The aim of this study was to evaluate the push out test strength of conventional or anatomical fiberglass posts treated with experimental silanes formulated with thio-urethane oligomers. In the bovine teeth endodontic treatment were used conventional fiberglass posts or anatomical fiberglass posts customized with Filtek Z250 resin composite layer modeling the anatomy of the root canal. The roots were randomly divided into 8 groups (n = 10): CP-RX (Control); CP-HDDI; CP-HDMI; CP-BDI; AP-RX (Control); AP-HDDI; AP-HDMI; and AP-BDI⁽*⁾. Slices of each root third were subjected to the push out test and failure pattern evaluation (%). Marginal microleakage was observed in root slices submitted to 2% methylene blue solution (%). Push out test strength data were statistically evaluated using Core Team R Program (Language and environment for statistical computing - Foundation for Statistical Computing, Austria) at a significance level of 5%. Results showed that the bond strength varied for each root third as function of the fiberglass post types used ⁽**⁾. For the conventional posts, CP-HDMI and CP-BDI presented higher and significantly similar strengths at the cervical third. CP-HDDI, CP-HDMI and CP-BDI demonstrated higher and significantly similar strengths at the middle third, and CP-HDMI and CP-BDI presented higher and significantly similar strengths at the apical third. For the anatomical posts, AP-RX presented significantly higher strength at the cervical third; AP-RX, AP-HDDI, AP-HDMI and AP-BDI demonstrated greater and significantly similar strengths at the middle third, and AP-RX, AP-HDDI and AP-HDMI showed higher and significantly similar strengths at the apical third. For different post types as function of each silane, AP-RX, CP-HDMI, and CP-BDI had significantly higher strengths at the cervical third; AP-RX, CP-HDMI and CP-BDI displayed significantly higher strengths at the middle third, and CP-HDMI and CP-BDI had significantly higher strengths at the apical third. Mixed failures predominated and the microleakage scores varied between 3 (up to 2/3) and 4 (+2/3). The results showed positive effect of the experimental silanes composed by thio-urethane oligomers in all situations analyzed. Different values in the adhesion of fiberglass posts in relation to experimental silanes were observed, as well as its relation to adhesion in the root thirds. Mixed failures predominated and the microleakage showed similar values among root regions.

这项研究的目的是评估用硫代氨基甲酸酯低聚物配制的实验硅烷处理过的常规或解剖玻璃纤维桩的推出强度。在牛牙根管治疗中，使用常规的玻璃纤维桩或采用Filtek Z250树脂复合层定制的解剖玻璃纤维桩，以模拟根管的解剖结构。将根随机分为8组（n = 10）：CP-RX（对照）；CP-HDDI; CP-HDMI；CP-BDI; AP-RX（控制）；AP-HDDI；AP-HDMI；和AP-BDI ^（ * ^）。将每个根的三分之一的切片进行推出测试和破坏模式评估（％）。在根片中观察到微微渗漏，该根片经受了2％的亚甲基蓝溶液（％）。使用Core Team R程序（统计计算的语言和环境-统计学计算基金会，奥地利）对推出的测试强度数据进行统计评估，显着性水平为5％。结果表明，每个根部三分之一的粘结强度随所用玻璃纤维桩类型的变化而变化^（ ** ^）。对于常规职位，CP-HDMI和CP-BDI在宫颈第三位表现出更高且明显相似的强度。CP-HDDI，CP-HDMI和CP-BDI在中间三分之一处显示出更高且明显相似的强度，而CP-HDMI和CP-BDI在顶端三分之一处显示出更高且明显相似的强度。对于解剖职位，AP-RX在颈第三位表现出明显更高的强度。AP-RX，AP-HDDI，AP-HDMI和AP-BDI在中间三分之一处表现出更大且明显相似的强度，而AP-RX，AP-HDDI和AP-HDMI在顶端三分之一处表现出更高且明显相似的强度。对于每种硅烷的功能不同的职位类型，AP-RX，CP-HDMI和CP-BDI在宫颈第三位具有明显更高的强度；AP-RX，CP-HDMI和CP-BDI在中间三分之一处显示出明显更高的强度，而CP-HDMI和CP-BDI在顶端三分之一处显示出明显更高的强度。混合故障占主导地位，微渗漏评分在3（高达2/3）和4（+2/3）之间变化。结果表明，在所有分析情况下，由硫代氨基甲酸酯低聚物组成的实验硅烷均具有积极作用。观察到玻璃纤维桩相对于实验硅烷的粘附力值不同，以及其与根部三分之一的粘附力的关系。混合故障占主导地位，并且根部区域的微渗漏显示出相似的值。结果表明，在所有分析情况下，由硫代氨基甲酸酯低聚物组成的实验硅烷均具有积极作用。观察到玻璃纤维桩相对于实验硅烷的粘附力值不同，以及其与根部三分之一的粘附力的关系。混合故障占主导地位，并且根部区域的微渗漏显示出相似的值。结果表明，在所有分析情况下，由硫代氨基甲酸酯低聚物组成的实验硅烷均具有积极作用。观察到玻璃纤维桩相对于实验硅烷的粘附力值不同，以及其与根部三分之一的粘附力的关系。混合故障占主导地位，并且根部区域的微渗漏显示出相似的值。