Abstract
This study investigated the effect of blood-contamination on the push-out bond strength of BiodentineTM (BD) and MTA Angelus® (MTA-A) to root dentin over time. Twenty-five teeth were sectioned horizontally to obtain 120 root slices. The lumens were filled with MTA-A or BD: 60 for each cement (30 uncontaminated and 30 blood contaminated). Push out bond strength to dentin was assessed at 24 h (n=10), 7 days (n=10) and 28 days (n=10). Failure modes were classified as: cohesive, adhesive or mixed failure. Two-way ANOVA was used to investigate the interaction between blood contamination vs. hydration period. Mann Whitney test compared different materials in each period, and it also compared the contaminated versus uncontaminated material for each period. Friedman, followed by Dunn`s test, compared periods of hydration for each material, regardless of blood contamination. Failure modes were reported descriptively. The interaction hydration period vs. blood contamination was highly significant for MTA-A (P=0.001) and it was not significant for BD (P=0.474). There were no differences between bond strength of uncontaminated and contaminated BD in any of the periods. Bond strength of uncontaminated MTA-A increased at each time of hydration; but it remained stable over time for blood-contaminated samples. BD had higher bond strength than MTA-A in all periods of hydration. Cohesive failure predominated. Only for MTA-A, the over time bond strength to dentin was affected by blood contamination.
Highlights
It is of vital importance that calcium silicate cements resist dislodgment to guarantee the predictability and success of a dental treatment
Considering the clinical relevance of avoiding cement dislocation when it is used adjacent to blood, and the considerable importance to predict the results of the dental treatment over time, the purpose of this in vitro study was: to investigate the effect of blood-contamination on the bond strength of BiodentineTM (BD; Septodont, Saint Maur des Fossés, France) and MTA Angelus® (MTA-A; Angelus Dental Industry Products S/A) to root dentin at three different moments after hydration (24 h, 7 days and 28 days), through push-out bond strength tests observing its failure mode
Discussion strength of the blood contaminated MTA-A remained stable over time, it indicates that the hydration process
Summary
It is of vital importance that calcium silicate cements resist dislodgment to guarantee the predictability and success of a dental treatment. There is little information regarding the over time effects of blood contamination on the bond strength to dentin using contemporary calcium silicate cements, such as BiodentineTM.and MTA Angelus [8]. Considering the clinical relevance of avoiding cement dislocation when it is used adjacent to blood, and the considerable importance to predict the results of the dental treatment over time, the purpose of this in vitro study was: to investigate the effect of blood-contamination on the bond strength of BiodentineTM (BD; Septodont, Saint Maur des Fossés, France) and MTA Angelus® (MTA-A; Angelus Dental Industry Products S/A) to root dentin at three different moments after hydration (24 h, 7 days and 28 days), through push-out bond strength tests observing its failure mode (adhesive, cohesive or mixed). It was expected that the interaction hydration period vs. blood-contamination would not be significant for the push-out bond strength values between the contaminated and uncontaminated cements
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