Dental Materials ( IF 5 ) Pub Date : 2018-05-01 Adriana Lemos Mori Ubaldini, Ana Raquel Benetti, Francielle Sato, Renata Corrêa Pascotto, Antonio Medina Neto, Mauro Luciano Baesso, Anne Peutzfeldt
Objective
To investigate the relationship between physicochemical interactions of resin luting cements with dentine and retention of fibre posts in root canals.
Methods
Retention of fibre posts (RelyX Fiber Post) was assessed by the pull-out method. The diffusion zone of the cements and their chemical interaction with dentine were estimated by micro-Raman spectroscopy. Resin luting cements employing etch-and-rinse (Rely X Ultimate and Variolink II), self-etch (Rely X Ultimate and Panavia F2.0), or self-adhesive (RelyX Unicem 2) modes were investigated. Data were analyzed by analysis of variance followed by Tukey HSD tests.
Results
The retention of the fibre posts decreased in the following order: RelyX Ultimate, etch-and-rinse mode > RelyX Unicem 2 ≥ RelyX Ultimate, self-etch mode ≥ Panavia F2.0 ≥ Variolink II (p < 0.05). One of the etch-and-rinse mode cements presented the deepest diffusion zone, while the other, along with the self-adhesive cement, produced the shallowest zone. Cements used in the self-etch mode showed intermediary diffusion into dentine (p < 0.05). All resin luting cements showed some degree of chemical interaction with dentine, the highest recorded for RelyX Ultimate used in the etch-and-rinse mode and the lowest for Panavia F2.0 (p < 0.05). The retention of fibre posts in the root canal could be attributed neither to the mode of interaction of the luting cements with dentine nor to their ability to diffuse into dentine.
Significance
Chemical interaction between the resin luting cement and the dentine paired with adequate post pretreatment contribute positively to the retention of fibre posts.
中文翻译:
切割纤维桩的挑战:粘附在桩和牙本质上
客观的
调查树脂胶粘剂与牙本质的物理化学相互作用与牙根管中纤维桩的保留之间的关系。
方法
通过拉出法评估纤维柱(RelyX纤维柱)的保持力。通过显微拉曼光谱法估计了水泥的扩散区及其与牙本质的化学相互作用。研究了采用蚀刻和冲洗(Rely X Ultimate和Variolink II),自蚀刻(Rely X Ultimate和Panavia F2.0)或自粘(RelyX Unicem 2)模式的树脂胶泥。数据通过方差分析和随后的Tukey HSD测试进行分析。
结果
光纤立柱的保持力按以下顺序降低:RelyX Ultimate,蚀刻和冲洗模式> RelyX Unicem 2≥RelyX Ultimate,自蚀刻模式≥Panavia F2.0≥Variolink II(p <0.05)。蚀刻和冲洗模式的一种水泥呈现出最深的扩散带,而另一种与自粘性水泥一起呈现出最浅的带。在自蚀刻模式下使用的水泥显示出中间扩散进入牙本质(p <0.05)。所有树脂胶粘剂水泥都显示出与牙本质的某种化学相互作用,在蚀刻和冲洗模式下使用RelyX Ultimate记录的最高,而Panavia F2.0记录的最低(p <0.05)。纤维桩在牙根管中的保留既不能归因于粘固剂与牙本质的相互作用方式,也不能归因于它们扩散到牙本质中的能力。
意义
树脂胶合剂和牙本质之间的化学相互作用,加上适当的后预处理,对纤维柱的保持有积极作用。