Background: Modifications in the morphology, chemical, physical-chemical properties of the implant surface and its influence on the osseointegration process have been the goal of many studies over the last years. 
Aim: The objective of this study was to characterize osseointegration implants (Ti-cp) with machined surface (MS), laser-modified surface (LS) and laser-modified surface followed by hidroxiapatite (HA) deposition. 
Materials and Methods: For this purpose, topographic characterization was performed by scanning electron microscopy, SEM-EDX dispersive energy spectrometry. Mean roughness measurements, cross-sectional roughness measurements, contact angle, X-ray Diffractometry (DRX) and Confocal Laser Optical Profiling of the three surfaces were also obtained. The data obtained by the roughness analysis (mean roughness) were taken to analysis of variance and Tukey t test. 
Results: The MEV of MS showed smooth surface, contaminated with machining residues, while LS and HA produced rough surfaces with a more regular and homogeneous morphological pattern. Analysis by EDX did not reveal any contamination of the analyzed surfaces, and showed Ti peaks for MS and Ti and oxygen for LS and HA. The mean roughness values of LS and HA were statistically higher (p <0.05) when compared to MS. The roughness values in cross section were 21.76 ± 9.05 μm and 28.75 ± 10.12 μm respectively for LS and HA. The contact angle of LS and HA was 0º, allowing high wettability. The DRX of MS showed only Ti peaks, while LS and HA showed the presence of oxides and nitrides. In HA implants the DRX also showed the presence of hidroxiapatite. 
Conclusion: In view of the results obtained, it was concluded that the modifications performed in the LS and HA implants promoted important modifications in the topography and physical-chemical properties of the analyzed surfaces.

Topographic characterization of cp-Ti implants with machined surface and modified surface by laser beam