Comparison of single cone obturation performance of different novel nickel-titanium rotary systems.
OBJECTIVE
The purpose of this study was to compare several different single-cone obturations in the gutta-percha-ﬁlled areas (PGFA), sealer-ﬁlled areas (PSFA) and voids, also determining the volumetric characteristics of the tested cones.


METHODS
Curved mesial roots of 120 mandibular molars were instrumented using several different systems (ProTaper Next, Twisted File Adaptive, OneShape, ProTaper Universal, WaveOne and Reciproc) and filled with corresponding single cones. The teeth were then sectioned horizontally at 2, 4, 6 and 8 mm from the apex. The area values of each section were calculated and converted to percentages (PGFA, PSFA and voids) of the total area. To determine volumetric characteristics of the tested cones, 20 gutta-percha points of each tested group were scanned with CBCT using the same parameters.


RESULTS
The ProTaper Next and WaveOne groups presented the most PGFA and least PSFA. The Twisted File Adaptive group presented the least PGFA and most PSFA (p < 0.05) and the least gutta-percha volume.


CONCLUSIONS
The Twisted File Adaptive system matched cones had the least volume and the least PGFA in severely curved mesiobuccal canals of mandibular ﬁrst molars. Single matched cones volume varied.
Department of Endodontics, Faculty of Dentistry, İzmir Katip Çelebi University , İzmir , Turkey.
Ismail Davut
ID
Capar
Hüseyin
H
Ertas
Evren
E
Ok
Hakan
H
Arslan
D054893:Cone-Beam Computed Tomography / Q000379:methods; D003722:Dental Alloys / Q000737:chemistry*; D003786:Dental Pulp Cavity / Q000033:anatomy & histology / Q000000981:diagnostic imaging; D004853:Epoxy Resins / Q000737:chemistry / Q000627:therapeutic use; D004867:Equipment Design; D006171:Gutta-Percha / Q000737:chemistry / Q000627:therapeutic use; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D008422:Materials Testing; D008963:Molar / Q000033:anatomy & histology / Q000000981:diagnostic imaging; D009532:Nickel / Q000737:chemistry*; D010781:Photography / Q000379:methods; D012387:Root Canal Filling Materials / Q000737:chemistry / Q000627:therapeutic use*; D012389:Root Canal Obturation / Q000379:methods*; D018915:Root Canal Preparation / Q000295:instrumentation*; D012399:Rotation; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*; D019227:Tooth Apex / Q000033:anatomy & histology / Q000000981:diagnostic imaging; D014092:Tooth Root / Q000033:anatomy & histology / Q000000981:diagnostic imaging
D003722:Dental Alloys; D004853:Epoxy Resins; D012387:Root Canal Filling Materials; C534916:epoxy resin-based root canal sealer; C040654:titanium nickelide; D009532:Nickel; D006171:Gutta-Percha; D014025:Titanium
CBCT; ProTaper Next; Twisted File Adaptive; gutta-percha filled area; single-cone obturation