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남정훈,노경록,유우근,이병민,전지현,박수현,안장훈,김정희,Nam, Jeong-Hun,Noh, Kyung-Lok,Yoo, Woo-Geun,Lee, Byeong-Min,Jeon, Ji-Hyeon,Park, Su-Hyun,Ahn, Jang-Hoon,Kim, Jung-Hee Korean Association of Maxillofacial Plastic and Re 2011 Maxillofacial Plastic Reconstructive Surgery Vol.33 No.1
The goal of this treatment is the surgical-orthodontic eruption of impacted permanent teeth associated with a large dentigerous cyst in a preadolescent patient. Although enucleation of the entire cyst and the extraction of impacted teeth are common treatments, missing permanent teeth cause several problems in young patients. In this report, an 11-year-old female visited with the chief complaint of a large radiolucent lesion from the mandibular anterior area to the left mandibular posterior area. The permanent left canine and premolars were displaced toward the mandibular inferior border area. The extraction of infected deciduous teeth and marsupialization were performed. After 4 months, orthodontic buttons for forced eruption were applied to the impacted permanent teeth. The teeth emerged into the oral cavity 3 months after the orthodontic treatment. Although the root form was abnormal, there were no other pathogenic signs. The alveolar bone had a normal trabecular pattern and the teeth appeared to be well maintained at postoperative 24 months.
Botryoid Odontogenic Cyst on Mandibular Anterior and Both Body Area: a Case Report
남정훈,김다영,박영주,안장훈,강태인,박미희,유우근,김보균,이정원,김정희,Nam, Jeong-Hun,Kim, Da-Young,Park, Young-Ju,Ahn, Jang-Hoon,Gang, Tae-In,Park, Mi-Hee,Yu, Woo-Geun,Kim, Bo-Gyun,Lee, Jung-Won,Kim, Jung-Hee Korean Association of Maxillofacial Plastic and Re 2010 Maxillofacial Plastic Reconstructive Surgery Vol.32 No.4
Botryoid odontogenic cyst (BOC) is considered a rare multilocular variant of the lateral periodontal cyst. In this report, a 67-year-old male visited with chief complaint of severe mobility on mandibular incisors. Multilocular radiolucent lesion was seen from the right premolar to the left premolar area, involving almost the whole mandible. Histologically, the botryoid odontogenic cyst showed focal nodular thickening of the lining epithelium. These thickening often showed swirling appearance of the cells. Cyst enucleation and bone graft on mandible anterior and both body area were performed under general anesthesia, and postoperative healing was favorable without recurrence.
남정훈(Jeong-Hun Nam),김종구(Chong-Koo Kim),오용철(Yoon-Chul Oh) 한국정보과학회 2002 한국정보과학회 학술발표논문집 Vol.29 No.2Ⅰ
소규모 업체를 모델로 비효율적인 업무의 문제점을 분석하여 이를 설계하고 구현하였다. 전체 기능은 기초정보관리, 판매관리, 재고관리, 고객관리로 구성하였다. 특정 소규모 점포의 업무를 전산 시스템화 하는 것이 목표이다. 그러나 구현된 시스템은 규모가 큰 완벽한 ERP가 아닌 직원 1 인인 업체의 특별한 업무시스템으로 구현되어 진다. 시스템의 구성은 확인된 사용자에 대하여 각종 데이터를 입력하고 각종 전표 및 현황을 출력하는 형태로 구성되어진다. 본 시스템은 어느 한 회사의 국한되지 않은 패키지형태의 시스템이다.
남정훈(Jeong Hun Nam),박종철(Jong Chul Park),유상배(Sang Bae Yu),정용일(Yong Il Chung),태기융(Gi Yoong Tae),김정주(Jung Ju Kim),박용두(Yong Doo Park),장정원(Jeong Won Jahng),이종호(Jong Ho Lee) 대한구강악안면외과학회 2009 대한구강악안면외과학회지 Vol.35 No.3
As an efficient controlled release system for rhBMP-2, a functional nanoparticle-hydrogel complex, incorporated with matrix metalloproteinase(MMP) sensitive peptide cross-linker, was developed and used as a bone transplant. In vivo bone formation was evaluated by soft x-ray, histology, alkaline phosphatase(ALP) activity and mineral contents analysis, based on the rat calvarial critical size defect(8mm in diameter) model. Significantly, effective bone regeneration was achieved with the rhBMP-2 loaded MMP sensitive hyaluronic acid(HA) based hydrogel-Nanoparticles(NP) complex, as compared to only MMP HA, the MMP HA-NP without rhBMP-2, or even with the rhBMP-2. These improvements included the formation pattern of bone and functional marrow, the degree of calcium quantification, and the ALP activity. These results indicate that the MMP sensitive HA with nano-particle complex can be a promising candidate for a new bone defect replacement matrix, and an enhanced rhBMP-2 scaffold.
