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目的研究激光酸蚀联合纳米管与喷砂酸蚀(SLA)的钛种植体表面粗化处理方法 ,分析比较不同表面理化特性的差异。方法自制表面光滑钛种植体分两组:一组依次采用LT-G20W光纤激光打标机轰击、18%盐酸和49%硫酸的混合物酸蚀、阳极氧化法制纳米管3个工序联合粗化光滑面的纯钛种植体表面;另一组依次采用喷砂(Al2O3颗粒)、18%盐酸和49%硫酸的混合物酸蚀法2个工序粗化钛金属表面。通过扫描电镜(SEM)观察两种植体表面形貌;应用表面电子探针(EPMA)对种植体表面的元素组成和元素化合状态进行分析;应用3D表面形貌仪在白光共聚焦扫描模式下对种植体表面粗糙度进行测试分析。并对两者的表面形貌、化学组分、表面粗糙度等指标进行比较分析。结果成功制备两种粗化的钛种植体表面。激光酸蚀联合纳米管表面的粗糙度大于SLA表面的粗糙度。激光酸蚀联合纳米管组:轮廓算术平方差Ra=(8.19±0.09)μm,轮廓各点高度均方根Rq=(10.64±2.10)μm,轮廓最大峰高度Rt=(43.42±6.18)μm;SLA组:Ra=(2.09±0.13)μm,Rq=(2.70±0.18)μm,Rt=(15.36±0.50)μm,两者统计学差异具有统计学意义(tRa=-16.709,tRq=-9.206,tRt=-10.178,P<0.05);激光酸蚀联合纳米管组的表面清洁;SLA组表面可见尖锐的边缘,散在的一些Al2O3颗粒。结论采用激光酸蚀联合纳米管与SLA的钛表面处理方法均可以获得粗糙表面,前者较后者更为清洁规则,粗糙度更高,可控性更好。
OBJECTIVE To study the surface roughening treatment of laser induced acid etching combined with nanotube and sandblasting (SLA) titanium implant, and to analyze and compare the difference of physical and chemical properties of different surfaces. Methods Self-made surface smooth titanium implants were divided into two groups: one group followed by LT-G20W fiber laser marking machine bombardment, a mixture of 18% hydrochloric acid and 49% sulfuric acid etching, anodic oxidation of nanotubes combined three steps coarsening smooth surface Of the titanium implant surface; the other group followed by sandblasting (Al2O3 particles), a mixture of 18% hydrochloric acid and 49% sulfuric acid etching two processes of titanium surface roughening. The surface morphology of the two implants was observed by scanning electron microscopy (SEM). The elemental composition and elemental chemical state of the implants were analyzed by surface electron probe (EPMA). The surface morphology of the implants was analyzed by using the white surface confocal scanning Implant surface roughness test analysis. The surface morphology, chemical composition, surface roughness and other indicators were compared and analyzed. Results Two roughened titanium implant surfaces were successfully prepared. The surface roughness of the laser-etched nanotubes is greater than the roughness of the SLA surface. In the laser etching combined with nanotube group, the arithmetic mean square deviation (R a) = (8.19 ± 0.09) μm, Rq = (10.64 ± 2.10) μm and Rt = (43.42 ± 6.18) μm, In the SLA group, there was statistical significance between the two groups (Ra = 2.09 ± 0.13μm, Rq = 2.70 ± 0.18μm, Rt = 15.36 ± 0.50μm, tRa = -16.709, tRq = -9.206, tRt = -10.178, P <0.05). The surface of the laser etching combined with nanotube group was cleaned. Some Al2O3 particles scattered sharply on the surface of SLA group were observed. CONCLUSIONS: Laser etching combined with titanium nanotubes and SLA titanium surface treatment method can get a rough surface, the former cleaner than the latter rule, higher roughness, better controllability.