Research Information System
Thesis Type: Doctorate
Institution Of The Thesis: Gazi University, Sağlık Bilimleri Enstitüsü, ENDODONTİ ANA BİLİM DALI, Turkey
Approval Date: 2019
Thesis Language: Turkish
Student: ÇAĞMAN AKSOY
Supervisor: Sis Yaman
Abstract:
Aim: The aim of this study is to evaluate the root canal preparation abilities of XP-endo Shaper (XP),
Reciproc Blue (RB) and ProTaper Universal (PTU) instruments on the incidence of microcrack
formation, root canal volume change after root canal preparation and voids after root canal obturation
using micro-computed tomographic (μCT) imaging. Materials and Methods: 260 extracted human
mandibular first and second molars were scanned firstly with cone-beam CT (CBCT) and the mesial
roots with Vertucci Type IV root canal configuration and angle between 10°-20° were selected. After
the investigation, 50 teeth selected and scanned with SkyScan 1174 μCT scanner at 21μm resolution.
30 teeth that have similar root canal volume were selected and assigned to 3 experimental groups (n
= 10).The root canal preparations were done with XP, RB and PTU instrument systems. The roots
were scanned using μCT imaging before and after the root canal preparation. Then the root canal
obturation were done with each systems’ single gutta-percha cones and root canal sealer. Then the
roots were scanned using μCT imaging. NRecon software was used for the reconstruction of the
images. DataViewer software was used to evaluate the presence of dentinal microcracks. CTAn and
CTVol softwares were used to analyse the root canal volume change after preparation, presence of
voids after obturation and modelling. Results: No new dentinal microcracks were observed in the XP
and RB groups however it was observed that these systems changed some of the dentinal microcracks
into complete cracks. The PTU system significantly increased the percentage of microcracks
compared with preoperative specimens after root canal preparation (P<0.05). There was no
significant difference on the root canal volume change after root canal preparation and voids after
obturation between the groups (P> 0.05). Coclusion: XP-endo Shaper and Reciproc Blue systems did
not induce the formation of new dentinal microcracks whereas PTU system did on the mesial roots
on mandibular molars. XP-endo Shaper and Reciproc Blue systems have converted some of the
dentinal micro cracks into complete cracks. All systems showed similar results on the root canal
volume change after preparation and voids after obturation.
Key Words : XP-endo Shaper, Reciproc Blue, ProTaper Universal, root canal
preparation, root canal obturation, micro cracks, micro-computed
tomography