Moinzadeh A-T, Mirmohammadi H, Hensbergen I A M, Wesselink P R, Shemesh H
Department of Endodontology, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University, Amsterdam, The Netherlands.
Int Endod J. 2015 Feb;48(2):193-8. doi: 10.1111/iej.12300. Epub 2014 Jun 25.
To investigate the correlation between fluid transport and dislocation resistance in canals filled with a methacrylate-based filling material.
The root canals in sixty-five single-rooted human teeth were prepared to size 40, 0.06 taper. Sixty roots were filled with a single-cone technique using RealSeal SE sealer and divided into 3 groups, whilst five roots served as fluid transport positive control. Group 1 (n = 20): correlation group. Specimens were consecutively tested with fluid transport for 90 min and thereafter with the push-out test at coronal and apical root levels. Group 2 (n = 20): push-out control. Specimens were only subjected to the push-out test at coronal and apical root levels. Group 3 (n = 20): fluid transport negative control. Specimens were totally covered with nail varnish. The correlation between fluid transport and dislocation resistance was assessed by Kendall's tau-b coefficient. The Mann-Whitney U-test was used to compare dislocation resistance between groups 1 and 2 and fluid transport between groups 1 and 3. Significance level was set at P < 0.05.
Kendall's tau-b correlation coefficients between fluid transport and dislocation resistance were weak, being coronally 0.139 (P = 0.444) and apically -0.080 (P = 0.658). No significant difference in dislocation resistance could be detected between groups 1 and 2 at both root levels (P = 0.052 and P = 0.336, respectively).
No significant correlation could be identified between fluid transport and dislocation resistance, meaning that the corono-apical sealing ability of a methacrylate-based root canal filling is independent of its adhesive properties as indicated by its dislocation resistance.
研究在充满甲基丙烯酸酯类充填材料的根管中液体输送与抗脱位性之间的相关性。
将65颗单根人牙的根管预备至40号、0.06锥度。60个根管采用单锥技术使用RealSeal SE封闭剂进行充填，并分为3组，同时5个根管作为液体输送阳性对照。第1组（n = 20）：相关性组。标本连续进行90分钟的液体输送测试，然后在冠方和根尖水平进行推出试验。第2组（n = 20）：推出对照组。标本仅在冠方和根尖水平进行推出试验。第3组（n = 20）：液体输送阴性对照。标本完全用指甲油覆盖。通过Kendall's tau-b系数评估液体输送与抗脱位性之间的相关性。采用Mann-Whitney U检验比较第1组和第2组之间的抗脱位性以及第1组和第3组之间的液体输送情况。显著性水平设定为P < 0.05。
液体输送与抗脱位性之间的Kendall's tau-b相关系数较弱，冠方为0.139（P = 0.444），根尖方为-0.080（P = 0.658）。在两个根水平上，第1组和第2组之间的抗脱位性均未检测到显著差异（分别为P = 0.052和P = 0.336）。
未发现液体输送与抗脱位性之间存在显著相关性，这意味着甲基丙烯酸酯类根管充填材料的冠根向封闭能力与其抗脱位性所表明的粘结性能无关。
