Investigating on Mechanical and Biological Properties of Silica/Dolomite for Bioceramics Using 3D Printing

• Main Authors: Lan, Yu-Sheng, 藍煜勝
• Other Authors: Liu, Fwu-Hsing
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/cz3627

碩士 === 龍華科技大學 === 機械工程系碩士班 === 105 === Silica is a common biomedical ceramic material with good biocompatibility and cell adhesion, but its mechanical properties are poor and don't have biodegradability.　Therefore, this study was added dolomite (CaMg (CO3)2) in the silicon dioxide, and silicon dioxide to promote the synthesis of calcium silicate and diopside, thereby to enhance the possibility of degradation of the ceramic support as biomedical and biological mechanical strength. In this study is the use of silicon dioxide powder, dolomite powder, and silicon dioxide sol as a starting material, these three materials with different ratios of three kinds of slurries of different formulations in accordance with the scale bar in the three-dimensional printing by selective laser sintering condensate Plastic technology to produce ceramic embryos. To explore the different proportion of the formula after 1100 ℃, 1200 ℃, 1250 ℃, 1300 ℃ heat treatment after the mechanical and biological properties to find a better proportion to make porous pore holder. The experimental results show that the silica powder 3.5 g, 4.5 g and silica sol 5 g is the best material ratio. The cell viability was as high as 90% and the degradation rate was 7.6% after six weeks in vitro. The compressive strength was 19.8 Mpa and the flexural strength was 12.29 Mpa. Using a laser power laser scanning speed of 300 mm / s and a laser scanning distance of 0.1 mm, a silicon dioxide / dolomite degradable ceramic support with an internal communication hole can be stably prepared.