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제주특별자치도 10년, 지방세 세입성과와 과제에 대한 사례연구
채종우(Jong Woo Chae),정순여(Soon Yeo Jung) 제주대학교 관광과경영경제연구소 2016 産經論集 Vol.37 No.1
This study is mainly actively working practices for tax exemption and tax revenue raising to explore ways for sustainable growth of the local tax revenue from 2006 to 2015 were analyzed. This was mainly to present the local tax revenue environmental changes, thus local tax revenue and kidney due, the main cause analysis of revenues kidney, kidney revenue challenges for sustainable revenue raising measures, etc.
청소년 야구 선수에서 발생한 거골하 관절의 활액막 골연골종증
채종우 ( Jong Woo Chae ),조형래 ( Hyung Lae Cho ),오용승 ( Yong Seung Oh ),이완석 ( Wan Seok Lee ) 대한스포츠의학회 2018 대한스포츠의학회지 Vol.36 No.4
Synovial chondromatosis is an uncommon disorder characterized by cartilaginous proliferation within the synovial membrane of the articular joint. Smaller joints are rarely affected and it may be progressed to osteochondromatosis after ossification or calcification of metaplastic cartilage. It is commonly presented in the third to fourth decade of life, but rarely presented in adolescence. We report a unique case of synovial osteochondromatosis of the subtalar joint in 14-year-old baseball player. Arthroscopic removal of loose body and complete excision of the osteochondral mass with concomitant synovectomy resulted in satisfactory outcome without recurrence at final follow-up.
대퇴 전자간 병적 골절 불유합과 동반된 대퇴 골두 함몰에 대한 혈관 부착 비골 이식술
김형민(Hyoung Min Kim),조형래(Hyung Lae Cho),이재영(Jae Young Lee),채종우(Jong Woo Chae),신명지(Myung Ji Shin),김지언(Ji Un Kim) 대한정형외과학회 2018 대한정형외과학회지 Vol.53 No.2
고관절 주위 병적 골절은 골절의 내고정과 기존 종양 병소에 대한 수술이 병행되어야 하므로 치료가 쉽지 않다. 양성 또는 악성 종양으로 인해 대퇴 경부와 전자부에 광범위한 골 파괴가 동반된 경우 인공 관절 치환술이 필요하나 청소년이나 젊은 성인에서는 고관절 보존 술식이 우선적으로 고려되어야 한다. 저자들은 14세 여자 환자에서 기존 동맥류성 골낭종에 발생한 대퇴 전자간 병적 골절을 경험하였다. 수 차례의 내고정과 골 이식에도 불구하고 골절부의 유합이 이루어지지 않았으며 압박 고 나사 주위의 골용해로 인해 대퇴골두 무혈성 괴사와 유사한 대퇴 골두의 진행성 함몰 소견이 관찰되었다. 혈관 부착 비골 이식술을 이용하여 기존의 골낭종의 치료와 고관절 보존이 가능하였다. Surgery for pathologic hip fracture poses significant challenges regarding the fixation of fracture and management of the original tumor lesion. An extensive destruction of the femoral neck and intertrochanteric region by benign or malignant lesions complicated by a pathological fracture generally necessitates total hip arthroplasty; however, in adolescents and young adults, preservation of the hip is preferable. We present a 14-year-old female patient, who sustained a pathological intertrochanteric fracture through a pre-existing aneurysmal bone cyst. Several operative interventions with internal fixation and bone graft were unsuccessful, and combined nonunion and progression of osteolysis around the compression hip screw eventually caused femoral head collapse, mimicking osteonecrosis. Hip preservation and resolution of the original tumor were achieved by free vascularized fibular graft.
13Cr 마르텐사이트계 스테인리스강의 내식성에 미치는 Mo 첨가량 및 템퍼링 온도의 영향
안용식,박화순,채종우 대한금속재료학회(대한금속학회) 1999 대한금속·재료학회지 Vol.37 No.7
Martensitic Stainless Steel has high strength and hardness in comparison with other stainless steels. But the toughness and corrosion resistance is lower. So lots of researches have been done in order to improve these properties. In the previous study the alloying element of Mo resulted in increasing the toughness at tempered condition of the steel. It has been investigated in this work how the Mo addition and tempering condition influence on the various types of corrosion behavior of 13% Cr martensitic stainless steel. Corrosion resistance was hardly changed by the tempering up to temperature of 500℃, but decreased at 600℃ due to the formation of Cr carbide on the prior austenite boundary. However, the corrosion resistance increased again at 700℃, because Cr carbides were resolved and redistributed. Both general corrosion resistance and intergranular corrosion resistance of tempered steel are significantly improved with Mo content.
후방 강선 고정법을 이용한 환축추 후방유합술 19례 분석 : Analysis of 19 Cases
장한,김승기,박종범,채종우,이성재 대한척추외과학회 1997 대한척추외과학회지 Vol.4 No.2
Study design : Clinical and radiological outcomes of nineteen patients who underwent posterior atlantoaxial stabilization with wiring were reviewed. Objectives : To determine the efficacy of the procedure per se. Particular attentions were paid on the technical problems associated with and the relationship between the outcome and the rotatory motion. Summary of Literature Review : Some authors have reported posterior atlantoaxial fusion to some extent restricts the rotatory movement of the cervical spine despite of relatively high success rate. Materials and Methods : The patients included rheumatoid atlantoaxial instability(8), type 11 dens fracture(5), atlantoaxial rotatory fixation(3), traumatic atlantoaxial subluxation(2), and Os odontoideum(l ). Pre and post-operative radiographs including flexion/extension lateral views from all paitents were studied. From five patients, the residual and compensatory rotatory motion at atlantooccipital joint and other cervical segments were assessed using dynamic CT scans at which the patients underwent extreme right and left axial rotation of the head in the transverse plane. Results : Solid fusion was achieved in sixteen of nineteen patients (84.2%). Three cases of nonunion were observed : two from rheumatoid group and one from dens fracture group. Of sixteen patients, recurrent translation secondary to wire loosening was seen in four patients, of whom two were rheumatoid atlantoaxial instability. Wire breakage was found in one case which 19-gauge wire was used. The assessed values for the total range of axial rotation across the entire cervical spine(from CO-C l to C7-T1) were 36, 32, 56, 73, and 56 degrees in five patients who were evaluated postoperatively with dynamic CT scans at 6, 9, 36, 36, and 48 months respectively. Conclusions : The rotatory motion data along with clinical evaluation of patients revealed no significant limitation in daily activities despite of the absence of motion at the C1-2 joint. In rheumatoid atlantoaxial instability, the problems associated with wire loosening were apparent. Consequently, the greater technical precision and more rigid internal fixation such as transarticular screw fixation or external immobilization can be suggested.