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메타카올린과 시멘트 킬른 더스트를 사용한 경량골재콘크리트에 관한 실험적 연구
임진혁(Yim Jin-Hyuk),김상헌(Kim Sang-Heon),김세환(Kim Seh-Hwan),지석원(Ji Suk-Won),최수경(Choi Soo-Kyung),서치호(Seo Chee-Ho) 대한건축학회 2009 大韓建築學會論文集 : 構造系 Vol.25 No.10
In this study, we analyzed properties of lightweight aggregate concrete using Meta Kaolin(MK) and Cement Kiln Dust(CKD) by way of lightweight and strength promotion. A decision of basic mixing ratio is needed at the time of lightweight aggregate concrete production using MK and CKD. A decision of basic mixing ratio has been done based on the strength special quality test of mortar. It was changed MK 10, 20, 30%, CKD 5, 10, 15, 20% by the admixture of the cement. According to results, at the lightweight aggregate concrete using MK and CKD, it was confirmed that the slump and slump flow value were reduced recording the percentage of MK and CKD replacement would increase. Unit volume weight of lightweight aggregate concrete was decreased as increase of MK and CKD replacement due to the density of MK and CKD were lower than the one of cement. Compressive strength and tensile strength at batches that replaced MK with CKD appeared higher than batches that replaced only MK. And the optimum replacement rate that drew through experiment results was MK 10%, CKD 5~15%.
메카카올린과 시멘트 킬른 더스트를 사용한 3성분계 시멘트 모르타르의 역학적 특성에 관한 연구
임진혁(Yim Jin-Hyuk),사순헌(Sa Sun-Heon),김상헌(Kim Sang-Heon),지석원(Ji Suk-Won),서치호(Seo Chee-Ho) 대한건축학회 2008 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.28 No.1(구조계)
Replacement of cement by admixture which is one of the methods to improve concrete performance has contributed to improvement of concrete strength and durability. On this study, the mechanical properties of Ternary cement made from replacement of cement by various admixtures such as Blast Furnaced Slag, Fly Ash and CKD was compared by replacing cement by Silica fume and Meta kaolin fundamentally. Especially this study was focused on establishing mechanical properties of ternary cement made from replacement of cement by CKD what is collected dust from the Kiln manufacturing cement. CKD having high fineness and alkalinity that can accelerate pozzolan reaction was effective for improving strength of Meta kaolin more than any other admixtures.
하악 전치부 무치악부의 임플란트 식립 후 발생한 설하 부위의 출혈과 기도폐쇄
양승빈,장창수,장용욱,이우희,임진혁,김좌영,양병은,Yang, Seung-Bin,Jang, Chang-Su,Jang, Yong-Wook,Lee, Eui-Hee,Yim, Jin-Hyuk,Kim, Jwa-Young,Yang, Byoung-Eun 대한구강악안면외과학회 2009 대한구강악안면외과학회지 Vol.35 No.6
Because sublingual region is well-vascularized and sublingual artery is passed throughout this region, it should be careful not to perforate lingual cortex when placing dental implant on mandible. A 83-years-old male complained severe sublingual hematoma, hemorrhage and dyspnea came our outpatient department. He had received dental implant placement in the same day. He needed hemostasis and airway control. If soft tissue of sublingual region and the artery are injured, it may result in life-threatening excessive hemorrhage. In dental implant surgery, especially mandible, we should recognize the accurate shape of mandible and anatomy of sublingual region. It is important to stop anticoagulant agent before surgery. When a patient has airway obstruction, the operator should manage airway quickly.
