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강경동,배용찬,남수봉,최수종,정도상,김창원,Kang, Kyung-Dong,Bae, Yong-Chan,Nam, Su-Bong,Choi, Soo-Jong,Jung, Do-Sang,Kim, Chang-Won 대한성형외과학회 2010 Archives of Plastic Surgery Vol.37 No.6
Purpose: It is difficult to provide accurate diagnosis and proper treatment for vascular anomalies, because vascular anomalies have a wide spectrum of lesion with various symptoms. Furthermore, vascular anomalies often require the services of a wide range of specialists. So, many patients have been discouraged by the lack of expertise and treatment options available to them. In this study, we aimed to describe the scope of the Vascular Malformation clinic (VAM clinic), a multidisciplinary clinic for hemangioma and vascular malformation patients and investigate of diagnostic accuracy of VAM clinic. Methods: 68 patients have included in a retrospective, medical record review study in the VAM clinic from may 2002 to august 2009. Data included the types of diagnoses of patients seen in the clinic, locations of lesions, comparison of accuracy of diagnoses at other clinic and initial diagnoses at VAM clinic and types of recommended treatments. Results: Initial diagnosis at VAM clinic showed 94.2% accuracy, while diagnosis at other clinic only showed 12.5% accuracy. Head and neck is most frequently occurred lesions in patients of VAM clinic. And VAM clinic is able to provide various and proper treatments to patients. Conclusion: Hemangiomas and vascular malformations can present with various medical problems. VAM clinic, the multidisciplinary clinic provided accurate diagnoses and proper treatments to patients.
건설실패지수를 이용한 핵심관리요인 분석에 관한 연구 : 공동주택사업을 중심으로
강경동,이로나,이학기 대한건축학회지회연합회 2012 대한건축학회연합논문집 Vol.14 No.4
건설산업은 타 산업에 비해 많은 불확실성을 가지고 있기 때문에, 첨단 관리 시스템의 도입에도 불구하고 많은 건설실패를 초래하고 있다. 건설실패는 건설 프로젝트의 기획, 설계, 시공, 유지관리 등 모든 단계에서 발생 가능성이 있다. 하지만 현재 건설실패는 실패사례에 대한 체계적인 분류가 이루어지지 않은 상태로 단순한 자료의 축적에 머무르는 수준이며, 신뢰 할 수 있는 규정도 부족하다. 건설실패에 대한 다수의 연구들이 진행되고 있지만, 시공단계에만 집중하여 연구가 이루어지고 있는 실정이다. 또한 건설실패가 정성적 지표로만 제공되어 관리자의 능력에 따라 예방대책의 효과가 좌우되고 있다. 따라서 체계적이고 효과적인 건설실패관리를 위해 프로젝트 각 사업단계에서 건설실패 요인이 고려되어져야 하고, 정량적인 평가가 이루어 져야한다. 본 연구는 기존 연구에서 제시한 건설실패지수(Construction Failure Index: CFI)를 이용해 프로젝트 각 사업단계의 핵심관리요인을 분석하여, 건설실패관리 시스템 구축을 위한 기초적 자료를 제시하고자 한다.
강경동,이재우,김경훈,오흥찬,최치원,최수종,배용찬,남수봉,김정일,추기석 대한성형외과학회 2011 Archives of Plastic Surgery Vol.38 No.1
Purpose: Anterolateral thigh(ALT) perforator free flap is commonly used because of its various benefits. The author reports important factors of preoperative and perioperative ALT perforator free flap and causes of failure. Methods: 84 patients that treated with ALT perforator free flap from December 2004 to 2008 & February 2010 to April 2010 were studied. 61 patients were male and 23 were female. The mean age of patients was 51.1. The main cause was neoplasm and the main reconstructive areas were head and neck area. The size of flap was various from 3 × 4 to 12 × 18 cm. 6 patients received split thickness skin graft at donor site. Preoperative angiography was checked to all patients. Results: Of the 84 patients, partial necrosis of flaps were occurred in 4 patients because of atherosclerosis, varicose vein, or inattention of patient, etc. And 5 patients experienced total flap necrosis because of abnormal vessels of recipient area or delay of operation, etc. One case of serous cyst was found as the complication of donor area. Two cases of skin graft on donor site were done because of suspected muscle compartment syndrome, 4 cases of that because of large flap. Septocutaneous perforators were found in 7 cases. The author couldn't find reliable perforator in 3 cases, ipsilateral anteromedial thigh perforator and contralateral ALT perforator and latissimus dorsi musculocutaneous free flap were done instead of ALT. There was no case which needed reoperation because of the impairment of blood supply, and 3 cases were revised by leech because of the burn injury by a lamp or venous congestion. Conclusion: Although ALT perforator free flap is widely used with its various merits, many factors such as preoperative condition of donor or recipient area, morphology of defect and operating time are considerable to prevent flap necrosis. And operators should be needed careful technique because septocutaneous perforator is uncommon, and musculocutaneous perforator is common but difficult to dissect.
