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These alterations may also affect the adhesion and sealing ability of sealers to the treated dentin surfaces.
The comparison between calcium hydroxide pastes and their vehicles may evidence if the effect is due to the mixture or particularly to the vehicle itself.
The selection of teeth was made on the basis of their similarity in size and morphology and absence of any cracks or defects.
Debris, calculus, and soft tissue remnants on the root surfaces were cleaned using a Gracey curette (Hu-Friedy, California, USA).
The values obtained depend on several factors, such as Young`s modulus of the material, yield stress in compression, and anisotropy, amongst others.
The visualization of the indentation mark allows the measurement of its diagonals and thus, the determination of the Vickers hardness number (VHN).
The vehicles are: Distilled water, chlorhexidine, carticaine in the anesthetic solution, propylene glycol, monochlorophenol and monochlorophenol - propylene glycol.
The references Vickers microhardness were obtained prior the application of the medicaments.
Effect of calcium hydroxide pastes and vehicles on root canal dentin microhardness.
Hardness is measured as the resistance to the penetration of an indenter, which is necessarily harder than the sample to be analyzed.
A hardness test provides a numerical value that allows a distinction between materials submitted to the penetration of a specific indenter.
The canals were instrumented with the step-back technique up to a #50 master apical K-file (Dentsply Maillefer, Ballaigues, Switzerland).
The working length was determined by visualizing the tip of a size 15 K-file (Dentsply Maillefer, Ballaigues, Switzerland) extending beyond the apical foramen and subtracting 1 mm from that length of the file.
demonstrated that they reduce dentin microhardness; however, there are no studies that comparatively evaluate the influence of calcium hydroxide (CH) vehicles on dentin microhardness.