오정환(Jung-Hwan Oh),임진혁(Jin-Hyuk Yim) 대한구강악안면외과학회 2007 대한구강악안면외과학회지 Vol.33 No.2
The Varicella zoster virus is responsible for two common infectious diseases: chicken pox(Varicella) and shingles(Herpes zoster). Chicken pox is the primary infection. After the initial infection, the virus remains dormant in sensory ganglia until reactivation may occur decades later. The subsequent reactivation is Herpes zoster. Herpes zoster of the trigeminal nerve distribution manifests as painful, vesicle eruptions of the skin and mucosa innervated by the affected nerve. Oral vesicles usually appear after the skin manifestrations. Reports of osteomyelitis of jaw after trigeminal herpes zoster are extremely rare. We report a case of osteomyelitis on mandible caused by herpes zoster infection which was treated by antiviral drug, curettage. At 1 year post-operatively, mandibular mucosa had healed without recurrent sign. But post-herpetic neuralgia is remained.
이창연,김주원,장창수,임진혁,양병은,김좌영,배현경,Lee, Chang-Youn,Kim, Ju-Won,Jang, Chang-Su,Yim, Jin-Hyuk,Yang, Byoung-Eun,Kim, Jwa-Young,Pai, Hyun-Kyung 대한악안면성형재건외과학회 2012 Maxillofacial Plastic Reconstructive Surgery Vol.34 No.3
Cemento-ossifying fibroma (COF) is a benign fibro-osseous tumor with fibrous tissue, abnormal cement and bone, or a combination of such elements. These are slow-growing lesions and are more frequent in women. Here, we report the case of a 28-year-old Korean woman. The patient having no underlying disease complained about facial swelling and asymmetry. A firm mass with impacted molars and teeth deviation on the right maxilla was observed. A computed tomography scan was taken and an incisional biopsy was performed. Following this, COF was diagnosed. Complete surgical removal of the lesion was carried out. A post-operative follow-up was conducted and 3 months later the patient reported no discomfort or any sign of recurrence in regards to the lesion. Differential diagnosis with fibrous dysplasia and the COF is important because of the treatment choice. We report a case of COF and offer a review of the literature on this article.
하악 상행지부에 발생한 치성각화낭의 시상 분할 골절단술을 이용한 치험례
송현우,류동목,김여갑,이백수,권용대,최병준,김영란,임진혁,이정교,Song, Hyun-Woo,Ryu, Dong-Mok,Kim, Yeo-Gab,Lee, Baek-Soo,Kwon, Young-Dae,Choi, Byung-Jun,Kim, Young-Ran,Yim, Jin-Hyuk,Lee, Jung-Gyo 대한악안면성형재건외과학회 2009 Maxillofacial Plastic Reconstructive Surgery Vol.31 No.5
Odontogenic keratocyst (OKC) is a epithelial developmental cyst which were first described by Phillipsen in 1956. The frequency of OKC has been reported to vary from 3% to 11% of odontogenic cysts. The most characteristic clinical aspect of OKC is the high frequency of recurrence. The mechanism of recurrence is thought to be related to residues of cyst epithelium and an intrinsic growth potential following excision. And since the lining of the OKC is thin and friable, removal of the cyst in one piece may sometimes be difficult. Complete removal of the cyst lining without leaving behind remnants attached to the soft tissue or bone is necessary to avoid recurrence. Therapeutic approaches vary in different studies from marsupialization and enucleation, which may be combined with adjuvant therapy such as cryotherapy or Carnoy's solution, to marginal or radical resection. The recurrent rate varies from approximately 20% to 62%. And OKC in the angle-ramus region of the mandible had a higher tendency to recur, because of the difficulty in accessing and removing OKC from the ramus. By employing a sagittal splitting of the mandible a good surgical access was provided and cyst could be removed completely. We present an illustrative case of a small, lobulated OKC that involved ramus on mandible, and a review of the contemporary literature.
