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악관절 후방부착부에 있어서 MRI 신호변화에 대한 고찰
정주성,허원실,정훈,Jung, Joo-Sung,Huh, Won-Shil,Chung, Hoon 대한악안면성형재건외과학회 1997 Maxillofacial Plastic Reconstructive Surgery Vol.19 No.1
Magnetic resonance imaging has been used in the temporomandibular joint(TMJ) primarily to define morphology and positional relationship of associating structures. This report examines signal intensity characteristics of the posterior attachment as they related to the severity of internal derangement. Fifty six joints in 35 patients with a history of TMJ dysfunction were imaged writ MR using $T_1$-weighted spin echo sequence. According to disk position, ability to reduction, and the presence of osteoarthritis, the joints were categorized into three groups. A group 1 was anterior disk displacement with reduction; a group 2 was anterior disk displacement without reduction; a group 3 was anterior disk displacement without reduction and condyle had osteoarthritic change. The control group was determined by the clinical absence of any signs or symptoms of current or past TMJ pain and dysfunction. Calculated the relative value of MR signal intensity in posterior attachment and disk to cerebral cortex of temporal lobe by means of computer program, we have compared them with each groups. The result showed statistically little significant difference of disk signal intensity among each groups. but, signal intensity from posterior attachment in group 2 and 3 were significantly(p<0.05) decreased than control group. this might reflect an fibrosis or hyalinization of posterior attachment, which was part of remodeling process that occurs in disk displacement without reduction. However, this study could not demonstrate histologic confirmation of the decreased signal intensity in the posterior attachment. So, further investigation could be needed to understand the association between them.
신동석(Dong Seok Shin),정병용(Byung Yong Jeong),정주성(Joo Sung Jung),박명환(Myoung Hwan Park) 대한인간공학회 2019 大韓人間工學會誌 Vol.38 No.5
Objective: This research aims to analyze the occupational deaths and violation of the Korean taxi drivers and to find out the effect of factors for recommendations on injury prevention. Background: Although there are many studies on traffic accidents, there are few studies on taxis, which are the main means of transportation. Moreover, There is little research on the industrial accidents of taxi drivers. Method: The data of 586 taxi drivers approved as industrial accidents compensation of years 2015 and 2016 were analyzed. Significant variables explaining deaths and violation were identified by binary logistic regression. Results: Drivers aged 65 or older are more likely to die from accidents than those under 65 (OR (odds ratio): 1.85, p =0.048). In addition, violations were more likely to lead to death than no-violation (OR: 1.94, p =0.046). Facial injuries were more likely to lead to death (OR: 2.38, p =0.003) and encephalorrhagia injuries were more likely to lead to death (OR: 3.82, p <0.001). Conclusion: In order to prevent accidents of the elderly drivers, it is necessary to reinforce safety education and to manage the driving license renewal cycles according to the ages. In addition, a system for integrated management of taxi transportation should be established to improve the working environment of older taxi drivers. Systematic approach is necessary to alert taxi drivers to the fatal consequences of traffic violations and to make them to comply with the traffic rules. Application: The effects of the significant variables on deaths and violations can be used as a guideline to develop systematic measures for prevention of accidents for the taxi drivers.
Calcium Sulfate와 생체활성유리 45S5 복합이식 및 Calcium Sulfate 차폐막의 골재생 효과
정주성,유선열 전남대학교 치의학연구소 2001 구강과학 Vol.13 No.4
The purpose of the present study was to investigate the effect of the composite grafts of calcium sulfate and bioactive glass 45S5 in combination with calcium sulfate barrier in the experimental bone defects. Twenty rabbits, weighing about 2.5kg, were used. Three artificial bone defects, 5×5×5㎣ in size, were made at the mandibular angle area. In the experimental group 1, the bone defect was filled with bioactive glass 45S5 and calcium sulfate; in the experimental group 2, the bone defect was filled with the composite graft of bioactive glass 45S5 and calcium sulfate and covered with calcium sulfate membrane barrier. In the control group, the bone defect was filled with blood and was spontaneously healed. The rabbits were sacrified at 1, 2, 4, 6 and 8 weeks after the operation. Microscopic examination was performed. The results obtained were as follows; In the experimental group 1, prominent new bone formation was observed in compared with the control group. In the experimental group 2, extensive osseous regeneration was demonstrated in compared with the experimental group 1. The bioactive glass 45S5 were minutely cracked at week 2, and connective tissues were migrated into inner portion of the glass particles through the crack at week 4. As a consequence, each glass particles may function as a nucleation-site for new bone formation. As the experimental time elapsed, the amount of new bone formation was increased in the two experimental groups in compared with the control group. These results suggest that the composite graft of bioactive glass 45S5 and calcium sulfate promote new bone formation, and the composite graft in combination with calcium sulfate barrier is considered as a potential method for osseous regeneration.
이승호,정종철,김건중,정주성,유선열,박문성,김창룡 大韓顎顔面成形再建外科學會 1996 Maxillofacial Plastic Reconstructive Surgery Vol.18 No.4
Odontogenic infections are usually locally confined, self-limiting processes. However, under certain circumstances, they may break through the bony, muscular, and mucosal barriers and spread into contiguous fascial spaces or planes far from the initial site of involvement, resulting in severn life-threatening complications, such as retropharyngeal spread, suppurative mediastinal extension, airway obstruction, pleuropulmonary suppuration, and hematogenous dissemination to distant organs. The mortality arte for mediastinitis from odontogenic infection ranges from 40% to 60%. Therefore rapid evalution and treatment is essential with a combination of life support, antibiotic therapy, and surgical intervention. Recently, we experienced three cases of retropharyngeal and mediastinal abscesses secondary to odonogenic infections. In all patients, early diagnosis was possible by CT scanning and physical examination. The prognosis was good in all patients by using urgent aggressive surgical and antibiotic therapy.