Abstract
The purpose of this study was to compare the shaping effects of three nickel-titanium rotary instruments, ProTaper, K3, and RaCe, with emphasis on canal transportation. Simulated canals with an S-shaped curvature in clear resin blocks were prepared with a torque-control, low-speed engine. Canals were prepared using the crown-down technique to the size of #30. Canal aberrations were assessed by comparing the pre- and postinstrumentation images under a stereomicroscope. ProTaper instruments caused greater widening of canals compared to K3 or RaCe. Furthermore, ProTaper files showed a tendency to ledge or zip formation at the end-point of preparation. These canal aberrations may be caused by ProTaper finishing files, which appear to be less flexible than other files of the same tip-size, because of their greater taper-size. These results suggest that nickel-titanium file systems including less tapered, more flexible instruments, like K3 and RaCe should be used in the apical preparation of canals with a complicated curvature.
| Original language | English |
|---|---|
| Pages (from-to) | 373-375 |
| Number of pages | 3 |
| Journal | Journal of Endodontics |
| Volume | 31 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - May 2005 |
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All Science Journal Classification (ASJC) codes
- Dentistry(all)
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The shaping effects of three nickel-titanium rotary instruments in simulated S-shaped canals. / Yoshimine, Y.; Ono, M.; Akamine, A.
In: Journal of Endodontics, Vol. 31, No. 5, 05.2005, p. 373-375.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The shaping effects of three nickel-titanium rotary instruments in simulated S-shaped canals
AU - Yoshimine, Y.
AU - Ono, M.
AU - Akamine, A.
PY - 2005/5
Y1 - 2005/5
N2 - The purpose of this study was to compare the shaping effects of three nickel-titanium rotary instruments, ProTaper, K3, and RaCe, with emphasis on canal transportation. Simulated canals with an S-shaped curvature in clear resin blocks were prepared with a torque-control, low-speed engine. Canals were prepared using the crown-down technique to the size of #30. Canal aberrations were assessed by comparing the pre- and postinstrumentation images under a stereomicroscope. ProTaper instruments caused greater widening of canals compared to K3 or RaCe. Furthermore, ProTaper files showed a tendency to ledge or zip formation at the end-point of preparation. These canal aberrations may be caused by ProTaper finishing files, which appear to be less flexible than other files of the same tip-size, because of their greater taper-size. These results suggest that nickel-titanium file systems including less tapered, more flexible instruments, like K3 and RaCe should be used in the apical preparation of canals with a complicated curvature.
AB - The purpose of this study was to compare the shaping effects of three nickel-titanium rotary instruments, ProTaper, K3, and RaCe, with emphasis on canal transportation. Simulated canals with an S-shaped curvature in clear resin blocks were prepared with a torque-control, low-speed engine. Canals were prepared using the crown-down technique to the size of #30. Canal aberrations were assessed by comparing the pre- and postinstrumentation images under a stereomicroscope. ProTaper instruments caused greater widening of canals compared to K3 or RaCe. Furthermore, ProTaper files showed a tendency to ledge or zip formation at the end-point of preparation. These canal aberrations may be caused by ProTaper finishing files, which appear to be less flexible than other files of the same tip-size, because of their greater taper-size. These results suggest that nickel-titanium file systems including less tapered, more flexible instruments, like K3 and RaCe should be used in the apical preparation of canals with a complicated curvature.
UR - http://www.scopus.com/inward/record.url?scp=18844429460&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=18844429460&partnerID=8YFLogxK
U2 - 10.1097/01.don.0000140568.40462.43
DO - 10.1097/01.don.0000140568.40462.43
M3 - Article
C2 - 15851932
AN - SCOPUS:18844429460
VL - 31
SP - 373
EP - 375
JO - Journal of Endodontics
JF - Journal of Endodontics
SN - 0099-2399
IS - 5
ER -