하악 우각부 골절 시 2개의 miniplate를 이용한 관혈적 정복술에 대한 전향적 예비 임상연구
양승빈(Seung-Bin Yang),장창수(Chang-Su Jang),김주원(Ju-Won Kim),임진혁(Jin-Hyuk Yim),김좌영(Jwa-Young Kim),양병은(Byoung-Eun Yang) 대한구강악안면외과학회 2010 대한구강악안면외과학회지 Vol.36 No.4
Introduction: The placement of a single miniplate is not sufficient to achieve rigid fixation in mandibular angle fractures. It often causes difficulties in reducing the intermaxillary fixation (IMF) period. Consequently, the placement of 2 miniplates is preferable. The intraoral approach in an open reduction and internal fixation (ORIF) of a mandibular angle fracture with 2 miniplates is often challenging. Accordingly, an alternative of transbuccal approach is performed. However, this method leaves a scar on the face and can result in facial nerve injury. This clinical study suggests a protocol that can maintain rigid fixation without a transbuccal approach in mandibular angle fractures. Materials and Methods: The subjects were 7 patients who sustained fractures of the mandibular angle and treated at Department of Oral and maxillofacial surgery, Sacred Heart Hospital, Hallym University. ORIF under general anesthesia was done using the intraoral approach. One miniplate was inserted on external oblique ridge of the mandible, and the other was placed on lateral surface of the mandibular body with contra-angle drill and driver. A radiographic assessment and occlusal contact point examination was carried out before surgery, and 2, 4 and 6 weeks after surgery. Results: The mean operation time was 80 minutes. Regarding the occlusion state, the number of contact points increased after surgery. Paresthesia and infection were reported to be complications before surgery. Conclusion: The placement of 2 miniplates using contra-angle drill for ORIF of mandibular angle fractures allows early movement of the mandible without IMF. We propose this approach to reduce the patients’discomfort and simplify the surgical procedure.
대학병원 응급실로 내원한 치과 응급환자에 관한 임상적 연구
장창수(Chang-Su Jang),이창연(Chang-Yeon Lee),김주원(Ju-Won Kim),임진혁(Jin-Hyuk Yim),김좌영(Jwa-Young Kim),김영희(Young-Hee Kim),양병은(Byoung-Eun Yang) 대한구강악안면외과학회 2011 대한구강악안면외과학회지 Vol.37 No.6
Introduction: In today’s society, the rapid and appropriate care of the dental emergency patients is much more important. So, a retrospective study on the characteristics of emergency dental injuries and diseases will be very meaningful. Materials and Methods: This retrospective clinical study was carried by reviewing the radiographic films and emergency chart of 11,493 patients who had visited the emergency room of Hallym Sacred heart Hospital and were treated in the Department of Oral and Maxillofacial Surgery from January 2006 to December 2010. Results: The male to female ratio was 1.9:1. The highest monthly incidence was observed in May (10.4%) and June (8.9%) and the peak age distribution was the first decade (56.0%), followed by the second decade (16.0%). Trauma was the most common cause in dental emergency patients, followed in order by toothache, odontogenic infection, temporomandibular joint (TMJ) disorder and oral hemorrhage. Soft tissue injury was most prevalent in the trauma group, followed by tooth injury and facial bone fractures. In the tooth injury group, tooth fracture (56.7%) showed the highest incidence followed in order by tooth subluxation (18.2%), tooth concussion (16.9%), tooth avulsion (11.5%) and alveolar bone fractures (3.7%). In the facial bone fracture group, mandibular fractures (81.8%) showed the highest incidence followed in order by maxilla fractures (15.7%), nasal bone fractures (9.0%), zygomaticomaxillary complex fractures (5.4%), orbital bone fractures (2.5%). In mandibular bone fractures, the most common location was the symphysis (70.1%), followed in order by the mandibular angle (33.0%), mandibular condyle (22.8%) and mandibular body (13.6%). In the infection group, a submandibular space abscess (46.2%) was most common followed in order by a buccal space abscess (17.4%), canine space abscess (16.9%) and submental space abscess (12.3%). TMJ dislocation (89.3%) showed the highest incidence in the TMJ disorder group, followed by TMJ derangement (10.7%). In the other group, a range of specific symptoms due to post operation complications, trigeminal neuralgia, chemical burns and foreign body aspiration were reported. Conclusion: For the rapid and appropriate care of the dental emergency patients, well-organized system should be presented in oral and maxillofacial surgery. And it is possible under analysis of pattern and the variation of the dental emergency patients.