Method Article
CBCT Evaluation of Canal Transportation & Centering Ability of E-Flex Gold, Versus ProTaper Next and XP-Endo Shaper Rotary NiTi files in Preparing Curved Root Canals: A randomized in vitro study
https://doi.org/10.21203/rs.3.pex-2407/v1
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This study aims to compare:
1. The Canal Transportation of E-Flex Gold (full sequence system), ProTaper Next (full sequence system), and XP-Endo Shaper (Single file System) in curved canals in three levels (apical, middle, and coronal).
2. The Centering Ability of E-Flex Gold (full sequence system), ProTaper Next (full sequence system), and XP-Endo Shaper (Single file System) in curved canals in three levels (apical, middle, and coronal).
24 human mandibular molar teeth, extracted for clinical reasons such as periodontal disease or extensive caries, will be collected.
Eligibility criteria of the collected teeth:
1) Mandibular molars with two separate mesial canals orifices and separate apical foramina.
2) Mesial canals are curved, with the angle of curvature ranging between 20-35 degrees (according to Schneider’s method).
3) Teeth with complete formation of apices & apical foramina (Mature root apices).
4) No extensive root caries.
5) No calcifications in the root canals.
6) No internal or external resorption of the roots.
Storage: Teeth will be cleaned & stored in 0.9% saline solution (Egypt Otsuka Pharmaceutical Co., S.A.E) till use.
Preparation of Samples:
▪ The crowns were removed using a water-cooled safe sided diamond disc leaving 3 mm above the cemento-enamel junction.
▪ The distal root of each tooth will be resected at the level of the furcation using a stainless-steel disk (Isomet R 4000 Unear Precision Saw, Buehler, England) under coolant
▪ A #10 K-File (Thomas Inc., France) will be inserted in the mesial canals to check patency. Only patent canals will be included in the study.
▪ A #15 K-file must be reaching & fitting to the full working length.
Grouping of Samples:
24 teeth will be selected according to the previously mentioned eligibility Criteria.
Teeth will then be divided into three groups (8 teeth each) according to the type of instrument used in the Root Canal Preparation (E-Flex Gold, ProTaper Next, or XP-Endo Shaper endodontic files).
Pre-instrumentation imaging:
Each mould will be scanned using Cone Beam Computed Tomography
Instrumentation:
Mesiobuccal canals of all teeth will be checked by #10 K-file for patency and irrigated with 2.5% sodium hypochlorite solution (Clorox, Egyptian company for house detergents, 10th of Ramadan, A.R.E) before instrumentation
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This protocol has been posted on Protocol Exchange, an open repository of community-contributed protocols sponsored by Nature Portfolio. These protocols are posted directly on the Protocol Exchange by authors and are made freely available to the scientific community for use and comment.
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