Comparative evaluation of the effects of different torque settings on dentinal crack formation using single- and multi-file system: An in vitro study.
J Conserv Dent Endod
; 27(6): 603-607, 2024 Jun.
Article
de En
| MEDLINE
| ID: mdl-38989499
ABSTRACT
Context To improve efficiency, biomechanical preparation in root canal treatment is shifting from manual SS to nickel-titanium (NiTi) rotary devices. While multi-file NiTi systems entail crack and fracture issues, modern single-file systems address these concerns. Aims:
The aim of this study was to evaluate and compare the effects of different torque settings on dentinal crack formation using single-file systems (SFS) (One Curve [OC]) and multi-file systems (ProTaper Next [PTN]) at different levels of the tooth. Subjects andMethods:
The study was conducted on 45 freshly extracted human mandibular premolars divided into groups OC at minimal and maximal torque, PTN at minimal and maximal torque, and a control group. After canal preparation, teeth were horizontally sectioned at 3, 6, and 9 mm from the apex, and then examined for cracks using a stereomicroscope. Statistical Analysis Used This was analyzed using Chi-square test.Results:
PTN group Highest crack rates at the middle (55.6%) and apical (77.8%) thirds with maximum torque; OC group Highest rates at the middle (22.2%) with minimal torque and apical (11.1%) with maximum torque.Conclusions:
Maximal torque settings had more incidence of cracks compared to minimal torque settings. It can be stated that SFS (OC) produced less cracks compared to multi-file system (PTN) at both minimal and maximal torque settings.
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Langue:
En
Journal:
J Conserv Dent Endod
Année:
2024
Type de document:
Article
Pays d'affiliation:
Inde