|
KMID : 0362719960340050363
|
|
Journal of the Korean Dental Association
1996 Volume.34 No. 5 p.363 ~ p.384
|
|
|
A Comparison of Canal Preparation with Engine-Driven Nickel-Titanium Files, Ultrasonic Files, and Stainless Steel Files
|
|
|
|
|
Abstract
|
|
|
The purpose of this study is to compare the canal preparation with engine-driven Nickel-Titanium instruments(.04 tapered Profile), ultrasonic instruments, and stainless steel hand instruments in a simulated curved canal. 45 resin blocks of 30
degree
curvature were instrumented by using each of the three file types. Before and after preparation, a record of each block was taken with the Storz surgical microscope at 5 and 20 times magnification. Ledges, elbows, zips, and apical transportations
were
observed. Comparisons were made between the preoperative and postoperative shapes and curvatures of each root canal.
@ES The results were as follows:
@EN 1. Profiles were significantly less likely to change the original canal curvature when instrumenting curved root canals. Step-back technique with stainless steel files reduced the canal curvature and ultrasonic files increased the canal
curvature(P<0.001).
2. Profiles showed the least amount of increase change in total area of root canal after preparation that other instruments(P<0.05)
3. Ultrasonic group had the shortest preparation time, followed by Profiles, and Step-back technique with stainless steel files.
4. Incidence of non-tapered, hour-glass appearance was most with ultrasonic files, least in Profiles.
5. Profiles showed least amount of ledge formation than other instruments and no elbows/zips, apical transportations.
In our conclusion, .04 tapered profile were shown to be most effective in preparation of the curved canal among the three instruments
|
|
|
KEYWORD
|
|
|
|
|
|
FullTexts / Linksout information
|
|
|
|
|
Listed journal information
|
|
|
|