Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2020 Summer;15(3):166-172.
doi: 10.22037/iej.v15i3.26426.

Root Fracture Resistance of Maxillary Premolars Obturated with Three Root Canal Sealers after Passive Utrasonic Irrigation: An in Vitro study

Ivy Rodrigues Merçon  1 , Carlos Eduardo da Silveira Bueno  1 , Daniel Guimarães Pedro Rocha  2 , Carlos Eduardo Fontana  2 , Andressa Salles Gonçalves Pais  1 , Alexandre Sigrist De Martin  1
Affiliations

Root Fracture Resistance of Maxillary Premolars Obturated with Three Root Canal Sealers after Passive Utrasonic Irrigation: An in Vitro study

Ivy Rodrigues Merçon et al. Iran Endod J. 2020 Summer.

Abstract

Introduction: Maxillary premolars, may be more susceptible to fracture due to their anatomy; especially when there is loss of tooth structure. Therefore, it is necessary to evaluate materials and techniques that may increase fracture resistance during and post root canal treatment. This in vitro study aimed to evaluate root fracture resistance of maxillary premolars when filled with three root canal sealers as well as whether this resistance would be increased by passive ultrasonic irrigation (PUI).

Methods and materials: Sixty-four maxillary premolars with two roots were randomly divided into one negative control group (intact canals; n = 8), one positive control group (instrumented, unsealed canals; n = 8), and six experimental groups (n = 8), which were instrumented with ProTaper Next rotary system up to X2 file and subdivided according to final irrigation (with or without PUI) and type of sealer used (AH-Plus [AH], MTA Fillapex [MTA], or EndoSequence BC Sealer [ES]). The specimens were subjected to fracture strength test in a universal testing machine at a speed of 1 mm/min until fracture. The maximum force required to induce fracture was recorded (N). The Kruskal-Wallis test and DUNN test were used for analysis.

Results: The lowest force required to cause root fracture was observed in the positive control group (310.48 ± 54.08 N); this was significantly different from the other groups (P < 0.05). There was no significant difference between experimental groups obturated with the same sealer, whether with or without PUI (AH with PUI: 558.80 ± 87.12 N; AH without PUI: 508.75 ± 97.55 N; MTA with PUI: 507.27 ± 174.55 N; MTA without PUI: 516.69 ± 96.56 N; ES with PUI: 526.76 ± 143.97 N; ES without PUI: 628.40 ± 94.74 N) (P > 0.05). There was also no significant difference between the experimental groups and the negative control group (P > 0.05).

Conclusions: In this in vitro study PUI did not increase the fracture resistance of maxillary premolars, while AH Plus, MTA Fillapex, EndoSequence sealers increased fracture resistance of instrumented root canals.

Keywords: Endodontically Treated Teeth; Fracture Strength; Root Canal Obturation; Root Canal Preparation; Smear Layer.

PubMed Disclaimer

Conflict of interest statement

‘None declared’.

Figures

Figure 1
Figure 1
Distribution of control and experimental groups has been shown (AH: AH-Plus sealer, MTA: MTA Fillapex sealer, ES: EndoSequence BC Sealer, PUI: passive ultrasonic irrigation)
See this image and copyright information in PMC

Similar articles

See all similar articles

Cited by

References

    1. Jafari Navimipour E, Ebrahimi Chaharom ME, Alizadeh Oskoee P, Mohammadi N, Bahari M, Firouzmandi M. Fracture resistance of endodontically-treated maxillary premolars restored with composite resin along with glass fiber insertion in different positions. J Dent Res Dent Clin Dent Prospects. 2012;6(4):125–30. - PMC - PubMed
    1. Mohammadi N, Kahnamoii MA, Yeganeh PK, Navimipour EJ. Effect of fiber post and cusp coverage on fracture resistance of endodontically treated maxillary premolars directly restored with composite resin. J Endod. 2009;35(10):1428–32. - PubMed
    1. Cohen S, Berman LH, Blanco L, Bakland L, Kim JS. A demographic analysis of vertical root fractures. J Endod. 2006;32(12):1160–3. - PubMed
    1. Topcuoglu HS, Tuncay O, Karatas E, Arslan H, Yeter K. In vitro fracture resistance of roots obturated with epoxy resin-based, mineral trioxide aggregate-based, and bioceramic root canal sealers. J Endod. 2013;39(12):1630–3. - PubMed
    1. Saber Sel D, Hashem AA. Efficacy of different final irrigation activation techniques on smear layer removal. J Endod. 2011;37(9):1272–5. - PubMed

LinkOut - more resources