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Submitted: 08 Dec 2020
Accepted: 17 Mar 2021
ePublished: 30 Mar 2021
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Avicenna J Dent Res. 2021;13(1): 18-22.
doi: 10.34172/ajdr.2021.04
  Abstract View: 72
  PDF Download: 39

Original Article

Short-term Effect of Four Root Filling Materials on the Flexural Strength of Human Root Dentin

Hamed Karkehabadi 1 ORCID logo, Shahriar Shahriari 1, Faraz Sedaghat 1, Ebrahim Yarmohammadi 2, Hadiseh Abbaspourrokni 3,4* ORCID logo

1 Assistant Professor, Department of Endodontics, Dental School, Hamadan University of Medical Sciences, Hamadan, Iran
2 Department of Operative Dentistry, Dental School, Hamadan University of Medical Sciences, Hamadan, Iran
3 Department of Endodontics, Dental School, Hamadan University of Medical Sciences, Hamadan, Iran
4 Assistant Professor, Department of Endodontics, Faculty of Dentistry, Mazandaran University of Medical Sciences, Sari, Iran
*Correspondence to Hadiseh Abbaspourrokni, Email: drhadisehabbaspourrokni@ yahoo.com

Abstract

Background: This study aimed to assess the effects of calcium hydroxide, Biodentine, calcium-enriched mixture (CEM) cement, and mineral trioxide aggregate (MTA) on root dentin flexural strength after a 30-day exposure period.

Methods: This in vitro experimental study evaluated 25 freshly extracted sound human incisors with no caries or restorations. The apical 5 mm and the coronal two-thirds of the crowns were cut such that all samples had 10 mm length. Dentin samples (n=20 in each group) were then exposed to 2 mm thickness of calcium hydroxide, Biodentine, CEM cement, MTA, or saline (control) in petri dishes for 30 days. Finally, dentin samples were subjected to a three-point bending test after the intervention, and the flexural strength data were analyzed using one-way ANOVA, Tukey’s test, and t test.

Results: Thirty-day exposure to all four biomaterials decreased the flexural strength of root dentin (P<0.05). The four groups were significantly different in terms of the flexural strength of root dentin (P=0.001). The flexural strength of root dentin was significantly lower following exposure to calcium hydroxide (P=0.003), Biodentine (P=0.011), CEM cement (P=0.001), and MTA (P=0.007) compared to saline. The reduction in strength following exposure to calcium hydroxide was higher than that in Biodentine, CEM cement, and MTA groups (P<0.05) while the latter three were not significantly different in this respect (P>0.05).

Conclusions: In general, all four tested biomaterials decrease the dentin strength although this reduction is more prominent by calcium hydroxide.

Keywords: Root canal filling materials, Mineral trioxide aggregate, Biodentine, CEM cement, Calcium hydroxide, Dentin, Flexural strength
Citation: Karkehabadi H, Shahriari S, Sedaghat F, Yarmohammadi E, Abbaspourrokni H. Short-term Effect of four root filling materials on the flexural strength of human root dentin. Avicenna J Dent Res. 2021;13(1):18-22. doi: 10.34172/ ajdr.2021.04.
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