Browsing by Autor "Mily Gabatel Pacheco"

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    Efectos del envejecimiento de la resistencia adhesiva microtensil de tres sistemas adhesivos
    (2021) Mily Gabatel Pacheco; J D Víctor Setién
    Adhesive systems are the retention mechanism of composite resins and their performance over time will depend on the success of the restoration. A study was conducted to determine the microtensile adhesive strength of three total etch adhesives: AdperTM Single Bond 2, One Coat Bond SL and Prime-Dent Bonding Resin. Thirty-six molars were selected and randomly divided into 3 groups according to the adhesive system, each of these groups was further divided into 2 subgroups after aging in two humidity conditions: 100% humidity (H) and submerged in water (S). The occlusal enamel was removed to apply the adhesives under study on dentin, and a resin block was built on that surface, then the restored molars were sectioned to obtain 1mm2 sticks and subjected to aging for 98 days. Then a microtensile force was applied to each bar until the moment of adhesive failure was reached. A statistical analysis was performed by univariate ANOVA, and Tukey’s DSH (p <0.05), obtaining an average total adhesive strength of 14.5628 MPa for the 100% humidity groups, higher than for those submerged in water with 12.7267 MPa, being the AdperTM Single Bond 2 adhesive (H=19.2440±11.67 MPa / S=16, 6120±16.21 MPa) obtained the highest microtensile adhesive strength, followed by One Coat Bond SL (H=15.0925±7.17 MPa / S=12.6980±10.35 MPa) and finally Prime-Dent Bonding Resin (H=9.3520±6.64 MPa / S=8.8700±7.62 MPa). It is concluded that hydrolytic degradation due to aging influenced the adhesives studied by decreasing their adhesive strength.