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  • Trans Tech Publications, Ltd.  (7)
  • 1
    Online Resource
    Online Resource
    Study on the Durability of E-Glass Fiber/Vinylester Resin Composites in Various Environment
    Trans Tech Publications, Ltd. ; 2007
    In:  Solid State Phenomena Vol. 124-126 ( 2007-6), p. 835-838
    Details
    In: Solid State Phenomena, Trans Tech Publications, Ltd., Vol. 124-126 ( 2007-6), p. 835-838
    Abstract: The effect of various environmental conditions on durability of E-glass fiber/vinylester resin composites has been investigated with tensile test specimen of strand type. The durability test method performed by strand type specimen was more convenient and reliable than other conventional test method. The weight gain of E-glass fiber reinforced composites increased with the immersion time in both water and alkali solutions, and the weight gains at 80°C were a little greater than ones at 20°C. The tensile strength decreased with the immersion time in all aqueous solution, and the tensile strength in 80°C of alkaline solution decreased most rapidly. The decrement of tensile strength in various environmental conditions was mainly caused by the degradation of interface and damage of glass fiber surface.
    Type of Medium: Online Resource
    ISSN: 1662-9779
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/SSP.124-126
    DOI: 10.4028/www.scientific.net/SSP.124-126.835
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2007
    detail.hit.zdb_id: 2051138-3
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Knee Joint Analysis for Optimal Ligament Surgical Reconstruction Using Three Dimensional Motion Model
    Trans Tech Publications, Ltd. ; 2006
    In:  Key Engineering Materials Vol. 321-323 ( 2006-10), p. 156-160
    Details
    In: Key Engineering Materials, Trans Tech Publications, Ltd., Vol. 321-323 ( 2006-10), p. 156-160
    Abstract: Anterior cruciate ligament(ACL) is liable to a major injury that often results in a functional impairment requiring surgical reconstruction. The success of reconstruction depends on such factors as attachment positions, initial tension of ligament and surgical methods of fixation. The purpose of this study is to find isometric positions of the substitute during flexion/extension. A threedimensional knee model was constructed from CT images and was used to simulate length change during knee flexion/extension. The results showed that minimum length changes were 1.9~5.8 mm(average 3.6±1.4 mm). The proposed method can be utilized and applied to optimal reconstruction for ACL deficient knee.
    Type of Medium: Online Resource
    ISSN: 1662-9795
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/KEM.321-323
    DOI: 10.4028/www.scientific.net/KEM.321-323.156
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2006
    detail.hit.zdb_id: 2073306-9
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    Online Resource
  • 3
    Online Resource
    Online Resource
    Histomorphometric Analysis of Sinus Augmentation Using the ICB and MBCP
    Trans Tech Publications, Ltd. ; 2007
    In:  Key Engineering Materials Vol. 330-332 ( 2007-2), p. 1385-1388
    Details
    In: Key Engineering Materials, Trans Tech Publications, Ltd., Vol. 330-332 ( 2007-2), p. 1385-1388
    Abstract: The purpose of this study is to evaluate the new bone formation of sinus augmentation with using ICB (Irradiated Cancellous Bone & Marrow; Rockey Mountain Tissue Bank, Denver, Co) and MBCP (Micro-Macroporous Biphasic Calcium Phosphate;Biomatlante, France). Study population consisted of 4 patients with maxillary posterior edentulous dentition and ridge heights were less than 5 mm. ICB (Rockey Mountain Tissue Bank, Denver, Co) and MBCP (Biomatlante, France) is mixed with 50: 50. After 6 months, the bone biopsies were done with 2mm trephine bur from lateral window opening. Mean new bone formations were 26.84 %, the residual grafts were 4.92 and soft tissues were 67.98 %. The small number of biopsies did not permit analysis of statistical significance. The variability of individual patient factors do not permit definitive conclusions. The mixtures of ICB & MBCP were superior or comparable to another various bone alternative materials in new bone formation of sinus floor elevation.
    Type of Medium: Online Resource
    ISSN: 1662-9795
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/KEM.330-332
    DOI: 10.4028/www.scientific.net/KEM.330-332.1385
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2007
    detail.hit.zdb_id: 2073306-9
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    Online Resource
  • 4
    Online Resource
    Online Resource
    Bone Formation Effect of HA/β-TCP Composite Powders in Rabbit Calvarial Bone Defects: Histologic Study
    Trans Tech Publications, Ltd. ; 2007
    In:  Key Engineering Materials Vol. 330-332 ( 2007-2), p. 1331-1334
    Details
    In: Key Engineering Materials, Trans Tech Publications, Ltd., Vol. 330-332 ( 2007-2), p. 1331-1334
    Abstract: This study evaluated the histology results of surgically created bone cavities in the calvaria of rabbits that were subsequently filled with a HA/ß-TCP composite powder developed in Korea (Dentium, Korea). Ten young adult rabbits were used. Four defects were surgically produced in the calvaria of each rabbit. These defects were classified into 4 groups: the control group, no graft materials; experimental group I, normal saline + graft materials; experimental group II, venous blood + graft materials; and experimental group III, graft materials only. The defects were randomly filled with the graft materials. The rabbits were sacrificed with at 1-, 2-, 4-, 6- and 8- weeks after surgery. The histology specimens were prepared using the general method with H & E staining at a 6 ㎛ thickness. Histologically, the degree of new bone formation was similar in all experimental groups. However, for experimental group II, many cells had gathered around the graft materials 1-week after surgery, and new bone formed slightly faster and than in the other groups. No bone formation was observed in the control group. Based on histology findings, the new HA/ß- TCP composite powders appeared to act as a scaffolding material for the regeneration of osseous defects.
