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임플란트 주위염 치료시 치아회분말과 치과용 연석고의 혼합 매식의 골재생 효과
최희연,김학균,김수관,문성용,김상렬,박광범,김용민,임성철,김은석,이정훈,Choi, Hee-Yeon,Kim, Hak-Kyun,Kim, Su-Gwan,Moon, Seong-Yong,Kim, Sang-Yeol,Park, Kwang-Bum,Kim, Young-Min,Lim, Seong-Chul,Kim, Eun-Seok,Lee, Jeong-Hoon 대한악안면성형재건외과학회 2008 Maxillofacial Plastic Reconstructive Surgery Vol.30 No.2
The purpose of this study was to evaluate histomorphometrically a toothash - plaster of Paris mixture associated with collagen membrane ($Bio-Gide^{(R)}$), regarding new bone formation in the peri-implantitis defects in dogs. Three mandibular molars were removed from 1-year-old mongrel dogs. After 2 months of healing, 2 titanium implants with sandblasted with large grit and acid etched (SLA) surface were installed in each side of the mandible. Experimental peri-implantitis was induced with ligatures after successful osseointegration. Ligatures were removed after identification of bone defect beneath the level of 5th thread of fixture on radiographic image. The mucoperiosteal flaps were elevated and the contaminated fixtures were treated with chlorhexidine and saline. The bone defects were assigned to one of the following treatments: no guided bone regeneration (GBR) procedure (group 1), GBR with Bio-$Oss^{(R)}$ and Bio-$Gide^{(R)}$ (group 2), or GBR with toothash - plaster of Paris mixture (TPM) and Bio-$Gide^{(R)}$ (group 3). The dogs were sacrificed after 8 or 16 months. The mean percentages of new bone formation within the limits of the 5 most coronal threads were $17.83{\pm}10.69$ (8 weeks) and $20.13{\pm}13.65$ (16 weeks) in group 1, $34.25{\pm}13.32$ (8 weeks) and $36.33{\pm}14.21$ (16 weeks) in group 2, and $46.33{\pm}18.39$ (8 weeks) and $48.00{\pm}17.78$ (16 weeks) in group 3, respectively. The present study confirmed statistically considerable new bone formation within the threads in group 3 compared with group 1 at 8 and 16 weeks (P<0.05). Although, data analysis did not reveal significant differences between group 2 and 3, the latter showed better results during the period of 8 or 16 weeks. Our findings support the effectiveness of TPM as a GBR material in the treatment of peri-implantitis bone defect.
납사분해공정 잔사유로부터 탄소재료용 전구체 핏치의 제조
김명수,김상렬,황종식 ( Myung Soe Kim,Sang Yeol Kim,Jong Sic Hwang ) 한국유화학회 1997 한국응용과학기술학회지 Vol.14 No.1
PFO(pyrolized fuel oil) and C_10^+ oil, which are the residual heavy oils form a NCC(naphtha cracking center), were heat-treated to produce the prccursor-pitch for carbon materials. After PFO was initially distilled near 300℃ to separate the volatile matters recovering as high-quality fuel oil, the residuum of nonvolatile precursor-pitch was then thermally pyrolized in the temperature ranges from 350℃ to 450℃ Spinnable isotropic pitch with the softening point of 200℃ and the toluene insolubles of 36wt% was obtained at 365℃, and then was successfully spun through a spinneret(0.5mm diameter). After spin- ning, an isotropic carbon fiber of 25㎛ diameter was obtained via oxidation and craboniation procedures. Mesophase spherules began to be observed from the product pitch pyrolized at 400℃, and bulk mesophase with a flow texture was observed above 420℃. In the case of 10_10^+ was the feed was polymerized in the presence H_2SO_4 at room temperature to increase the molecular weight and then heat-treated gradually up to 200~250℃ The products obtained with the softening point of 80~190℃ were carbonized at 500 and 1000℃ to examine the morphology.