Surface chemistry effects of topographic modification of titanium dental implant surfaces: 1. Surface analysis.
OBJECTIVE
To analyze the surface composition of 34 different commercially available titanium dental implants.


METHODS
Surface composition was evaluated by x-ray photoelectron spectroscopy (XPS). Samples were divided into 4 groups, depending on their surface topography (machined, sandblasted, acid etched, or plasma sprayed).


RESULTS
Statistical analysis of the data showed a clear relationship between surface composition and topography, which can be easily accounted for by the chemical effects of the surface treatment performed. On average, acid-etched and plasma-sprayed surfaces had higher titanium and lower carbon concentration than machined surfaces.


CONCLUSIONS
Current studies aimed at the evaluation of implants with different topography should not implicitly assume that topography is the only variable controlling the biologic response. Rather, when comparing different topographies, it should be taken into account that surface chemistry may be a variable as well.
Morra
Marco
M
Nobil Bio Ricerche, Villafranca d'Asti, Italy. mmorra@tin.it
Cassinelli
Clara
C
Bruzzone
Giuseppe
G
Carpi
Angelo
A
Di Santi
Giuseppe
G
Giardino
Roberto
R
Fini
Milena
M
D000134:Acid Etching, Dental; D000327:Adsorption; D000704:Analysis of Variance; D002244:Carbon / Q000032:analysis / Q000737:chemistry; D020099:Coated Materials, Biocompatible / Q000737:chemistry; D016001:Confidence Intervals; D015921:Dental Implants; D003764:Dental Materials / Q000032:analysis / Q000737:chemistry*; D017267:Dental Prosthesis Design; D004577:Electron Probe Microanalysis; D006801:Humans; D008422:Materials Testing; D008669:Metallurgy; D012822:Silicon Dioxide / Q000737:chemistry; D013499:Surface Properties; D014025:Titanium / Q000032:analysis / Q000737:chemistry*
D020099:Coated Materials, Biocompatible; D015921:Dental Implants; D003764:Dental Materials; D002244:Carbon; D012822:Silicon Dioxide; D014025:Titanium