Spectroscopic analysis of titanium surface functional groups under various surface modification and their behaviors in vitro and in vivo

Abstract

In the present study, surface functional groups of titanium surfaces gone through different treatments, including acid etched treatment (AE), nitric acid treatment (NT), heat treatment (HT), and alkali treatment (AT), and their behaviors in vitro and in vivo was thoroughly studied by spectroscopic analysis. In vitro and in vivo results revealed that the rank of bioactivity of various surfaces was AE < NT < HT < AT. XPS analysis indicated that AT greatly increased the OH group concentration on the titanium surface whereas HT reduced the OH group concentration. Thus, OH group difference could not be a good explanation of bioactivity difference. On the other hand, ToF-SIMS analysis demonstrated the TiOH þ /Ti þ ratios of various surfaces correlated well with the bioactivity and the surface energies, which implied that Ti-OH could play an important role in the bioactivity. This detail investigation of the relationship between surface functional groups and surface bioactivity could help us to broaden the knowledge about the mechanism of bioactivity and to design next generation bioactive materials.2007 Wiley Periodicals, Inc. J Biomed Mater Res 84A: [523][524][525][526][527][528][529][530][531][532][533][534] 2008

Positively charged bioactive Ti metal prepared by simple chemical and heat treatments

“…Lu et al (2007) reported that Ti metal that was treated with strong nitric acid for a long period induced the formation of apatite on its surface in an SBF, although no titanium oxide was detected on its surface. Lu et al (2008) reported that acid-etched Ti metal which formed rutile on its surface by a heat treatment induced the formation of apatite on its surface in an SBF. Pattanayak et al (2009) reported that the apatite-forming ability of Ti metal with rutile and anatase on its surface after soaking in NaOH and HCl solutions, and then a heat treatment, increased with increasing concentration of the HCl solution.…”

Collagen nanofilm immobilized on at surfaces by electrodeposition method

“…XPS's surface characterization shows that following anodic oxidation, TiOx films are funconalized with À ÀPO 4 , À ÀSO 4 and À ÀOH groups. These functional groups should be (SO 4 ) 2 and H 2 (PO 4 ) 3 or HOPO 4 . 29 Compared to CT surface, chemical compositions of EAT is not clearly different.…”

Análisis químico y topográfico de la superficie de implantes dentales

“…Este mismo resultado fue reportado en otros estudios. 15,16 Fueron identificados además elementos como aluminio (Al), azufre (S), plomo (Pb), fósforo (P), calcio (Ca), sodio (Na) y nitrógeno (N), también identificados en estudios previos. 17 La presencia de contaminantes en las superficies depende en gran medida de las condiciones de fabricación, mecanizado, temperatura, exposición al aire, lubricantes, esterilización, almacenamiento, embalaje y manipulación de los implantes.…”