Influence Of Different Titanium Surface Modification On Calcium Salt Deposition

Objective:To discuss the impact of different implant surface preparation methodstowards calcium deposition, and provide evidence for the influence of bone bondingstrength among different implants.Methods: Titanium surface created by Machined technique (M), magnetron ionsputtering, sand blasting and acid etching (SLA) were analyzed using laser scanningconfocal microscope (CLSM) to detect surface roughness, and scanning electronmicroscope (SEM) to observe the microstructure. Samples of different surfacetreatments were immersed in a simulated body fluid(SBF). Three different kinds ofimplants with surfaces of hydroxyapatite coating (such as BLB), TiO2coating (suchas Replace), and rough surface after SLA (such as ITI), were also immersed in asimulated body fluid. SEM and energy dispersive X-ray spectrometer (EDS) wereused to analyze surface element. X-ray diffraction (XRD) was used to specify thetype of compound. The decalcifying was used to detect total calcium determination insimulated body fluid.Results: After mechanical processing, magnetron ion sputtering and SLA, the surfaceof the titanium sample formed a smooth surface, the titanium oxide coating surfaceand the rough surface respectively. After immersed in SBF, the results show that thethree groups of titanium surface sediment content were gradually increased. Depositcontent of the magnetron ion sputtering groups and the SLA group is higher thansmooth group, and SLA group is the highest. Compound of deposit were basicallyhydroxyapatite (HA), the speed and quantity of calcium salt is much higher in1.5×SBF than SBF. The amount of calcium salt deposit on the commercial implant ishigher than the manual processing sample. The implant with HA coated has HAexisted on the surface consistently. The implant with SLA deposited more calcium salt than TiO2coating.Conclusion: Rough and titanium oxide coating surface on titanium deposited morecalcium salt than the smooth ones. The rough surface titanium sample depositionamount is the highest. In1.5×SBF, the speed of calcium salt deposition on titaniumis faster than SBF; commercial implant has a better surface treatment accuracy andsurface morphology than manual processing titanium sample.