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프랙탈 분석을 이용한 낭종 적출술 후 결손부 치유 양상에 관한 연구
임헌준(Hun-Jun Lim),이승수(Seung-Soo Lee),김원기(Won-Ki Kim),온병훈(Byung-Hun Ohn),최상문(Sang-Moon Choi),오세리(Se-Ri Oh),민승기(Seung-Ki Min),이 준(Jun Lee) 대한구강악안면외과학회 2011 대한구강악안면외과학회지 Vol.37 No.6
Introduction: Bone regeneration of cystic defects of the jaws after a cyst treatment requires lengthy healing periods. Generally, the bony changes are observed periodically through a visual radiographic reading as well as by the clinical opinion and radiographic images (panorama, periapical view), but it is difficult to compare the objective bony changes using only the radiographic density. In addition, it is difficult to observe minute bony changes through a visual radiographic reading, which can lead to a subjective judgment. This study exmined the bone density after the enucleation of a jaw cyst by fractal analysis. Materials and Methods: Eighteen patients with a cystic lesion on the jaw were assessed. Panoramic radiographs were taken preoperatively, immediately postoperatively, and 1, 3, 6 and 12 months after cyst enucleation. The images were analyzed by fractal analysis. Results: The mean fractal dimensions increased immediately after surgery and 3, 6 and 12 months postoperatively. The postoperative 6 and 12 months fractal dimension was similar to the controls. Conclusion: Fractal analysis was used to overcome the limit of a subjective reading during an assessment of bone regeneration after cyst enucleation.
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하악 제3대구치의 위치와 각도가 발치 후 합병증에 미치는 영향
홍선표(Sun-Pyo Hong),임헌준(Hun-Jun Lim),김원기(Won-Ki Kim),김용운(Yong-Woon Kim),오세리(Se-Ri Oh),이 준(Jun Lee),민승기(Seung-Ki Min) 대한구강악안면외과학회 2011 대한구강악안면외과학회지 Vol.37 No.5
Introduction: Mandibular third molar extraction is one of the most common procedures performed in oral and maxillofacial surgery units. Although the overall complication rate is low with most complications being minor, mandibular third molar removal is so common that the population morbidity of complications might be significant 1,2 . Therefore, efforts to limit intraoperative or postoperative complications might have a significant impact in terms of enhancing the patient outcome. The aims of this study were to identify the position and angulation associated complications after mandibular third molar extractions. Materials and Methods: This study surveyed 568 patients who had a mandibular third molar extracted, showed clinical complications and underwent a radiographic measurement of the available space, depth and spatial relationship. Results: The results obtained were as follows: 1. The complications were a dry socket, nerve injury, root rest, infection, bleeding, hamatoma, and adjacent teeth injury. 2. There were no significant differences between the complication and ramus relationship (available space) of the mandibular third molar. 3. There were no significant differences between the complications and depth of the mandibular third molar. 4. There were no significant differences between the complications and spatial relationship of the mandibular third molar. Conclusion: There were no significant differences in the complication rate, ramus relationship, depth and spatial relationship of the mandibular third molar. This suggests that the position and angulation of the mandibular third molar may not have an impact on the complications. The relationship between the position and angulation of the mandibular third molar, and complications deserves a further study using longitudinal data.
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김 기 대,이 승 준 대구대학교 산업기술연구소 2012 産業技術硏究 Vol.23 No.1
This study presents optimization techniques, without using Frame Bridge practical ways to optimize the objective function while satisfying the constraints given in such a way as to minimize the present study wall height 8.0m, span 8.0m - 20.0m, Rise / Span non-0.00% beam element to convert to 30%, comparing the arches and the horizontal structure, was investigated and the following conclusions were obtained. The results of this study obtained similar findings and conclusions by the optimization techniques of the past, and you can see that the reliability of this study, practical optimization, with less effort, to get the optimal solution in an efficient way is judged. To see the results of the cost comparison to a given design condition is 30% Rise / Span Non-if Rise / Span non-zero when compared to the construction cost is reduced by about 15%, appeared to be the excellence of the arch structure was unknown. Rise / Span Frame Bridge of the beam element in rain is 0, the maximum bending moment occurs at the center of the span, and the maximum cost, but Rise / Span ratio of about 30% when the minimum span the center almost to the minimum reinforcement ratio cross-section is determined by costas optimal, so you can shape.
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