title: The incidence of dentinal cracks during root canal preparations with reciprocating single-file and rotary-file systems: A meta-analysis.
abstract: As a dangerous factor in vertical root fracture, dentinal crack formation is often associated with root canal instruments. We conducted this meta-analysis to compare the influence of two types of nickel titanium (NiTi) instruments that have different movements (reciprocating single-file versus full-sequence rotary file systems) on dentinal cracks formation during root canal preparation. Searches were conducted in PubMed, ISI Web of Knowledge, Embase and Cochrane Library using a combination of keywords. Titles and abstracts of all articles were independently assessed by two reviewers in accordance with the predefined inclusion criteria. Relevant studies were acquired in full-text form. Data in these articles were independently extracted. A meta-analysis was conducted using Review Manager 5.3. The results showed that the WaveOne and Reciproc files with a reciprocating motion produced significantly fewer dentinal cracks than the conventional rotational ProTaper technique.
authors.affiliation: Department of Stomatology, the First Affiliated Hospital of Chongqing Medical University.|Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences.|Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education.
authors.forename: Xi
authors.initials: X
authors.lastname: Wei
authors.affiliation: Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences.|Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education.|College of Stomatology, Chongqing Medical University.
authors.forename: Bo
authors.initials: B
authors.lastname: Hu
authors.affiliation: Department of Stomatology, the First Affiliated Hospital of Chongqing Medical University.|Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences.|Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education.
authors.forename: Haiyang
authors.initials: H
authors.lastname: Peng
authors.affiliation: Department of Stomatology, the First Affiliated Hospital of Chongqing Medical University.|Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences.|Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education.
authors.forename: Ming
authors.initials: M
authors.lastname: Tang
authors.affiliation: Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences.|Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education.|College of Stomatology, Chongqing Medical University.
authors.forename: Jinlin
authors.initials: J
authors.lastname: Song
mesh_terms: D003804:Dentin; D006801:Humans; D015994:Incidence; D018915:Root Canal Preparation; D014082:Tooth Fractures; D014092:Tooth Root
keywords: Dentinal cracks; NiTi instruments; Reciprocating single-file systems; Root canal preparations; Rotary-file systems