激光酸蚀联合纳米管与喷砂酸蚀粗化种植体的对比研究

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，tRu=-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A12O3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。

Comparison on the titanium surfaces treated with laser/acid/nanotubes and sandblasted/acid

Objective To compare the difference of titanium surfaces treated by laser/etch/ nanotubes and sandblast/etch technique. Methods Two types of implant surfaces were fabricated by laser/acid etching/nanotubes （LAN） and sandblasting/acid etching （SLA） technique. The first group was treated by combination of laser spraying/18% HC1 ＋ 49% H2SO4 etching/anodization, the second group was treated by combination of A1203 particle sandblasting/18% HC1 ＋ 49% H2SO4 etching. The morphology, roughness and elemental composition were measured with scanning electron microscopy, EPMA and 3D surface topography instrument, respectively. Results Two types of rough implant surfaces were successfully fabricated by the two above mentioned treatment methods. The surface roughness of LAN group was larger than the SLA group （LAN：Ra=8.19＋0.09 μm, Rq=10.64±2.10 μm, Rt=43.42± 6.18 μm ; SLA ： Ra=2.09±0.13 μm, Rq=2.70±0.18 μm, Rt= 15.36 ＋ 0.50 μm） （tRa=- 16.709, tRq=-9.206,tRt=-10. 178,P 〈 0.05）. The surface of LAN was clean, while a few of oxide aluminum particles still existed on the surface of SLA. Conclusion Both LAN and SLA method can produce rough surfaces. The surfaces fabricated by LAN method appeared to be rougher, cleaner, with more regular structures and more controllable than SLA surfaces.