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김수영,이수향,황은아,최현곤,김순흠,신동혁,엄기일,Kim, Soo-Young,Lee, Soo-Hyang,Hwang, Eun-A,Choi, Hyun-Gon,Kim, Soon-Heum,Shin, Dong-Hyeok,Uhm, Ki-Il 대한성형외과학회 2010 Archives of Plastic Surgery Vol.37 No.3
Purpose: Most surgeons have used autogenous cartilage for columella strut graft. But the supply of autogenous cartilage is often limited. So, this study is to investigate the usefulness of biodegradable plate as columella strut material. Methods: We studied 19 patients who have secondary cleft nasal deformity. Patients were divided into two groups. Group A patients who were not closed their growth plate underwent columella strut graft only with biodegradable plate through endonasal approach. The biodegradable plate was inserted between nasal tip and anterior nasal spine. Group B patients were closed their growth plate. They had an operation for columella strut graft with biodegradable plate fixed with autogenous conchal cartilage. If nasal tip projection was insufficient, we performed additionally onlay graft on nasal tip with autogenous soft tissue or remnant cartilage. Results: As a result of mean 14 months follow-up, we achieved a good nasal tip projection, narrowing of interalar distance and symmetrical nostril shape. No specific complications were reported except 2 cases, which were the extrusion of biodegradable plate into the nasal cavity and Staphylococcus aureus infection. Conclusion: The columella strut graft using biodegradable plate is simple and effective method. Biodegradable plate can be a good substitute for columella strut in patients who can not use autogenous cartilages.
10년 이상 장기 추적된 두개골 외판을 이용한 비첨성형술 환자의 골이식편의 운명
김덕중,이수향,황은아,최현곤,김순흠,신동혁,엄기일,Kim, Deok-Jung,Lee, Soo-Hyang,Hwang, Eun-A,Choi, Hyun-Gon,Kim, Soon-Heum,Shin, Dong-Hyeok,Uhm, Ki-Il 대한성형외과학회 2010 Archives of Plastic Surgery Vol.37 No.5
Purpose: In order to maintain corrected nasal tip projection, strong support is important. Authors used calvarial bone graft method for this purpose. Patients were followed up about permanency of the bone graft for a long time. Methods: From 1995 to 1998, author performed calvarial bone graft on 30 adult patients with secondary cleft lip and nose deformity. Patients were observed for 34 months. There were no specific complications, and results were satisfactory. We could confirm the permanence of the calvarial bone graft in 3 patients by photography and radiologic studies for 10 years follow-up. Results: None of the patients showed size change or displacement. But the portion of graft facing the tip was absorbed resulting in loss of tip projection and short nose in two patients. One patient had fracture on the middle of the graft. This caused depression from lower portion of the dorsum to the tip. Conclusion: Despite of autogenous grafts such as calvarial bone, absorption of the bone may occur when compressed with tension for a long period. And the graft in the nasal tip not having any contact with the nasal bone may cause absorption of the graft.
신동혁,김덕중,김수영,황은아,최현곤,김순흠,엄기일,Shin, Dong-Hyeok,Kim, Deok-Jung,Kim, Soo-Young,Hwang, Eun-A,Choi, Hyun-Gon,Kim, Soon-Heum,Uhm, Ki-Il 대한성형외과학회 2010 Archives of Plastic Surgery Vol.37 No.5
Purpose: Absorbable plate and screw fixation is widely used technique for internal rigid fixation in craniomaxillofacial surgery. However, there are some potential problems associated with the use of plate. The purpose of this study is to evaluate the feasibility of bone fixation in facial fracture using absorbable mesh in place of absorbable plate. Methods: The records of 55 patients with zygomaticomaxilla fractures treated by open reduction, performed by the author from February 2008 to May 2009, were retrospectively reviewed. Patients were selected to receive absorbable mesh fixation. The incidence of all complications including infection, hypoesthesia, and deformity was examined. Analysis with postoperative computed tomography follow-up demonstrates degree of reduction. Results: Forty-six patients met criteria for inclusion in the study. All patients went on to satisfactory healing without complication. Postoperative computed tomography revealed good bony alignment similarly non affected side. Conclusion: This study demonstrates that the rigid internal fixation of fractured bone fragments using absorbable mesh is more effective than absorbable plate, especially in comminuted fracture of maxilla.
이종접합 (HIT) 태양전지용 TCO 로 응용 가능한 BZO (ZnO:B) 박막 연구
유하진(Yoo Ha-Jin),유진혁(Yoo Jin-Hyuk),강민성(Kang Min-Sung),최현곤(Choi Hyun-Gon),손찬희(Son Chan-Hee),강정욱(Kang Jung-Wook),홍진(Hong-Jin),최은하(Choi Eun-Ha),조광섭(Cho Guang-Sup),권기청(Kwon Gi-Chung) 한국태양에너지학회 2010 한국태양에너지학회 학술대회논문집 Vol.2010 No.11
BZO (ZnO:B) thin films were grown by low pressure metal-organic chemical vapor deposition (LP-MOCVD) using diethylzinc (DEZ), and H2O as reactant gases and diborane (B2H6) as an n-type dopant gas. Boron and hydrogen were used as a co-dopant and post treatment using hydrogen plasma was performed in oder to boost the effect of co-doping. The structural and electrical of BZO thin films at different H₂ O/DEZ ratio were investigated. At the optimized conditions, low resistivity (1.69?10-3 Ω㎝) and sheet resistance (58 Ω/□) were obtained for the thickness of ~300 ㎚ BZO thin films deposited on glass substrate at the temperature of 453 K and processing pressure of 0.5 Torr. With the application of BZO thin films as transparent conductive oxide (TCO) in hetero-junction intrinsic thin layer (HIT) solar cell, the conversion efficiency was comparable to or higher than the commercialized ITO thin films.