Beta
79233

Topographic Changes Of Two different Ni Ti File Systems After Multiple Uses

Article

Last updated: 23 Dec 2024

Subjects

-

Tags

-

Abstract

Aim: To study the topographic changes of protaper Next and Two Shape NiTi file systems after
three uses.
Materials and Methods: Four sets of Protaper Next and four sets of Two Shape files were
used to prepare MB canals of mandibular first molars. Twenty four mandibular first molars with
nearly similar lengths (20 to 22 mm) and the mesiobuccal canals with curvature ranged from 20o -
40o were used. All teeth were subjected to access cavity, MB canal localization, WL determination
and the teeth were randomly assigned to two groups, twelve for each according to the type of NiTi
rotary files used. Group I, twelve MB canals were prepared by using the four sets of Protaper Next
NiTi rotary files. Group II, twelve MB canals were prepared by using the four sets of Two Shape
NiTi rotary files. Every set prepare three canals. All sets of Protaper Next including X1 & X2 and
Two Shape including TS1 & TS2 were scanned under SEM before and after canal preparation in
the same position at three parts: apical part, middle part and the critical point (3-5 mm from the file
tip) and photographed. No visible defects, pitting, corrosion, fretting, micro cracks, fractures, metal
strips, spiral distortion, blunt cutting edges, disruption of cutting edges or fatigue cracks were the
criteria of surface deformations of files. All deformations were tabulated and compared before and
after root canal preparation.
Results: PTN sets: one X1 showed disruption of cutting edges before and after use, one X1
showed disruption of cutting edges after use, two X1 and four X2 files showed no visible defects.
TS sets: one TS1 showed disruption of cutting edges before and after use, three TS1 showed no
visible defects. One TS2 showed pitting before and after use, one TS2 showed corrosion after use,
one TS2 showed disruption of cutting edges and micro cracks after use and one TS2 showed no
visible defects.
Conclusion: Based on the results of this study, it is safe to instrument up to three curved canals
by PTN or TS rotary NiTi files without file fracture.
 

DOI

10.21608/edj.2018.79233

Keywords

Protaper Next file, Two Shape file, Topographic changes, Multiple use

Authors

First Name

Soliman

Last Name

Kamha

MiddleName

M.

Affiliation

Lecturer of Endodontics, Faculty of Dentistry, Pharos University In Alexandria

Email

-

City

-

Orcid

-

Volume

64

Article Issue

Issue 4 - October (Fixed Prosthodontics, Dental Materials, Conservative Dentistry & Endodontics)

Related Issue

11458

Issue Date

2018-10-01

Receive Date

2020-03-26

Publish Date

2018-10-01

Page Start

3,683

Page End

3,696

Print ISSN

0070-9484

Online ISSN

2090-2360

Link

https://edj.journals.ekb.eg/article_79233.html

Detail API

https://edj.journals.ekb.eg/service?article_code=79233

Order

16

Type

Original Article

Type Code

254

Publication Type

Journal

Publication Title

Egyptian Dental Journal

Publication Link

https://edj.journals.ekb.eg/

MainTitle

Topographic Changes Of Two different Ni Ti File Systems After Multiple Uses

Details

Type

Article

Created At

22 Jan 2023