Surface wettability change after titanium surface laser processing
Łukaszewska-Kuska Magdalena 1, Barylyak Adriana 2, Bobitski Yaroslav 3,4, Krawczyk Piotr 5, Dorocka-Bobkowska Barbara 1
1 - Department of Prosthodontics and Gerodontology, Poznan University of Medical Sciences, Bukowska 70, 60-812 Poznań, Poland
2 - Department of Therapeutic Dentistry, Danylo Halytsky Lviv National Medical University, Pekarska 69b, 79010 Lviv, Ukraine
3 - Department of Photonics, Lviv Polytechnic National University, Bandera 12, 79013 Lviv, Ukraine
4 - College of Natural Sciences, University of Rzeszow, Pigonia 1, 35-310, Rzeszow, Poland
5 - Institute of Chemistry and Technical Electrochemistry, Poznan University of Technology, Berdychowo 4, 60-965 Poznań, Poland
Background: The clinical success of endosseous dental implants correlates with their osseointegration. The faster and more intensive the process, the better the results. Osseointegration is related to many features such as the characteristics of the implant surface. The surface wettability, is one characteristic, that influences the host bone reaction. An implants hydrophilic surface can improve the reaction of host bone after implantation and hasten the osseointegration process in vivo, making it a desired surface feature.
Objectives: The aim of this study was to analyze the effect of femtosecond laser modification of titanium on its topography and wettability.
Materials and methods: Femtosecond laser processing in two (A-B) different conditions was performed on the surface of titanium previously sandblasted with carborundum and covered with hydroxyapatite (HA) using two distinct regimes (1-2). Laser settings differed in power, velocity, and frequency. The obtained surface modifications were analyzed by means of scanning electron microscopy (SEM), and static contact angle studies were performed to investigate the surface wettability.
Results: Laser processing resulted in two different surface modifications. For the settings A surface was covered with parallel groves while the B laser setting did not change the HA coating. The water contact angle for the first HA coating ranged from 144.8 for the laser setting B up to 146.3 for the laser setting A. For the second HA coating, the results ranged from 20.51 for laser setting A to 56.27 for laser setting B.
Conclusions:
Laser processing condition A resulted in the creation of a laser-induced periodic surface structure. Surface wettability was found to relate to both the laser processing and HA electrodeposition. However, further biological analysis is needed for the evaluation of osseointegration.
Keywords: Processing technologies, coatings, laser processing, periodic surface structure texturing, wettability, titanium