アブストラクト（20巻2号：The Bulletin of Kanagawa Dental College）

The Bulletin of Kanagawa Dental College

English

Title　： Comparison of Bone Aging in Space and on Earth
Subtitle　： BKDC CLINICAL AND RESEARCH TOPICS Aging : Effect of Lifespan
Authors　： Takashi Sakurai, Takahiko Matsuki, Megumi Ishii, Kousuke Nishimura, Isamu Kashima
Authors（kana）　：
Organization　： Department of Oral and Maxillofacial Radiology, Kanagawa Dental College
Journal　： The Bulletin of Kanagawa Dental College
Volume　： 20
Number　： 2
Page　： 195-201
Year/Month　： 1992 / 9
Article　： Report
Publisher　： Kanagawa Odontological Society
Abstract　： [Introduction] The urinary calcium (Ca) excretion of astronauts is known to increase during long-term orbital life in space, despite the normal serum Ca levels. Reports indicate that once Ca decreases, it does not recover completely even after five years, and that this is accompanied by a lower bone density than the preorbital level. Experimental findings in the rat have suggested that Ca loss occurs primarily in weight-bearing bone, a hypothesis that needs to be investigated in greater detail. With the advent of the era of space development, there is an urgent need to clarify the relationship between gravitation and bone changes and to devise measures to combat such bone changes. In December 1990, the joint USSR-Japanese "frog-in-space" (FRIS) project was conducted on the "MIR" space station. We participated in the FRIS project for the purpose of visualizing the effect of gravitational changes on bone by an imaging technological analysis using laser-stimulated luminescence. The resultant minor bone changes due to gravitational changes were compared with aging of mandibular bone trabeculae occurring on earth.
Practice　： Dentistry
Keywords　： Computed Radiography, Gravity Exposure, Bone Trabecular Pattern, Imaging Plate, Microfocus Tube