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상악 측절치의 선천적 결손시 교정치료 : Case Report
지대경,임용규,이동렬 고려대학교 임프란트 연구소 2000 임프란트연구지 Vol.2 No.1
Congenital abscence of one or both of the maxillary incisors is the second most common form of tooth agenesis. Whether congenitally abscent or lost as the result of an accident or pathologic condition, missing lateral incisors present a problem, which complicates orthodontic treatment. The condition requires careful treatment planning and a consideration of the options and outcomes following either space closure or prosthetic replacement. This study presents the clinical cases with maxillary lateral incisors missing, following optimal diagnosis and treatment planning considerations in treatment in these cases.
치과임프란트 계면에 대한 전자현미경적 연구 : 제거된 IMZ 임프란트 Retrived IMZ Dental Implant
徐奎源,保坂光雄,安容淳 고려대학교 임프란트 연구소 1999 임프란트연구지 Vol.1 No.1
One of the main research in dental implant science is the histological explanation of the establishment of an interface between tissue and implant materiols. The primary function of a bone-implant interface is to provide safe and effective load transfer from dental implant to Jaw bone, and loosening of this interfacial fixation is the leading cause of dental implant failure. The purpose of this study was to get clinical and histopathological informations of failed IMZ implant removed from the 60 years old male patient at 3 years after implantation. Implant and peri-implant tissue on upper right central incisor area were removed because of radiolucency and mobility. Immediately fixed in phosphate-buffered(PH7.4) 2.5% glutaraldehyde. The specimens were prepared with H-I stain for LM. And for TEM, after post fixation ,specimen were fixed in 1% osmium tetroxide for one hour, followed by dehydration with increasing concentrations of ethyl alcohol and prophylene oxide. Embedding was in Epon 812 and semi-thin section was stained with toluidine blue, thin section with uranyl acetate and lead citrate, and observed, photographed with TEM. The obtained results were as follows: 1. Epitherial downgrowth to the apex of implant was observed. 2. Generally, epithelial width of upper part of implsnt was thicker than lower and epithelial tissue has no digitation form. 3. The loose fibrous connective tissue with inflammatory cells was observed beneath the epithelium. 4. Near the epithelial invagition, in connetive tissue showed inflammatory cells with mast cell.
투과전자현미경으로 관찰한 치과 임프란트 계면 골조직 반응 : 임상에서 제거된 즉시 매식한 단독 임프란트 하단의 감염조직 Transmission Electron Microscope
徐奎源,保坂光雄,Kim, Daniel S. 고려대학교 임프란트 연구소 1999 임프란트연구지 Vol.1 No.1
The use of immediate implants has increases in recent year for the many advantages of treatment pocedure. However, the immediate placement of implant may involve complications leading to implant failure. In spite of the most meticulous attempts for sterility and precautionary surgical techniques, patients have developed a variety of complications with immediate implantation. Many clinical reports have described the case of Peri-implant infections with involvement of the coronal portion of the implants. However another type of infection, characterized by the focal infection at the hole and apex of an implant, as we has been described. The aim of the present case report is an evaluation of the clinical and ultrastructural aspects of interfacial tissues from a retrieved immediate implant in which there had been the development of an abcess at the apical tissues of a titanium implant from 60 years old female patient. The pathological tissues of the immediate single implant was observed by transmission electron microscope without decalcification procedure. The results were as follows. Bacterial infection was the cause of implant failure. Transmission electron micmgraph demonstrating lipidoid and proteinaceous substances
임용규,권종진 고려대학교 임프란트 연구소 2000 임프란트연구지 Vol.2 No.1
Implantology is rapidly becoming an established part of the overall dental treatment strategies and is also increasingly being integrated into orthodontic treatment concepts. Anchorage control is of greatest importance in orthodontic treatment planning and dictates the treatment objectives. Osseointegrated titanium implants are used as orthodontic anchorage remained in position when orthodontically loaded for the various tooth movement and will greatly expand the range of biomechanical possibilities.
복강 속에 매식한 티타늄합금의 조직반응에 관한 광학현미경적 관찰
구송희,서규원 고려대학교 임프란트연구소 2001 임프란트연구지 Vol.3 No.1
The development of titanium alloys for biomedical and dental applications is currently an area of implant research. The skin is a particularly favorable organ for studying the principles of pathology, including pathogenesis. Round coin shaped titanium alloy (Titanium-13Zirconium-6Niobium) were machined with 4mm diameter, 1mm thickness and 1mm diameter hole in center. 8 samples were submerged into the Peritoneum of Rat. of 8 Sprague-Dawley rats. The 3-months intra peritoneum of implantation showed a range of implant applications by microscopic study. The present paper describes of evaluation of Ti-13Nb-13Zr Titanium alloy has low inflammation, fibrosis and no necrosis. Titanium alloy improved biocompatibility and could be used as a standard biomaterial.
과도한 하중으로제거된 임프란트 주위조직의 투과전자현미경적 관찰
서규원 고려대학교 임프란트 연구소 2000 임프란트연구지 Vol.2 No.1
Overloading, infection and impaired healing are considered the major etiologic factors for the fail of dental implants. The treatment of failing implants is depends on the knowledge and skill based on entirely on experience, from periodontal research, and from interesting case reports performed on a trial-and-error basis. The aim of the study is and evaluation of the ultrastructural aspect of interfacial tissues from retrieved implants in which there had been overloading for 1 year to the right and left lower 1st molar areas. After removal of peri-implant tissues, they were prepared and observed by transmission electron microscope without decalcifiction procedure. The results were as follows. Transmission electron microscopy revealed destruction of the cells and tissues, degradation of the collagen fibers with micro-organisms. Overloading could be related to abnormal bone remodeling sequence.
과도한 하중으로 제거된 임프란트 주위조직의 투과전자현미경적 관찰
서규원 고려대학교 임프란트연구소 2001 임프란트연구지 Vol.3 No.1
Overloading, infection and impaired healing are considered the major etiologic factors for the fail of dental implants. The treatment of failing implants is depends on the knowledge and skill based on entirely on experience, from periodontal research, and from interesting case reports performed on a trial-and-error basis. The aim of the study is an evaluation of the ultrastructural aspect of interfacial tissues from retrieved implants in which there had been overloading for 1 year to the right and left lower 1st molar areas. After removal of peri-implant tissues, they were prepared and observed by transmission electron microscope without decalcifiction procedure. The results were as follows. Transmission electron microscopy revealed destruction of the cells and tissues, degradation of the collagen fibers with micro-organisms. Overloading could be related to abnormal bone remodeling sequence.