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Incidence of pterygospinous and pterygoalar bridges in dried skulls of Koreans
류솔지,박민규,이우영,곽현호 대한해부학회 2016 Anatomy & Cell Biology Vol.49 No.2
Understanding of morphological structures such as the sphenoid spine and pterygoid processes is important during lateral transzygomatic infratemporal fossa approach. In addition, osseous variations such as pterygospinous and pterygoalar bridges are significant in clinical practice because they can produce various neurological disturbances or block the passage of a needle into the trigeminal ganglion through the foramen ovale. Two hundred and eighty-four sides of Korean adult dry skulls were observed to carry out morphometric analysis of the lateral plate of the pterygoid process, to investigate, for the first time among Koreans, the incidence of the pterygospinous and pterygoalar bony bridges, to compare the results with those available for other regional populations, and to discuss their clinical relevance as described on literatures. The mean of maximum widths of the left and right lateral plates of the pterygoid process were 15.99 mm and 16.27 mm, respectively. Also, the mean of maximum heights of the left and right lateral plates were 31.02 mm and 31.01 mm, respectively. The ossified pterygospinous ligament was observed in 51 sides of the skulls (28.0%). Ossification of the pterygospinous ligament was complete in four sides (1.4%). In 47 sides (16.6%), the pterygospinous bridge was incomplete. The ossified pterygoalar ligament was observed in 24 sides of the skulls (8.4%). Ossification was complete in eight sides (2.8%) and incomplete in 16 sides (5.6%). This detailed analysis of the lateral plate of the pterygoid process and related ossification of ligaments can improve the understanding of complex clinical neuralgias associated with this region.
고체 윤활 층의 미세구조 변화에 따른 우주발사체 엔진 터보펌프용 극저온 베어링 회전특성 변화에 관한 연구
김초희,서우석,민형섭,최복성,류솔지,이병국,이용복,이전국,최용 한국항공우주학회 2014 한국항공우주학회 학술발표회 논문집 Vol.2014 No.11
모재 SUS440C에 고체 윤활을 코팅하였다. 은 재료의 밀도를 변화시키기 위하여, 전기도금 용액의 이온 농도를 30~90g/ℓ까지 변화시켰다. 극저온에서의 액체 질소 상태에서는, 11000rpm의 고속회전 특성이 은 재료의 밀도 변화에 따라 관찰되었다. 또한, 회전 실험 후에, 은코팅된 표면의 미세구조 변화와 물질의 이동 현상을 광학 현미경을 통해 살펴보았다. 그 후, 상호적인 관계를 분석하였다. The basic material of SUS440C was coated with a solid lubricant. To change the density of silver material, the ion concentration of the electroplating solution was changed for 30 ~ 90g /ℓ . when it was liquid nitrogen condition at very low temperature, the characteristic of high speed rotation of 11000 rpm speed was observed according to density changes of silver material. also, after rotation experiment, the changes of fine structure of silver-plated surface and the phenomena of material moving was observed through Optical Microscope, and its mutual relation was analyzed.