백서 두개골결손모델에서 실크단백과 골형성단백 이식체가 골재생에 미치는 영향
남정훈(Jeong-Hun Nam),노경록(Kyung-Lok Noh),방은오(Eun-O Pang),유우근(Woo-Geun Yu),강응선(Eung-Sun Kang),권해용(Hae-Yong Kweon),김성곤(Seong-Gon Kim),박영주(Young-Ju Park) 대한구강악안면외과학회 2010 대한구강악안면외과학회지 Vol.36 No.5
Introduction: This study evaluated the capability of silk fibroin (SF) and recombinant human bone morphogenetic protein-2 loaded SF (SF-BMP) as a bone defect replacement matrix when grafted in a calvarial bone defect of rats in vivo. Materials and Methods: A total 70 calvarial critical size defects (5.0 mm in diameter) made on 35 adult female Sprague-Dawley rats were used in this study. The defects were transplanted with (1) rhBMP-2 loaded silk fibroin graft (SF-BMP: 0.8+10 μg), (2) Silk fibroin (SF: 10 μg), and (3) no graft material (Raw). The samples were evaluated with soft x-rays, alkaline phosphatase activity, calcium/phosphate quantification, histological and histomorphometric analysis at postoperative 4 and 8 weeks. Results: The SF-BMP group (48.86±14.92%) had a significantly higher mean percentage bone area than the SF group (24.96±11.01%) at postoperative 4 weeks.(P<0.05) In addition, the SF-BMP group (40.01±12.43%) had a higher % bone area at postoperative 8 weeks than the SF group(33.26±5.15%). The mean ratio of gray scale levels to the host bone showed that the SF-BMP group (0.67±0.08) had a higher mean ratio level than the SF group (0.61±0.09) at postoperative 8 weeks. These differences were not statistically significant.(P=0.168 and P=0.243, respectively) The ratio of the calcium and phosphate contents of the SF-BMP (0.93±0.22) group was lower than that of the SF (1.90±1.42) group at postoperative 4 weeks. However, the SF-BMP group (0.75±0.31) had a higher Ca/PO4 ratio than the SF (0.68±0.04) at postoperative 8 weeks. These differences were not statistically significant.(P=0.126 and P=0.627, respectively) For the bone-specific alkaline phosphatase (ALP) activity, which is recognized as a reliable indicator of the osteoblast function, the SF-BMP (23.71±8.60 U/L) groups had a significantly higher value than the SF group (12.65± 6.47 U/L) at postoperative 4 weeks.(P<0.05) At postoperative 8 weeks, the SF-BMP (21.65±10.02 U/L) group had a lower bone-specific ALP activity than the SF group (16.72±7.35 U/L). This difference was not statistically significant.(P=0.263) For the histological evaluation, the SF-BMP group revealed less inflammation, lower foreign body reactions and higher bone healing than the SF group at postoperative 4 and 8 weeks. The SF group revealed more foreign body reactions at postoperative 4 weeks. However, this immunogenic reaction decreased and the remnant of grafted material was observed at postoperative 8 weeks. For histomorphometric analysis, the SF-BMP group had a significantly longer bone length to total length ratio than those of the SF group at postoperative 4 and 8 weeks.(P<0.05) Conclusion: The rhBMP-2 loaded silk fibroin graft revealed fewer immunoreactions and inflammation as well as more new bone formation than the pure silk fibroin graft. Therefore, silk fibroin may be a candidate scaffold for tissue engineered bone regeneration.
