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Surface analysis of failed implants
Su-Gwan Kim, Young-Jong Kim, Yong-Min Kim, Young-Kyun Kim 대한치과이식임플란트학회 Journal of Dental Implant Research 7 Pages
대한치과이식임플란트학회 Journal of Dental Implant Research 2004, 제 23권 1호 1 1-7 (7 pages)
Y : Effect of surface roughness of hydroxyapatite-coated titanium on the bone-implant interface shear strength. Biomaterials 15:1187-1191, 1994. 22. Hong L, Xu HC, de Groot K : Tensile strength of the interface between hydroxyapatite and bone. J Biomed Mater Res 26:7-18, 1992. 23. Chae JC, Collier JP, Mayor MB, Surprenant VA, Dauphinais LA : Enhanced ingrowth of porous-coated CoCr implants... Knowledge of the concept of osseointegration has enhanced the success of dental implants owing to improved understanding of the concept of bone stress and bone response. Longitudinal clinical studies report 10-year successrates of 81-85% for implants in the maxilla and 98-99% for implants in the anterior mandible1). In 1989, the main causes of implant failure were the selection of inappropriate patients and the accumulation of residue owing to the use of improper prosthetic restoration... -
Effect of the surface modification using MWCNTs with different L/D by two different methods of deposition on the IFSS of single carbon fiber-epoxy resin composite
Minerva L. Herrera-Sosa, Alex Valadez-Gonz?lez, Humberto V?zquez-Torres, Pierre G. Mani-Gonz?lez, Pedro J. Herrera-Franco 한국탄소학회 Carbon Letters 10 Pages
한국탄소학회 Carbon Letters 2017, Vol.24 3 18-27 (10 pages)
smooth surface is observed without any vis- ible imperfections. In Fig. 1b and c, the CFs treated with the silane Z6040 (CFsi) and those treated with PAMAM (CFp) respectively, some roughness on their surface is appreciated; in the silanized samples a rougher surface is visible, which could be due to being subjected to a more severe treatment with the nitric acid. Fibers treated with the PAMAM... Multiwall carbon nanotubes (MWCNT) with two different (L/D) aspect ratios (7±2 μm/140±30 nm and 0.5?2 μm/8?15 nm) were surface treated using nitric acid (HNO3) and polyethyleneimine (PEI) prior to their deposition on carbon fibers (CF). Before the hierarchical reinforcement with CF-MWCNT, the CFs were treated with 3-glycidoxypropyltrimethoxysilane, a coupling agent (Z6040) and with poly(amidoamine) (PAMAM) a dendrimer containing an ethylenediamine core and amine surface groups. The MWCNT... -
Implant stability, marginal bone change and success rate of DIO� SM submerged internal-type implants placed at the posterior missing area: A prospective single arm clinical trial
Bo-Han Li, Kang-Mi Pang, Jong-Chul Park, Soung-Min Kim, Ji-Eun Moon, Jeong-Yeon Yun, Seung-Ryong Ha, Jae-Bong Lee, Myung-Jin Kim, Jong-Ho 대한치과이식임플란트학회 Journal of Dental Implant Research 8 Pages
대한치과이식임플란트학회 Journal of Dental Implant Research 2010, 제 29권 1호 10 71-78 (8 pages)
machined resorbable blast media (RBM) surface consisting of hydroxyapatite (beta-tricalcium phosphate, Alpha-Acp.TTcp. and calcium pyrophosphate (CPP)) to enhance implant insertion depth. This provides an even roughness without leaving embedded debris and acid residue on the implant surface. Such design and surface treatments are important elements for the long-term success of dental implants, and... The present clinical study was undertaken to evaluate the implant stability, marginal bone change and the survival rate of DIO� SM submerged internal-type implants placed at the partially edentulous posterior missing area. In this prospective study, 72 patients treated with 111 DIO� SM submerged internal-type implants placed at the posterior maxilla or mandible after loss of single or multiple teeth were included. The ISQ (implant stability quotient) value was measured after the first and second... -
Feasibility Study for Detection of Turnip yellow mosaic virus (TYMV) Infection of Chinese Cabbage Plants Using Raman Spectroscopy
한국식물병리학회 The Plant Pathology Journal 5 Pages
한국식물병리학회 The Plant Pathology Journal 2013, 29권 1호 13 105-109 (5 pages)
Microchemical J. 95:96101. Matthews, R. E. F. 1958. Studies on the relation between protein and nucleoprotein particles in turnip yellow mosaic virus infections. Virology 5:192 Moskovits, M. 1978. Surface roughness and the enhanced inten- sity of Raman scattering by molecules adsorbed on metals. J. Chem. Phys. 69:4159 Moskovits, M. 2005. Surface-enhanced Raman spectroscopy: A brief retrospective.... of Raman measurement, surface enhanced Raman scattering (SERS) was employed. Spectra of extracts from healthy and Turnip yellow mosaic virus (TYMV) infected Chinese cabbage leaves were collected by mixing with gold (Au) nanoparticles. Our result showed that TYMV infected plants could be discriminated from non-infected healthy plants, suggesting the current method described here would be an alternative potential tool to screen virus-infection of plants in fields although it needs more studies to... -
Potential Roles of Essential Oils on Controlling Plant Pathogenic Bacteria Xanthomonas Species: A Review
한국식물병리학회 The Plant Pathology Journal 18 Pages
한국식물병리학회 The Plant Pathology Journal 2011, 27권 3호 2 207-224 (18 pages)
