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전산화단층촬영상에서 하악후퇴수술 후 인두기도 공간의 변화
김방신,정승곤,한만승,정연욱,국민석,박홍주,오희균,유선열,Kim, Bang-Sin,Jung, Seung-Gon,Han, Man-Seung,Jeoung, Youn-Wook,Kook, Min-Suk,Park, Hong-Ju,Oh, Hee-Kyun,Ryu, Sun-Youl 대한악안면성형재건외과학회 2011 Maxillofacial Plastic Reconstructive Surgery Vol.33 No.1
Purpose: This study evaluated the pharyngeal airway space changes in CT images in patients receiving bilateral sagittal split osteotomy (BSSRO) for the surgical correction of mandibular prognathism. Methods: A total of 22 patients with mandibular prognathism were treated using BSSRO. Computed tomography was performed 1 month (T0) before surgery and, 1 month after surgery (T1). The anteroposterior length (AP), lateral width (LAT) and cross-sectional area (AREA) at the level of soft palate (C2) and base of the tongue (C3) were measured using CT images. Results: The mean amount of mandibular setback was 7.41 mm (${\pm}$3.46 mm). All the AP, LAT and AREA at the C2 and C3 level were decreased significantly 1 month after surgery (P<0.001). As the amount of mandibular setback was increased, the AP, LAT and AREA levels at the level of C2 and C3 had decreased. In addition, the reduction of the AREA at the C3 level was associated with the amount of mandibular setback (P<0.05). Conclusion: A significant decrease in pharyngeal airway space was observed 1 month after the operation. The cross-sectional area at the level of base of tongue was decreased with increasing amount of mandibular setback.
김방신(Bang-Sin Kim),허다니엘(Daniel Hur),김경락(Kyung-Rak Kim),양지웅(Ji-Woong Yang),정연욱(Younwook Jeoung),국민석(Min-Suk Kook),오희균(Hee-Kyun Oh),유선열(Sun-Youl Ryu),박홍주(Hong-Ju Park) 대한구강악안면외과학회 2010 대한구강악안면외과학회지 Vol.36 No.6
Introduction: This study examined the effect of a conservative neck dissection in patients with head and neck cancer. Materials and Methods: A total of 24 patients, who underwent a conservative neck dissection for the treatment of oral cancer from January 2002 to December 2007, were included. All procedures were performed by one oral and maxillofacial surgeon. The mean age was 58.2 years (range, 19 to 79 years). The medical recordings, pathologic findings, and radiographic findings were evaluated. The mean follow up period was 41.1 months (range, 4 to 88 months). Results: 1. Oral cancer was more common in men than women with a 3:1 ratio. 2. Histopathologically, squamous cell carcinoma(83%) was the most prevalent oral cancer in this study. 3. The most common primary site was the tongue(6 cases, 25%) followed by the mouth floor (5 cases, 21%), buccal mucosa (3 cases, 13%), lower lip, mandible, palate (2 cases, respectively) and salivary gland, retromolar area, oropharynx, alveolus (1 case, each). 4. Three out of the 24 (13%) subjects had a recurrence at the primary sites. 5. Two out of 24 (8%) subjects had a distant metastasis. 6. All 24 patients survived and there were eleven patients who passed 5 years postoperatively. Conclusion: A conservative neck dissection is a reliable and effective method for controlling neck node metastases in patients with oral cancer of the N0 or N1 neck node without serious complications.
생쥐 두개골에서 동종골 이식 시 면역억제에 대한 cyclosporine A의 효과
김방신(Bang-Sin Kim),박상묵(Sang Mook Park),김경락(Kyung-Rak Kim),정연욱(Younwook Jeoung),한만승(Man-Seung Han),국민석(Min-Suk Kook),박홍주(Hong-Ju Park),유선열(Sun-Youl Ryu),오희균(Hee-Kyun Oh) 대한구강악안면외과학회 2010 대한구강악안면외과학회지 Vol.36 No.5
Introduction: This study examined the effect of cyclosporine A (CsA) on the allogenic cranial bone graft in the mice. Materials and Methods:Twenty eight 12-week-old male ICR mice weighing 40 g were used. The experimental group was injected subcutaneously with CsA (10 mg/kg/day) diluted in Caster oil for 7 days prior to the graft until sacrifice. The control group was injected with the same solution without CsA. Two full-thickness bone defects with a diameter of 3 mm were made with a trephine bur in the parietal bone lateral to the sagittal suture. A calvarial defect of a mouse was grafted with allogenic calvarial bone disc from another mouse. The experimental and control groups were injected with CsA and the solution without CsA in the same manner before surgery, respectively. The mice were sacrificed at 1 week, 2 weeks and 4 weeks after the bone graft, respectively. Results: In the experimental group, fibrous connective tissues and small amounts of inflammatory cells were observed. At 2 weeks after the allograft in the experimental group, new bone formation in fibrous collagenous tissue and around the allogenic bone was noted. At 4 weeks after the allograft, new bone formation was active along and at the periphery of the mature allogenic bone. The proliferation of blood vessels increased in bone marrow. In the control group, fibrous tissues and inflammatory cells were observed around the allogenic bone and existing bone at 1 week. At 2 weeks after the allograft, the proliferation of blood vessels accompanied by inflammatory cells were scattered in the fibrous connective tissues. New bone formation around the allogenic and existing bone could be observed. At 4 weeks after the allograft, inflammatory cells were severely infiltrated around the allogenic bone. Osteoclasts were scattered along the allogenic bone and induced bone resorption. Conclusion: These results suggest that the daily administration of CsA (10 mg/kg/day) induces efficient immunosuppression without serious complications,and this protocol might be useful for the experimental model of allogenic bone grafts.
