The adhesion between fiber posts and root canal walls. comparison between microtensile and push-out bond strength measurements
The adhesion between fiber posts and root canal walls. comparison between microtensile and push-out bond strength measurements
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DOI：
10.1111/j.1600-0722.2004.00146.x
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发表时间：
2004-08-01
影响因子：
1.9
通讯作者：
Ferrari, M
中科院分区：
文献类型：
--
作者：
Goracci, C;Tavares, AU;Ferrari, M
该研究的目的是将微拉伸技术的修剪和非修剪变体与“微”推出测试进行比较，以准确测量根管内纤维柱的粘合强度。在 15 颗经过牙髓治疗的牙齿（A 组）中，纤维桩采用 Excite DSC 与 Variolink II (Ivoclar-Vivadent) 相结合进行粘合。在 15 根中，使用 RelyX Unicem (3M-ESPE) 进行纤维后粘合（B 组）。在每组中，通过修整和非修整微拉伸技术以及推出测试来评估水泥纤维桩的粘合强度。大量的过早失效（A 组为 16.9%，B 组为 27.5%）和高标准偏差值的发现使修剪微拉伸技术的可靠性受到质疑。采用非修剪微拉伸技术，总共六个根只获得了五根棍子。其余样本在切割阶段过早失效。通过推出测试，没有发生过早失效，数据分布的变异性是可以接受的，并且可以评估根级之间粘合强度的区域差异。一般来说，粘合纤维柱的粘合强度值相对较低。总之，在测量粘合纤维柱的粘合强度时，推出测试似乎比微拉伸技术更可靠。
Aim of the study was to compare the trimming and non-trimming variants of the microtensile technique with the 'micro' push-out test in the ability to measure accurately the bond strength of fiber posts luted inside root canals. In 15 endodontically treated teeth (Group A), fiber posts were cemented with Excite DSC in combination with Variolink II (Ivoclar-Vivadent). In 15 roots RelyX Unicem (3M-ESPE) was used for fiber post luting (Group B). Within each group, the bond strength of cemented fiber posts was assessed with the trimming and non-trimming microtensile technique, as well as with the push-out test. The great number of premature failures (16.9% in Group A, 27.5% in Group B) and the finding of high standard deviation values make questionable the reliability of the trimming microtensile technique. With the non-trimming microtensile technique, only five sticks were obtained from a total of six roots. The remaining specimens failed prematurely during the cutting phase. With the push-out test no premature failure occurred, the variability of the data distribution was acceptable, and regional differences in bond strength among root levels could be assessed. Relatively low values of bond strength were, in general, recorded for luted fiber posts. In conclusion, when measuring the bond strength of luted fiber posts, the push-out test appears to be more dependable than the microtensile technique.