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Distraction Osteogenesis Update : Introduction of Multidirectional Cranial Distraction Osteogenesis
Gomi, Akira,Sunaga, Ataru,Kamochi, Hideaki,Oguma, Hirofumi,Sugawara, Yasushi The Korean Neurosurgical Society 2016 Journal of Korean neurosurgical society Vol.59 No.3
In this review, we discuss in detail our current procedure for treating craniosynostosis using multidirectional cranial distraction osteogenesis (MCDO). The MCDO method allows all phenotypes of skull deformity to be reshaped by distraction osteogenesis, except in patients who are 5 months of age or younger and patients with posterior cranial vault problems. We report the results of clinical data of 36 children with craniosynostosis who underwent MCDO between 2005 and 2014 in our institute. This method has the following benefits, such as a high flexibility of reshaping, shorter treatment period and less invasive secondary intervention. We also discuss the other distraction osteogenesis techniques that are used to treat craniosynostosis and compare them with MCDO. The preferred procedure for correction of craniosynostosis may depend on the patient's age, the extent of deformity, and the extent of correction achievable by surgery. We can arrange the combinations of various methods according to the advantage and disadvantage of each technique.
Properties of sedimentary clays for Karatsu ware
KATSUKI, Hiroaki,KAWAHARA, Akihiko,KAMOCHI, Nobuaki,PEE, Jae-Hwan,CHO, Woo-Seok,KIM, Hyung-Tae CERAMIC SOC OF JAPAN 2014 JOURNAL- CERAMIC SOCIETY JAPAN Vol.122 No.1428
<P>Four sedimentary clays for Karatsu ware which were geologically derived from the weathered sandstone and granite were mined and used in this study. The chemical composition, mineral composition and morphology of minerals were investigated by XRF, XRD, SEM and TEM analysis. The mineral composition of normative alpha-quartz, feldspar and kaolin of two clays were 43.1, 4.7, and 44.3, and 52.1, 21.3, and 27.0, respectively. These clays had lower content of feldspar and higher content of kaolin than those of clays prepared from some sandstone for Karatsu ware. Average size of coarse particles in four clays was 22-28 mu m and maximum particle size were 188-290 mu m, and these sizes were similar to those of clays prepared from sandstone. It was suggested that the decomposition of feldspar to sericite and kaolin was promoted by the weathering and hydrolysis of sandstone or granite. (C) 2014 The Ceramic Society of Japan. All rights reserved.</P>