    Type of Medium: Online Resource
    ISSN: 1662-9795
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/KEM.330-332
    DOI: 10.4028/www.scientific.net/KEM.330-332.1331
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2007
    detail.hit.zdb_id: 2073306-9
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  • 5
    Online Resource
    Online Resource
    Study of Rehabilitation of Injured Knee Joint Applying Chaotic Theory in Human Body Motion
    Trans Tech Publications, Ltd. ; 2007
    In:  Key Engineering Materials Vol. 342-343 ( 2007-7), p. 581-584
    Details
    In: Key Engineering Materials, Trans Tech Publications, Ltd., Vol. 342-343 ( 2007-7), p. 581-584
    Abstract: Gait analysis is essential to identify accurate cause and knee condition from patients who display abnormal walking. Traditional linear tools can, however, mask the true structure of motor variability, since biomechanical data from a few strides during the gait have limitation to understanding the system. Therefore, it is necessary to propose a more precise dynamic method. The chaos analysis, a nonlinear technique, focuses on understanding how variations in the gait pattern change over time. Healthy eight subjects walked on a treadmill for 100 seconds at 60 Hz. Three dimensional walking kinematic data were obtained using two cameras and KWON3D motion analyzer. The largest Lyapunov exponent from the measured knee angular displacement time series was calculated to quantify local stability. This study quantified the variability present in time series generated from gait parameter via chaos analysis. Gait pattern is found to be chaotic. The proposed Lyapunov exponent can be used in rehabilitation and diagnosis of recoverable patients.
    Type of Medium: Online Resource
    ISSN: 1662-9795
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/KEM.342-343
    DOI: 10.4028/www.scientific.net/KEM.342-343.581
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2007
    detail.hit.zdb_id: 2073306-9
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  • 6
    Online Resource
    Online Resource
    Experimental Study of Evaluating Bio-Mechanical Characteristics of Cushioning System Using Nano-Shock Absorption Pocket
    Trans Tech Publications, Ltd. ; 2006
    In:  Key Engineering Materials Vol. 321-323 ( 2006-10), p. 161-165
    Details
    In: Key Engineering Materials, Trans Tech Publications, Ltd., Vol. 321-323 ( 2006-10), p. 161-165
    Abstract: This study developed and evaluated a shoe cushioning system to reduce impact force patterns during running. The shoe cushioning system is composed with a polyurethane pocket, which contains water and porous grains to absorb the force against the weight inside the pocket. Load-displacement curves for the shoe cushioning system were obtained from an instrumented testing machine and the results were compared with various pockets that have air, water or grains. Mechanical testing showed that the pocket with 5 g particles was the best for the shoe cushioning system. This founding will be helpful to designing the shoe.
    Type of Medium: Online Resource
    ISSN: 1662-9795
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/KEM.321-323
    DOI: 10.4028/www.scientific.net/KEM.321-323.161
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2006
    detail.hit.zdb_id: 2073306-9
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    Online Resource
  • 7
    Online Resource
    Online Resource
    Guided Tissue Regeneration of the Mixture of Human Tooth-Ash and Plaster of Paris in Dogs
    Trans Tech Publications, Ltd. ; 2007
    In:  Key Engineering Materials Vol. 330-332 ( 2007-2), p. 1327-1330
    Details
    In: Key Engineering Materials, Trans Tech Publications, Ltd., Vol. 330-332 ( 2007-2), p. 1327-1330
    Abstract: This study evaluated the efficacy of periodontal tissue regeneration using guided tissue regeneration (GTR) with a mixture of tooth ash and plaster as a bone substitute material in the treatment of class II furcation defects in dogs. GTR was performed at the site of a surgically formed mandibular premolar bifurcation area in dogs. Four adult dogs were used in the animal study. The animals were in a good periodontal state without any systemic disease. A resorbable membrane (Bio-Gide®, Swiss) and bone graft material using a mixture of tooth ash and plaster were used to examine the biological activity. The defect in the control group was filled a Bio-Gide® only. For the experimental group, the defects were filled with a mixture of tooth ash and plaster and covered by a Bio-Gide®. Oral rinsing with 0.12% chlorhexidine was performed twice a day for 2 weeks. In control group, new bone formation was observed adjacent to the preexisting bone. Soft tissue ingrowth was also noted. In experimental group, new lamellar type trabecular bone formation as well as centum and PDL regeneration was observed in the base of the infrabony pocket. More bone regeneration would be expected when GTR is performed using a mixture of human tooth-ash and plaster of Paris as a bone graft material.
    Type of Medium: Online Resource
    ISSN: 1662-9795
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/KEM.330-332
    DOI: 10.4028/www.scientific.net/KEM.330-332.1327
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2007
    detail.hit.zdb_id: 2073306-9
    Location Call Number Limitation Availability
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