Push-Out Bond Strength and Surface Microhardness of Calcium Silicate-Based Biomaterials: An in vitro Study.

Majeed, Abdul; AlShwaimi, Emad

Objective: This was an in vitro evaluation of push-out bond strength and surface microhardness of calcium silicate-based biomaterials in coronal and apical root dentin.Materials and Methods: Ninety sections (2 mm thick) of coronal and apical root dentin were obtained from roots of 60 extracted teeth; the canals were enlarged to a standardized cavity diameter of 1.3 mm. Sections were randomly divided into 6 groups (n = 15 per group), and cavities were filled with Biodentine™, BioAggregate, or ProRoot mineral trioxide aggregate (MTA), according to the manufacturers' instructions. Push-out bond strength values were measured using a universal testing machine under a compressive load at a speed of 1 mm/min. Samples were analyzed under a light microscope to determine the nature of bond failure. Ten samples (2 mm thick) were prepared for all the materials, and Vickers microhardness was determined using a digital hardness tester. Data were analyzed using one-way analysis of variance and Tukey-Kramer multiple comparison tests at a significance level of p Results: Biodentine (42.02; 39.35 MPa) and ProRoot MTA (21.86; 34.13 MPa) showed significantly higher bond strengths than BioAggregate (6.63; 10.09 MPa) in coronal and apical root dentin, respectively (p Conclusion: Biodentine and ProRoot MTA showed higher bond strength and microhardness compared to BioAggregate.

MICROHARDNESS; BOND strengths; CALCIUM silicates; BIOMATERIALS; SILICATE cements (Dentistry); ALUMINUM compounds; BIOMEDICAL materials; COMBINATION drug therapy; DENTAL materials; DENTISTRY; HYDROXIDES; MINERALS; OXIDES; PHYSICS; SILICATES; CALCIUM compounds; SURFACE properties

Medical Principles & Practice, 2017, Vol 26, Issue 2, p139

1011-7571

Academic Journal

10.1159/000453455