Home > Journals > Minerva Stomatologica > Past Issues > Minerva Stomatologica 2009 May;58(5) > Minerva Stomatologica 2009 May;58(5):225-31

CURRENT ISSUE
 

ARTICLE TOOLS

Reprints

MINERVA STOMATOLOGICA

A Journal on Dentistry and Maxillofacial Surgery


Official Journal of the Italian Society of Odontostomatology and Maxillofacial Surgery
Indexed/Abstracted in: CAB, EMBASE, Index to Dental Literature, PubMed/MEDLINE, Scopus, Emerging Sources Citation Index


eTOC

 

ORIGINAL ARTICLES  


Minerva Stomatologica 2009 May;58(5):225-31

language: English

The corrosive effects of sodium hypochlorite on nickel-titanium endodontic instruments: assessment by digital scanning microscope

Cavalleri G., Cantatore G., Costa A., Grillenzoni M., Comin Chiaramonti L., Gerosa R.

Department of Dental Sciences University of Verona, Verona, Italy


PDF  


Aim. Prolonged contact (several hours) of nickel-titanium (NiTi) endodontic instruments with sodium hypochlorite has a considerable corrosive effect which reduces the instruments’ resistance to fractures. The aim of this study was to verify whether short-term contact (several minutes, as is the case in clinical practice) produces the same effects.
Methods. Using a digital scanning microscope, the blade surfaces of three groups of ProTaper instruments were examined, particularly of the #1 Shaping File. The blade’s file (but not their handles) were soaked in sodium hypochlorite heated to 50 °C for three different times compatible with times in clinical practice, rather for 2, 5 and 10 minutes; the files were then compared with a control group.
Results. The micro-photographs did not reveal any appreciable signs of corrosion on the file blades.
Conclusion. It is evident, therefore, that using sodium hypochlorite as an irrigating solution in root canals, where it comes into contact with NiTi rotary endodontic instruments, does not alter the surface structure of the files through corrosion. Thus it is possible to conclude that, considering the length of time used in clinical practice, sodium hypochlorite does not cause any increase of risk of fracture to Ni-Ti rotary instruments.

top of page

Publication History

Cite this article as

Corresponding author e-mail