PURPOSE: Achieving optimal moisture inside the root canal is a challenge during bonding of fiberglass posts. This study evaluated the effect of different moisture patterns on the push-out bond strength (PBS) and nanoleakage (NL) of fiber posts bonded to the root canal of two simplified etch-and-rinse adhesives. MATERIALS AND METHODS: The roots of 72 human premolars were endodontically prepared and divided into 6 groups according to the combination of the main factors: adhesive (Ambar and Adper Single Bond 2) and moisture (dry, wet, and overwet). The posts were cemented and after 1 week, the roots were cross sectioned into 6 disks. Two disks each were obtained from the cervical, middle, and apical thirds, and the PBS test was carried out (0.5 mm/min; n = 8). The NL was evaluated by scanning electron microscopy after the immersion of specimens in 50% silver nitrate (n = 4). The failure pattern was examined on all debonded specimens. Data were analyzed by three-way repeated measures ANOVA and Tukey's test (5%). RESULTS: For both adhesives, higher PBS values and lower NL were observed in the wet groups, and lower PBS and higher NL in the dry group. In general, the overwet condition showed intermediate results. CONCLUSIONS: The root dentin walls should be left slightly moist before performing fiber post cementation procedures.
PURPOSE: Achieving optimal moisture inside the root canal is a challenge during bonding of fiberglass posts. This study evaluated the effect of different moisture patterns on the push-out bond strength (PBS) and nanoleakage (NL) of fiber posts bonded to the root canal of two simplified etch-and-rinse adhesives. MATERIALS AND METHODS: The roots of 72 human premolars were endodontically prepared and divided into 6 groups according to the combination of the main factors: adhesive (Ambar and Adper Single Bond 2) and moisture (dry, wet, and overwet). The posts were cemented and after 1 week, the roots were cross sectioned into 6 disks. Two disks each were obtained from the cervical, middle, and apical thirds, and the PBS test was carried out (0.5 mm/min; n = 8). The NL was evaluated by scanning electron microscopy after the immersion of specimens in 50% silver nitrate (n = 4). The failure pattern was examined on all debonded specimens. Data were analyzed by three-way repeated measures ANOVA and Tukey's test (5%). RESULTS: For both adhesives, higher PBS values and lower NL were observed in the wet groups, and lower PBS and higher NL in the dry group. In general, the overwet condition showed intermediate results. CONCLUSIONS: The root dentin walls should be left slightly moist before performing fiber post cementation procedures.
Authors: Maria Fernanda Costa Scholz; Rossana Aboud Matos de Almeida; Nelson Scholz; Giovana M Gomes; María José Masson-P; Alessandro D Loguercio; Alessandra Reis; Matheus C Bandéca Journal: Clin Cosmet Investig Dent Date: 2020-02-26
Authors: Alexandru Dan Popescu; Dragoș Laurențiu Popa; Andreea Gabriela Nicola; Ionela Teodora Dascălu; Cristian Petcu; Tiberiu Tircă; Mihaela Jana Tuculina; Horia Mocanu; Adela Nicoleta Staicu; Lelia Mihaela Gheorghiță Journal: Int J Environ Res Public Health Date: 2022-07-22 Impact factor: 4.614
Authors: Lucas Ruiz; Giovana Mongruel Gomes; Bruna Bittencourt; Fabrício Rutz da Silva; Osnara Maria Mongruel Gomes; Julio Cezar Chidoski Filho; Abraham Lincoln Calixto Journal: Iran Endod J Date: 2018