TY - JOUR
T1 - Pitting Corrosion Resistance of Nickel-Titanium Rotary Instruments with Different Surface Treatments in Seventeen Percent Ethylenediaminetetraacetic Acid and Sodium Chloride Solutions
AU - Bonaccorso, Antonio
AU - Tripi, Teresa Roberta
AU - Rondelli, Gianni
AU - Condorelli, Guglielmo Guido
AU - Cantatore, Giuseppe
AU - Schäfer, Edgar
PY - 2008/2
Y1 - 2008/2
N2 - This study evaluated the pitting corrosion resistance of nickel-titanium (NiTi) rotary instruments with different surface treatments in 17% ethylenediaminetetraacetic acid (EDTA) and NaCl solutions. Electropolished RaCe instruments were allocated to group A, non-electropolished RaCe instruments to group B, and physical vapor deposition (PVD)-coated Alpha files to group C (10 instruments per group). Electrochemical measurements were carried out by using a potentiostat for galvanic current measurements. On the basis of electrochemical tests, no localized corrosion problems are to be expected in EDTA. In NaCl, pitting potential occurred at higher values for the electropolished and PVD instruments, indicating an increased corrosion resistance. There appears to be a risk of corrosion for NiTi instruments without surface treatments in contact with NaCl. NiTi files with PVD and electropolishing surface treatments showed an increase corrosion resistance.
AB - This study evaluated the pitting corrosion resistance of nickel-titanium (NiTi) rotary instruments with different surface treatments in 17% ethylenediaminetetraacetic acid (EDTA) and NaCl solutions. Electropolished RaCe instruments were allocated to group A, non-electropolished RaCe instruments to group B, and physical vapor deposition (PVD)-coated Alpha files to group C (10 instruments per group). Electrochemical measurements were carried out by using a potentiostat for galvanic current measurements. On the basis of electrochemical tests, no localized corrosion problems are to be expected in EDTA. In NaCl, pitting potential occurred at higher values for the electropolished and PVD instruments, indicating an increased corrosion resistance. There appears to be a risk of corrosion for NiTi instruments without surface treatments in contact with NaCl. NiTi files with PVD and electropolishing surface treatments showed an increase corrosion resistance.
KW - Endodontic files
KW - irrigating solutions
KW - localized corrosion
KW - Ni-Ti alloy
KW - surface treatments
UR - http://www.scopus.com/inward/record.url?scp=38149069560&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=38149069560&partnerID=8YFLogxK
U2 - 10.1016/j.joen.2007.11.012
DO - 10.1016/j.joen.2007.11.012
M3 - Article
C2 - 18215684
AN - SCOPUS:38149069560
VL - 34
SP - 208
EP - 211
JO - Journal of Endodontics
JF - Journal of Endodontics
SN - 0099-2399
IS - 2
ER -