Chlorhexidine improves the mechanical properties of root dentin

Admin Dental Press

Edition V09N01 | Year 2019 | Editorial Original Article | Pages 27 to 42

Michael Ranniery Garcia Ribeiro, Felipe Rudá Silva Santos, Flávia Costa de Almeida, Soraia De Fátima Carvalho Souza

Objective: To evaluate the maximum flexural strength (MFS), elastic modulus (E), Knoop microhardness (KHN), and surface roughness (Ra) of root dentin treated with 2% chlorhexidine (CHX) solution. Materials and methods: Fifty bovine incisors with closed apex were selected. Thirty roots were cut into dentin bars (DB) and divided into three groups (n=10): control (no treatment), G1 (2.5% NaOCl + 17% EDTA) and G2 (2% CHX + H2O). The DB were submitted to the three-point flexural strength test to obtain the MFS and E. Twenty roots were cut longitudinally into two half-halves and placed in acrylic resin. The pulp surfaces were sanded and polished. They were rinsed according to the group (G1 or G2; n = 20 per group) and subjected to the KHN and Ra tests. SEM analysis was made. Data were analysed by one- and two-way ANOVA and Tukey post hoc test (a = 0.05). Results: The values of MFS (P < 0.05) and E (P < 0.01) were higher for G2. The KHN reduced after both endodontic irrigation treatments (P < 0.001), with no differences between them (P = 0.115). Ra was higher for G1 (P < 0.001). Conclusions: 2% CHX improved the mechanical properties of MFS, E and Ra of root dentin. Chlorhexidine, Dentin, Sodium Hypochlorite, Elastic Modulus,

Ribeiro MRG, Santos FRS, Almeida FC, Souza SFC. Chlorhexidine improves the mechanical properties of root dentin. Dental Press Endod. 2019 Jan-Apr;9(1):37-42. DOI:

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