可溶性晶体性质对生物骨材料切削质量影响因素探究

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

为了弥补传统磨料水射流可能造成的磨料残存不利于组织愈合且存在毒害影响的不足,采用具有生物相容性的氯化钠、蔗糖和木糖醇3种可溶性晶体颗粒为磨料,通过改变横移速度和靶距对牛股骨进行切削,测量其表面粗糙度和切削深度,探究可溶性晶体性质对生物骨切削质量的影响。结果表明:氯化钠、蔗糖和木糖醇3种可溶性晶体颗粒作为磨料掺入射流束中,能够明显改善纯水射流切削生物骨材料的质量;可溶性晶体的密度、硬度、溶解性和晶体结构等性质对切削质量均有影响,在能够完全切透骨样的情况下,其中的密度差异表现最明显,密度小的可溶性晶体加工得到的骨样粗糙度更小;在不能够完全切透骨样的情况下,其中的溶解性差异表现最明显,溶解速度慢的晶体加工得到的骨样切削深度更大。在试验设计的参数条件下,3种可溶性晶体射流都能够完全实现生物骨材料的稳定切割,用密度最小的木糖醇颗粒为磨料切削时,在压力为280 MPa,横移速度为10 mm/min,靶距为1 mm时,表面粗糙度值Ra最小,Ra值为3.19μm;用溶解速度慢的蔗糖为磨料,在压力为280 MPa,横移速度为10 mm/min,靶距为1 mm时,最大切削深度值为47.15 mm。

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 Ra is 3.19μm 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.