| Summary: | 碩士 === 正修科技大學 === 機電工程研究所 === 105 === Bone saw blade is an important tool for surgical applications, and bone cutting will lead to bone temperature rise and saw blade wear, how to reduce the risk of thermal necrosis and infection is an important issue. The purpose of this study is to investigate the cryogenic treatment on temperature rise and wear resistance during bone cutting, and to compare the differences of the bone saw blades without/with the cryogenic treatment by cutting biomechanical materials and porcine bone testing with domestic K&W and SYNTHES bone saw blades, in terms of feed force, thermal exposure and wear. Cutting biomechanical materials was performed on a material testing machine which can control the feed rate and depth of the hole, and measuring the temperature changes with the thermocouple during the cutting process; porcine bone testing was performed by cutting living porcine tibia directly, and with the infrared thermometer measuring the temperature, and sampling tissue for thermal necrosis analysis. The experimental results showed that there was no significant difference in the temperature rise, the maximum temperature and the abrasion, and obvious difference in the feed force of SYNTHES bone saws before and after cryogenic treatment. There was no significant difference in the maximum temperature of the bone saw blades and cell viability assay with/without cryogenic treatment, but the thermal necrosis of tissues during bone cutting was obviously reduced after cryogenic treatment. The preliminary result showed that the cryogenic treatment was beneficial, but the temperature, wear and tissue thermal necrosis were not consistent at present, and a more detailed analysis should be further explored and verified.
Keywords: Bone saw blade; Cryogenic treatment; Wear; Thermal necrosis
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