PMID- 32566899
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20220415
IS  - 2548-0839 (Electronic)
IS  - 2548-0839 (Linking)
VI  - 1
IP  - 1
DP  - 2016
TI  - Nominal Size and Taper Analysis of Novel Metallurgy NiTi Files.
PG  - 1-4
LID - 10.5152/eej.2016.16014 [doi]
AB  - OBJECTIVE: The aim of this investigation was to assess the nominal tip diameter, 
      taper and true pilot tip length of three nickel-titanium (NiTi) rotary files 
      before and after use. METHODS: Three brands of NiTi files of size 25.08 were 
      evaluated: ProTaper Uni-versal (Dentsply Tulsa Specialties, Tulsa, USA), Channels 
      PT (Insight Endo for Henry Schein, Melville, NY) and ProTaper Gold (Dentsply 
      Tulsa Specialties), with ten files from each brand (total n=30). Scanning 
      electron microscope (SEM) images of the files at 50x magnification were acquired 
      before and after the files were used on endodontic training blocks, and the 
      images were analysed by two independent investigators using ImageJ software. The 
      nominal tip diameter (D0), taper and true pilot tip length (measured as the 
      distance from the advertised diameter size of the file to the tip of the file) 
      were recorded for each file and were analysed for statistical differences using 
      repeated measures of analysis of variance (r-ANOVA) and Tukey's post-hoc test 
      (P<0.05). RESULTS: The marginal means of the nominal size showed statistically 
      significant differences between brands of the same size; statistically 
      significant differences were also observed between the advertised sizes and the 
      actual sizes (P<0.001). The mean taper values showed statistically significant 
      differences from the advertised (p<0.001) sizes, except for the ProTaper Gold 
      (P=0.023) group. The changes in the true pilot tip length before and after use 
      were not statistically significant (P>0.05). The pilot tip lengths varied between 
      brands. CONCLUSION: All nominal tip diameters and most taper sizes of the 
      analysed brands show statistically significant differences from the nominal sizes 
      advertised by the manufacturers. The differences in true pilot tip lengths 
      between brands indicate a current lack of standardization.
CI  - Copyright: (c) 2016 European Endodontic Journal.
FAU - Islambasic, Melita
AU  - Islambasic M
AD  - Department of Endodontics, University of North Carolina at Chapel Hill, Chapel 
      Hill, US.
FAU - Coelho, Marcelo Santos
AU  - Coelho MS
AD  - Department of Endodontics, University of North Carolina at Chapel Hill, Chapel 
      Hill, US.
FAU - Pettiette, Mary T
AU  - Pettiette MT
AD  - Department of Endodontics, University of North Carolina at Chapel Hill, Chapel 
      Hill, US.
FAU - Tawil, Peter Z
AU  - Tawil PZ
AD  - Department of Endodontics, University of North Carolina at Chapel Hill, Chapel 
      Hill, US.
LA  - eng
PT  - Journal Article
DEP - 20161207
PL  - Turkey
TA  - Eur Endod J
JT  - European endodontic journal
JID - 101717480
PMC - PMC7299056
OTO - NOTNLM
OT  - Accuracy
OT  - NiTi rotary files
OT  - nominal size
OT  - pilot tip
OT  - taper
COIS- Conflict of interest: No conflict of interest was declared by the authors.
EDAT- 2016/12/07 00:00
MHDA- 2016/12/07 00:01
PMCR- 2016/12/07
CRDT- 2020/06/23 06:00
PHST- 2016/06/01 00:00 [received]
PHST- 2016/07/15 00:00 [revised]
PHST- 2016/10/12 00:00 [revised]
PHST- 2016/10/27 00:00 [accepted]
PHST- 2020/06/23 06:00 [entrez]
PHST- 2016/12/07 00:00 [pubmed]
PHST- 2016/12/07 00:01 [medline]
PHST- 2016/12/07 00:00 [pmc-release]
AID - EEJ-1-5 [pii]
AID - 10.5152/eej.2016.16014 [doi]
PST - epublish
SO  - Eur Endod J. 2016 Dec 7;1(1):1-4. doi: 10.5152/eej.2016.16014. eCollection 2016.