Abstract
The purpose of this study was to investigate the influence of heat treatment on the mechanical properties of Ni-Ti file materials. Ni-Ti wire (1.00 mm ø) was processed into a conical shape with 0.30-mm diameter tip and 0.06 taper. Specimens were heated for 30 min at 300, 400, 450, 500 or 600°C. Non-heated specimens were used as controls. DSC, a cantilever-bending test and cyclic fatigue test were performed. Ms and Af for groups 400 and 450 were higher than those for others (p<0.05). The load/defection ratios of groups 400, 450 and 500 were lower than that of group 600 (p<0.05). The bending load values at 2.0-mm defection of groups 400, 450 and 500 were lower than those of group 300 and the control group (p<0.05). The NCFs of groups 400, 450 and 500 exceeded that of group 600(p<0.05). Changes in flexibility with heat treatment could improve the cyclic fatigue properties of Ni-Ti instruments.
Original language | English |
---|---|
Pages (from-to) | 27-31 |
Number of pages | 5 |
Journal | Dental materials journal |
Volume | 33 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2014 |
Externally published | Yes |
Keywords
- Bending property
- Cyclic fatigue property
- Heat treatment
- Ni-Ti alloy
- Transformation behavior
ASJC Scopus subject areas
- Ceramics and Composites
- Dentistry(all)