 조직 확장술은 유용한 재건방법이 될 수 있을 것으로 생각된다.
정종철,김건중,최재선,성대경,김호성,이계혁,Jeong, Jong-Cheol,Kim, Keon-Jung,Choi, Jae-Sun,Sung, Dae-Kyung,Kim, Ho-Sung,Lee, Gye-Hyeok 대한악안면성형재건외과학회 1998 Maxillofacial Plastic Reconstructive Surgery Vol.20 No.2
Compound comminuted mandibular fracture is defined as the presence of multiple fracture lines with open wound resulting in many small pieces within the same area. The incidence of mandibular comminution is difficult to determine but reported as 2.7~18.6 % incidence among mandibular fractures. There are controversies in the treatment of mandibular comminuted fractures. Treatment of comminuted mandibular fracture has traditionally involved closed reduction in an effort to avoid stripping periostcum from the bony segments, but rigid internal rigid fixation is used more popular at present. The extent of comminution, displacement of bony fragments and patient general conditions are important factors in decision of the treatment methods. When significant bone displacement is present, it is necessary to reduce these comminuted fragments to an anatomic, pretraumatic relationship to restore facial form and function. In these cases, ORIF allows anantomic reduction of comminuted segments as well as pretraumatic occlusion. Gentle handling of the soft tissue, rigid fixation of bony fragments and adequate immobilization are essential for reducing the complications. This is the report the incidence, causes, complications and treatment of the patients who visited our department for compound comminuted mandibular fractures.
색소성 융기성 피부섬유육종(Pigmented Dermatofibrosarcoma protuberans)의 치험례
이정삼(Jeong Sam Lee),김건중(Kean Jung Kim),정종철(Jong Cheol Jeong),민홍기(Heung Ki Min),최재선(Jae Sun Choi),박홈례(Heum Rye Park),박성혜(Sung Hye Park),하승연(Seung Yon Ha) 대한구강악안면외과학회 1997 대한구강악안면외과학회지 Vol.23 No.1
Bednar tumor was described by Bednar in 1957. The histologic pattern of this tumor shows similar to dermatofibrosarcoma protuberans (DFSP) but melanin pigments are scattered within the tumor, It s rare neoplasm accounting for approximately 1-5% of all case of DFSP. Clinically, this tumor is considered to be intermediated malignancy, because of slow growth and frequent local recurrence and lack of distant metastasis. The majority are located on the trunk and the upper and lower extremities, but extremely rate in the head and neck area. Microscopically, this tumor is characterized by tight storiform spindle cells and long slender cells that admixed with a small population of melanin containing dendritic cells. This dendritic cells are the primary features distinguising this lesion from conventional DFSP. Complete surgical excision and close follow-up case are necessany for this neoplasm because of probable intermediate malignancy. A patient was admitted to Our Department of Oral and Maxillofacial Surgery due to swelling on right parotid area and numbness of the right lower lip on September, 1994, By clinical examinations and C-T finding, we dignosed tentatively as myxoma or pleomorphic adenoma. Surgical excision of this tumor was performed with parotidectomy and mandibular osteotomy under the frozen biopsy. By final microscopic and electromicroscopic examination and immunohistochemical study, this tumor was diagnosed as Bednar tumor. So, we report a case of pigmented DFSP with review of literatures.
김정석(Jung-Seok Kim),정종철(Jeong-Cheol Cheong),한정우(Jeong-Woo Han),이상진(Sang-Jin Lee),조세현(Se-Hyun Cho),서승일(Sung-Il Seo) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
This paper explains performance assessment on the composite train carbody for the Korean tilting train. The composite carbody with length of 23m was manufactured as a sandwich structure composed of a aluminium honeycomb core and woven fabric carbon/epoxy face. In order to evaluate performance of the composite carbody, the static, fatigue and fire test were conducted. The static test was performed under Japanese industrial standard. The fatigue test was conducted for 2×10?cycles. During the fatigue test, fatigue cracks of the composite carbody and steel underframe were inspected by the nondestructive tests using X-ray and liquid penetrant. The fire test was performed under the arson scenario of Daegu fire accicent. From the fatigue test, no fatigue crack was detected. There were no severe fire damages and fire propagation in the fire test.
김정석(Kim Jung Seok),정종철(Jeong Jong Cheol),한정우(Han Jeong Woo),한성호(Han Seong Ho),조세현(Cho Sae Hyun),서승일(Seo Sung Il) 한국철도학회 2006 한국철도학회 학술발표대회논문집 Vol.- No.-
This paper explains the fatigue test for a composite train carbody. The composite carbody with length of 23m was manufactured as a sandwich structure composed of a aluminium honeycomb core and woven fabric carbon/epoxy face. In order to evaluate fatigue strength of the composite carbody, the carbody was excited by two 50-ton capacity hydraulic actuators. The excitation frequency was determined by natural frequency evaluation test under full weight condition. The test was conducted for 2x106cycles. During the fatigue test, fatigue cracks of the composite carbody and steel underframe were inspected by the nondestructive tests using X-ray and liquid penetrant. From test tests, no fatigue crack was detected.