Multi-Level Fast Multipole Method와 반복적 물리 광학법을 이용한 대규모 복합 임피던스 및 유전체 매질 전자기 산란 해석
남정훈(Jeong-Hun Nam),유정운(Jeong-Un You),고일석(Il-Suek Koh) 한국전자파학회 2021 한국전자파학회논문지 Vol.32 No.10
임피던스 매질과 유전체로 구성된 대규모 복합 매질의 전자기 산란 해석을 위한 MoM 행렬 방정식 어셈블리방법을 제안한다. 이산화된 산란체 표면의 삼각형 메쉬(mesh)마다 매질 정보를 할당하며, 이를 기반으로 복합 매질 산란체 표면간의 상호작용을 계산한다. 하나의 edge에 할당된 삼각형의 개수가 2개 이상인 경우 half-RWG 기저함수를 할당하여 Z행렬 요소를 계산한다. IPO는 매질에 따라 적절한 반사계수를 고려하여 산란체 표면 위에서 지역적 평면 근사화를 통해 해석한다. 제안한 MoM과 IPO를 상용 툴인 FEKO, CST와 비교함으로써 수치적인 정확도를 검증한다. We propose a method of moments (MoM) matrix assembly method for electromagnetic scattering analysis of large-scale complex materials composed of impedance and dielectric media. Material information is assigned to each triangular mesh of the discretized surface, and the interaction among the meshes is calculated. If several meshes are assigned to one edge, the half-Rao-Wilton-Glisson (RWG) basis function is used to calculate the Z matrix elements. Iterative physical optics (IPO) analysis is performed based on the local tangential approximation for the scatterer surface and the appropriate reflection coefficient of each mesh. The numerical accuracy is verified by comparing the proposed MoM and IPO results with those of the commercial tools FEKO and CST Studio Suite.
하악 후구치 삼각부에 발생한 후천성면역결핍증 관련 카포시육종: 증례보고
박영주,남정훈,노경록,방은오,김다영,김준현,정재안,신진업,강응선,Nam, Jeong-Hun,Park, Young-Ju,Noh, Kyung-Lok,Pang, Eun-O,Kim, Da-Young,Kim, Jun-Hyun,Chung, Jae-An,Shin, Jin-Eob,Kang, Eung-Seon 대한구강악안면외과학회 2009 대한구강악안면외과학회지 Vol.35 No.3
There are several oral lesions related with AIDS, such as candidiasis, hairy leukoplakia, Kaposi's sarcoma, aphthous stomatitis, lichen planus, and other opportunistic infectious diseases. Among the others, Kaposi's sarcoma, the most common malignant tumor associated with AIDS, is closely linked to the number of CD4+ T cell. Kaposi's sarcoma often occurs in palate, the most prone site, and has characteristic clinical features in most cases. Sometimes, the tumor induces underlying bone destruction at late stage. We report a case of a 27 year-old man with AIDS-associated Kaposi's sarcoma at left lower retromolar triangle, parapharyngeal area and discuss the management of AIDS patients in dentistry.
위축된 치조골에서 치조골 수평 확장술을 이용한 임플란트 이식술에 관한 임상연구
박영주,남정훈,송준호,연병무,노경록,방은오,정재안,신진업,강응선,Park, Young-Ju,Nam, Jeong-Hun,Song, Jun-Ho,Yeon, Byung-Moo,Noh, Kyung-Lok,Pang, Eun-O,Chung, Jae-An,Shin, Jin-Eob,Kang, Eung-Seon 대한악안면성형재건외과학회 2009 Maxillofacial Plastic Reconstructive Surgery Vol.31 No.4
The aim of this study was to evaluate the clinical applicability of a ridge splitting technique for reconstruction of narrowed edentulous alveolar ridges for dental implantation. 41 patients with 47 edentulous areas were included in this study. After corticotomy of a rectangular buccal segment and about 3-4 weeks healing period, the alveolar ridge was splitted, implant was placed. The initial ridge width varied between 2.5 and 7.0mm, average was 3.99mm. 68 dental implants were placed, and the gap between the implants and the bone is filled with various bone graft material, or none. All splitted sites showed sufficient bone volume for insertion of the implants at the moment of implantation. Over 1 year of follow-up period, five implants(7.3%) had mobility in two patients, among them, 2 implants(2.9%) sustained infection and removed. And any other complications were not noted. Our conclussion is that ridge splitting of the narrow edentulous area is a reliable and safe procedure in horizontally deficient ridges.