✍ Scribed by G. Mabilleau; S. Bourdon; M.L. Joly-Guillou; R. Filmon; M.F. Baslé; D. Chappard
No coin nor oath required. For personal study only.
Titanium is widely used in dental implantology and orthopaedics due to its excellent corrosion resistance and mechanical properties. However, it has been reported that Ti is sensitive to F ¡ , H 2 O 2 and lactic acid. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) were used to investigate the corrosion resistance of CP-Ti disks after 9 days immersion in diVerent test solutions, based on artiWcial saliva containing F ¡ (0.5% and 2.5%), H 2 O 2 (0.1% and 10%) and/or lactic acid. Because activated macrophages and bacteria can also release locally some of these oxidative compounds, we investigated the role of these cells when plated onto titanium disks. The surface roughness (R a ) was highly increased when titanium disks were immersed in artiWcial saliva containing F ¡ , H 2 O 2 and lactic acid. After 21 days of cell culture, R a was signiWcantly increased on disks incubated with activated-J774.2 cells or Streptococcus mitis. AFM appeared to be more sensitive than SEM in evaluating the corrosion of the titanium. Chemical species, either environmental or those released by macrophages and bacteria, can provoke a marked attack of the titanium surface.
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## Abstract To analyze titanium's response to representative surgical wound environments, a study was conducted on commercially pure titanium (CPTi) and titanium, 6‐aluminum, 4‐vanadium (Ti‐6Al‐4V) exposed to phosphate‐buffered saline (PBS) with 30 m__M__ of hydrogen peroxide (H~2~O~2~) added. The