Influence factors of soluble crystal properties on cutting quality of biological bone materials

The traditional abrasive water jet may cause abrasive, which is unfavorable to the remnant healing. There also exists the shortage of the deleterious effects of sodium chloride with biocompatibility. In order to solves the problems, three soluble sucrose and xylitol crystal particles are used as abrasives. This study, by changing the traverse speed and target distance to cut cattle femur, measures the surface roughness and cutting depth to explore the effect of soluble crystal properties on the cutting quality of biological bone. The results show that adding sodium chloride, sucrose and xylitol into the jet beam as abrasive can obviously improve the lack of pure water jet cutting biological bone materials with high quality. The density, hardness, solubility and crystal structure of soluble crystals all have an effect on the cutting quality, among which the difference of density is the most obvious in the case of complete cutting of transvious crystal. The roughness of bone is smaller when the soluble crystal with low density is processed. In the case of not being able to completely cut the transvious bone, the difference in solubility was the most obvious. The cutting depth of the bone is greater when the crystal with slow dissolution rate is processed. Under the parameters designed in the experiment, the three kinds of soluble crystal jets can fully realize the stable cutting of biological bone materials. Using the xylitol particles with the lowest density as abrasive, the minimum surface roughness R_a is 3.19 μm when the pressure is 280 MPa, the transverse velocity is 10 mm/min and the target distance is 1 mm. The maximum cutting depth of 47.15 mm is obtained when the pressure is 280 MPa, the transverse velocity is 10 mm/min and the target distance is 1 mm.