A finite element study on the mechanical behavior of reciprocating endodontic files
Braz. j. oral sci
;
14(1): 52-59, Jan-Mar/2015. tab, graf
Article
in English
| LILACS
| ID: lil-745784
ABSTRACT
To evaluate the mechanical behavior of reciprocating endodontic files, comparing nickel-titanium NiTi and stainless steel 316L St.St. 316L as manufacturing material for such instruments. METHODS: A three-dimensional finite element model was designed for this study. The simplified instrument model geometry was created on commercial CAD/CAM software. Real strain stress curves of St.St. 316L and NiTi were used in the analysis. Non-linear static analysis was performed to simulate the instrument inside root canal at an angle of 45° in the apical portion, and subjected to torsion of 0.3 N.cm. RESULTS: Non-linear NiTi material showed super elasticity and high functionality in such applications. Very high levels of stress appeared in the file at 3 mm from the tip close to yield point. CONCLUSIONS: St. St. 316L is not suitable for manufacturing reciprocating instruments. Modeling of the instrument with equivalent circular cross-sectional area did not affect results quality. Reciprocating instruments have short lifespan, thus manufacturers recommend using one file per tooth. Reciprocating instruments are recommended for less experienced dentist...
Full text:
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Index:
LILACS (Americas)
Main subject:
Stainless Steel
/
Titanium
/
Endodontics
/
Nickel
Limits:
Humans
Language:
English
Journal:
Braz. j. oral sci
Journal subject:
Dentistry
Year:
2015
Type:
Article
Affiliation country:
Egypt
Institution/Affiliation country:
National Research Centre/EG
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