류승희(Seong-Hee Ryu),김방신(Bang-Sin Kim),정승곤(Seunggon Jung),한만승(Man-Seung Han),국민석(Min-Suk Kook),옥승호(Seung-Ho Ohk),오희균(Hee-Kyun Oh),박홍주(Hong-Ju Park) 대한구강악안면외과학회 2010 대한구강악안면외과학회지 Vol.36 No.5
Introduction: Bone resorption is a unique function of osteoclasts. Osteoclasts are a specialized macrophage polykaryon whose differentiation is regulated principally by macrophage colony-stimulating factors, receptor activator of nuclear factor κB ligand (RANK) ligand, osteoprotegerin (OPG), and interleukins (IL). Reflecting the integrin-mediated signals, osteoclasts develop a specialized cytoskeleton that allows it to establish an isolated micro-environment between itself and the bone, wherein matrix degradation occurs by a process involving proton transport. The levels of IL-1, IL-6, OPG, and prostaglandin E2 (PGE2) expression were evaluated to study the correlations between dental implant teeth and the adjacent teeth. Materials and Methods: The exudate of the gingival crevice acquired from dental implants, adjacent teeth, opposite teeth and contralateral teeth of 24 patients. Results: 1. The levels of IL-1, IL-6, OPG and PGE2 expression in dental implant teeth were higher than those of the contralateral teeth. 2. IL-1 revealed a higher expression level in the adjacent teeth than in dental implant teeth. 3. The dental implant teeth and adjacent teeth did not show a remarkable difference in the level of IL-1 expression. 4. All the other cytokines were strongly expressed in the dental implant compared to the adjacent teeth. Conclusion: These results suggest that there might be close correlation between dental implant teeth and adjacent teeth in terms of the expressions of cytokines that affect the development and regulation of osteoclasts.
RP titanium cap과 rhBMP-2를 이용하여 형성된 신생골의 미세전산화단층촬영을 이용한 평가
한만승(Man-Seung Han),정승곤(Seunggon Jung),김방신(Bang-Sin Kim),양지웅(Ji-Woong Yang),국민석(Min-Suk Kook),박홍주(Hong-Ju Park),유선열(Sun-Youl Ryu),오희균(Hee-Kyun Oh) 대한구강악안면외과학회 2010 대한구강악안면외과학회지 Vol.36 No.6
Introduction: This study examined the effect of recombinant human bone morphogenetic protein (rhBMP)-2 and β-tricalcium phosphate (β-TCP) on new bone formation in a rabbit calvarium using a rapid prototype titanium cap (RP Ti cap). Materials and Methods: Eight New Zealand white rabbits were used in this study. Hemispherical RP Ti caps (10 mm in diameter) were implanted subperiosteally on the rabbit calvaria. β-TCP was filled in the RP Ti cap in the control group, and rhBMP-2 soaked β-TCP was used in experimental group. The rabbits were sacrificed 2 and 4 weeks after the operation. The volume and pattern of newly formed bone was analyzed by micro computed tomography (CT). Results: Macroscopically, there were no abnormal findings in any of the animals. The micro CT images revealed new bone from the calvaria that expanded gradually toward the top of the titanium cap, particularly along the inner surface of the titanium cap in the experimental group at 4 weeks after grafting. There was no significant difference in new bone volume ratio between the control and experimental groups at 2 weeks after grafting. There was a statistically significant difference in the new bone volume ratio between the experimental (14.1±1.8 %) and control (7.2±1.5 %) groups at 4 weeks after grafting (P<0.01). Conclusion: The RP Ti cap can effectively guide new bone formation and rhBMP-2 can induce the new bone formation
골격성 3급 부정교합 환자에서 하악지시상분할골절단술 후 3D CT 영상을 이용한 하악과두 위치변화 분석
장정록(Jung-Rok Jang),최근호(Guen-Ho Choi),박영준(Young-Jun Park),김방신(Bang-Sin Kim),유민기(Min-Gi Yu),국민석(Min-Suk Kook),박홍주(Hong-Ju Park),유선열(Sun-Youl Ryu),오희균(Hee-Kyun Oh) 대한구강악안면외과학회 2009 대한구강악안면외과학회지 Vol.35 No.5
Purpose: This study was performed to evaluate three-dimensional positional change of the condyle using 3D CT after bilateral sagittal split ramus osteotomy (BSSRO) in skeletal class III patients. Patients and methods: Nine patients who underwent BSSRO for mandibular set-back in skeletal class III malocclusion without facial asymmetry were examined. Miniplates were used for the fixation after BSSRO. 3-D CT was taken before, immediately after, and 6 months after undergoing BSSRO. After creating 3D-CT images using V-works 4.0TM program, axial plane, coronal plane, & sagittal plane were configured. Three dimensional positional change, from each plane to the condyle, of the nine patients was measured before, immediately after, and 6 months after undergoing BSSRO. Results: 1. The mean value of mandibular set-back for nine mandibular prognathism patients was 7.36 mm (± 2.42 mm). 2. In the axial view, condyle is rotated inward immediately after BSSRO (p < 0.05), comparing with preoperative but outward 6 months after BSSRO comparing with postoperative (p < 0.05). 3. In the axial view, condyle is moved laterally immediately after BSSRO (p < 0.05), comparing with preoperative but regressed 6 months after BSSRO comparing with preoperative (p > 0.05). 4. In the frontal & coronal view, there is changed immediately after and 6 months after BSSRO, comparing with preoperative but no statistical difference. Conclusion: These results indicate that three-dimensional positional change of the condyle in skeletal class III patients is observed lateral displacement & inward rotation immediate after BSSRO, but the condyle in 6 months after BSSRO tends to regress to preoperative position.