of the cell wall, together with increased roughness and lack of cytoplasm have recently been reported in Xanthomonas pathogens on treatment with Metasequoia essential oil (Bajpai et al., 2010b; Rasooli et al., 2006). Components of essential oils also appear to act on cell proteins embedded in the cyto- plasmic membrane (Knobloch et al., 1989). Enzymes such as ATPases are known to be located in the... Diseases caused by plant pathogenic bacteria constitute an emerging threat to global food security. Xanthomonas is a large genus of Gram-negative bacteria that cause disease in several host plants leading to considerable losses in productivity and quality of harvests. Despite the ranges of controlling techniques available, the microbiological safety of economically important crops and crop plants including fruits and vegetables continues to be a major concern to the agriculture industry. On the... -
Microbial Population, Aflatoxin Contamination and Predominant Aspergillus Species in Korean Stored Rice
한국식물병리학회 The Plant Pathology Journal 9 Pages
한국식물병리학회 The Plant Pathology Journal 2010, 26권 2호 4 121-129 (9 pages)
a Present isolate AF317 Reference isolate KACC 41846 Klich (2002) Stipe Length b 300-400 μm 300-400 μm 200-500 μm Roughness Smooth Smooth Smooth to finely roughened Vesicle Shape Globose Globose to subglobose Globose to elongate Metulae coverage Entire surface Entire surface Entire surface Conidia Shape Globose to subglobose Globose to subglobose Globose to slightly ovoid Length 3-4 μm 3 - 4... We evaluated microbial populations and aflatoxin production in unhulled and white rice from rice processing complexes of the National Agricultural Cooperative Federation in five regions in Korea and identified three predominant Aspergillus species. Fungal and bacterial populations in rice samples were significantly different between regions in 2007. Aflatoxins were also detected and varied at the levels of 2.45 - 3.43 ng per g unhulled rice grain and 1.29 - 2.09 ng per g white rice grain.... -
First Detection of Penicillium fellutanum from Stored Rice in Korea
한국식물병리학회 식물병연구 2011, 17권 2호 16 216-221 (6 pages)
Shape Subglobose to ellipsoidal Subglobose to ellipsoidal Ellipsoidal Length 2.53.6 m 2 . 63.6 m 2 . 53.2 m Roughness Smooth Smooth Smooth or finely roughened Phialide length c 69 m 59 m 510 m Metulae length 1419 m 1 419 m 1 030 m Stipe Length 3140 m 3 040 m d Roughness Smooth Smooth Smooth Conidiophore Branching pattern Monoverticillate Monoverticillate Monoverticillate Appressedness Appressed... -
Lyocell-based activated carbon fibers improved the adsorption of harmful gas properties when produced via dual-simultaneous treatments
Byong Chol Bai, Ji Sun Im, Young-Seak Lee 한국탄소학회 Carbon Letters 5 Pages
한국탄소학회 Carbon Letters 2017, Vol.23 10 69-73 (5 pages)
of the manufactured sample. The surface roughness of the non-activated Lyocell fber was observed to be smooth, and the average diameter was approxi- mately 13±1.0 μm. Following activation, the average diameter of the ACFs was approximately 8±1.0 μm because the Lyocell fbers were degraded at the activation temperatures. It was con- frmed that some of the unreacted urea was quite uniformly... In gas adsorption processes, activated carbon fibers (ACFs) are used for the adsorption of the harmful gases that are generated by coal or oil combustion, and they have been widely studied [1,2]. ACFs have been used for harmful gas removal because of their specific surface area, micropores, reproducibility, safety, and processing ability, which are beneficial properties for a wide range of applications [3,4]. -
Hole quality assessment of drilled CFRP and CFRP-Ti stacks holes using polycrystalline diamond (PCD) tools
Dave Kim, Aaron Beal, Kiweon Kang, Sang-Young Kim 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2017, Vol.23 1 1-8 (8 pages)
conductivity, the increased temperature of the Ti region negatively affects tool wear and hole size [9]. 3.4. Surface roughness Fig. 6 shows the Ra and Ry values for every 20 holes for CFRP and Ti. PCD created a very smooth surface when drilling standalone CFRP. However, the presence of Ti in the CFRP-Ti stacks negatively affects the hole surface roughness (Fig. 6a) of CFRP. Fig. 6a and b... drilled for the next 20 holes with the same drill bit. CFRP holes and CFRP-Ti stack holes were evaluated in terms of machined hole quality. The main tool wear mechanism of PCD drills is micro-fractures that occur when machining the Ti plate of the stack. Tool wear increases the instability and the operation temperature when machining the Ti plate. This results in high drilling forces, large hole diameter errors, high surface roughness, wider CFRP exit thermal damage, and taller exit Ti burrs. -
Effects of electrochemical oxidation of carbon fibers on interfacial shear strength using a micro-bond method
Dong-Kyu Kim, Kay-Hyeok An, Yun Hyuk Bang, Lee-Ku Kwac, Sang-Yub Oh, Byung-Joo Kim 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2016, Vol.19 4 32-39 (8 pages)
oxidation, the value of the root mean square average roughness (Rq) was increased from 50.9 to 90.7 μm. The electrochemical oxidation reaction generally damages the CFs and leads to deep grooves and edges on the CF surface, and this is believed to account for the greater roughness. This increase in surface roughness should be advantageous for mechanical properties of CFPRs because a rough... microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and single-fiber contact angle. The mechanical interfacial shear strength of the CFs/epoxy matrix composites was investigated by using a micro-bond method. From the results, electrochemical oxidation treatment introduced oxygen functional groups and increased roughness on the fiber surface. The mechanical interfacial adhesion strength also showed higher values than that of an untreated CF-reinforced composite.