파동형 Nd:YAG 레이저조사가 인체 치은조직에 미치는 영향
강경동,김천석,김형수,김현섭,김병옥,한경윤,Kang, Kyung-Dong,Kim, Chun-Suk,Kim, Hyung-Soo,Kim, Hyun-Seop,Kim, Byung-Ock,Han, Kyung-Yoon 대한치주과학회 1996 Journal of Periodontal & Implant Science Vol.26 No.4
The purpose of this study was to determine the effect of a pulsed Nd:YAG laser irradiation on human gingival tissues. The patients, who were planned to be treated by clinical crown lengthening procedure and gingivectomy, were selected. All the patients received oral hygiene instruction, scaling and root planing at preoperation. The crest of gingival tissue on upper and lower anterior teeth was irradiated by a pulsed Nd:YAG laser(El. EN. EN060, Italy) with a fiber optic of 300 m in contact mode for 20 seconds. Gingival tissues were divided into 4 groups according to the laser power of 1.0W(10Hz, 100mJ), 2.0W(20Hz, 100mJ), 3.0W(30Hz, 100mJ) and 4.0W(40Hz, 100mJ). Immediately after the laser irradiation, the specimens were excised, fixed 10% neutral formalin, sectioned $4-6{\mu}m$ thick, stained by Hematoxylin-Eosin and Periodic Acid Schiff stain and observed under light microscope. The removed tissue depth and the coagulated layer depth due to a laser irradiation by a laser irradiation were measured on the microphotographs. The difference of measurements according to the different laser power was statistical1y analyzed by Kruskal Wallis Test with SAS program. The results were as follows : 1. In histologic findings of irradiated gingival tissues; a. In the irradiated gingival specimen with 1.0W laser power, some vesicles were observed in limited superficial layer of gingival epithelium. b. In the irradiated gingival specimen with 2.0W and 3.0W laser power, the epithelium was almost removed except for the traces of viable basal cell remnants at ret peg, and coagulation necrosis related with the thermal effect of laser was noted. c. In the irradiated gingival specimen with 4.0W laser power, complete removal of epithelium, partial removal of underlying connective tissue, and the coagulation necrosis of subjacent gingival tissue were shown. 2. The removed tissue depth was deeper in the irradiated specimens with higher power. There was a statistical significance in the difference of removed tissue depth between 1.0W group ($44.54{\pm}6.99um$) and 3.0W group ($99.75{\pm}6.64{\mu}m$), and between 1.0W group($44.54{\pm}6.99{\mu}m$) and 4.0W group($111.36{\pm}4.50{\mu}m$), and between 2.0W group($98.01{\pm}4.53{\mu}m$) and 4.0W group($111.36{\pm}4.50{\mu}m$)(P<0.05). 3. The coagulated layer depth was deeper in the irradiated specimens with higher power. There was a statistical significance in the difference of coagulated layer depth between 1.0W group($31.82{\pm}8.99{\mu}m$) and 3.0W group($55.99{\pm}20.94{\mu}m$), and between 1.0W group($31.82{\pm}8.99{\mu}m$) and 4.0W group($83.68{\pm}10.34{\mu}m$)(P<0.05). From this study, the results demonstrated that the effects of a pulsed Nd:YAG laser irradiation on gingival tissues seemed to depend on the laser power and that the irradiation with high power could be harmful to adjacent healthy tissue.
성견에서 저강도파동형초음파가 초기고정이 없는 임플란트의 골융합에 미치는 효과
강경동 ( Kyung Dong Kang ),김소영 ( So Young Kim ),임성철 ( Sung Chul Lim ),김병옥 ( Byung Ock Kim ) 한국조직공학과 재생의학회 2010 조직공학과 재생의학 Vol.7 No.2
The aim of this study was to evaluate the effects of low intensity pulsed ultrasound (LIPUS) on the osseointegration of implants without initial stability in a canine model using a histologic, histomorphometric method (bone-implant contact, BIC) and a mobility test (PTVs). Six, male mongrel dogs (17-19 kg) were included in this study. Four months after extraction, a total of 36 implants were placed bilaterally into the lower mandible. Holes, 3.5 mm in diameter, were drilled into the mandibular bone, and implants with a resorbable blasting media surface, 3.3 mm in diameter and 8.5 mm in length, were placed into the holes. The implants placed into the holes were covered with resorbable membrane. The left side of each dog received LIPUS application (15 minutes/day for 7 days), while the right side as a control received no treatment. The output of LIPUS was 3.0 MHz and 240 mW/cm2. Two dogs were sacrificed at 2-, 4- and 8-weeks. PTVs showed statistically significant differences in both groups over healing periods. The histomorphometric analysis showed that the BIC % in both groups tended to be increased as the healing time passed. And at 4-weeks, new bone was formed and in direct contact with the implant surface. Mature bone was present after 8-weeks, irrespective of LIPUS treatment. This study suggested that LIPUS may have a positive effect on osseointegration and stability of dental implants, especially in early healing periods.