Rached-Júnior Fuad Jacob Abi, Souza Angélica Moreira, Macedo Luciana Martins Domingues, Raucci-Neto Walter, Baratto-Filho Flares, Silva Bruno Marques, Silva-Sousa Yara Teresinha Corrêa
School of Dentistry, Universidade de Ribeirão Preto, Ribeirão Preto, SP, Brazil.
School of Dentistry, Universidade Positivo, Curitiba, PR, Brazil.
Braz Oral Res. 2016;30. doi: 10.1590/1807-3107BOR-2016.vol30.0024. Epub 2016 Feb 23.
The aim of this study was to evaluate the effects of different root canal filling techniques on the bond strength of epoxy resin-based sealers. Sixty single-rooted canines were prepared using ProTaper (F5) and divided into the following groups based on the root filling technique: Lateral Compaction (LC), Single Cone (SC), and Tagger Hybrid Technique (THT). The following subgroups (n = 10) were also created based on sealer material used: AH Plus and Sealer 26. Two-millimeter-thick slices were cut from all the root thirds and subjected to push-out test. Data (MPa) was analyzed using ANOVA and Tukey's test (α = 0.05). The push-out values were significantly affected by the sealer, filling technique, and root third (p < 0.05). AH Plus (1.37 ± 1.04) exhibited higher values than Sealer 26 (0.92 ± 0.51), while LC (1.80 ± 0.98) showed greater bond strength than THT (1.16 ± 0.50) and SC (0.92 ± 0.25). The cervical (1.45 ± 1.14) third exhibited higher bond strength, followed by the middle (1.20 ± 0.72) and apical (0.78 ± 0.33) thirds. AH Plus/LC (2.26 ± 1.15) exhibited the highest bond strength values, followed by AH Plus/THT (1.32 ± 0.61), Sealer 26/LC (1.34 ± 0.42), and Sealer 26/THT (1.00 ± 0.27). The lowest values were obtained with AH Plus/SC and Sealer 26/SC. Thus, it can be concluded that the filling technique affects the bond strength of sealers. LC was associated with higher bond strength between the material and intra-radicular dentine than THT and SC techniques.
本研究的目的是评估不同根管充填技术对环氧树脂类封闭剂粘结强度的影响。使用ProTaper（F5）制备60颗单根管犬牙，并根据根管充填技术将其分为以下几组：侧方加压充填（LC）、单锥充填（SC）和Tagger混合技术（THT）。还根据所用封闭剂材料创建了以下亚组（n = 10）：AH Plus和Sealer 26。从所有牙根的三分之一处切取2毫米厚的切片，并进行推出试验。使用方差分析和Tukey检验（α = 0.05）分析数据（MPa）。推出值受封闭剂、充填技术和牙根三分之一部位的显著影响（p < 0.05）。AH Plus（1.37 ± 1.04）的值高于Sealer 26（0.92 ± 0.51），而LC（1.80 ± 0.98）的粘结强度高于THT（1.16 ± 0.50）和SC（0.92 ± 0.25）。颈部（1.45 ± 1.14）三分之一部位的粘结强度更高，其次是中部（1.20 ± 0.72）和根尖（0.78 ± 0.33）三分之一部位。AH Plus/LC（2.26 ± 1.15）表现出最高的粘结强度值，其次是AH Plus/THT（1.32 ± 0.61）、Sealer 26/LC（1.34 ± 0.42）和Sealer 26/THT（1.00 ± 0.27）。AH Plus/SC和Sealer 26/SC获得的值最低。因此，可以得出结论，充填技术会影响封闭剂的粘结强度。与THT和SC技术相比，LC与材料和根管内牙本质之间更高的粘结强度相关。
