Aggarwal Vivek, Singla Mamta, Miglani Sanjay, Kohli Sarita
Department of Conservative Dentistry and Endodontics, Faculty of Dentistry, Jamia Millia Islamia, New Delhi, India.
J Conserv Dent. 2013 Sep;16(5):462-5. doi: 10.4103/0972-0707.117504.
Few studies have comparatively evaluated the push-out bond strength of different calcium silicate-based materials (CSMs) used in furcal perforation repair. The objective of this in vitro study was to comparatively evaluate the push-out bond strength of commercially available CSMs used as furcation repair materials, in the presence of blood contamination.
Furcal perforations were made in 120 molars and were divided on the basis of the repair material used (ProRoot MTA, Biodentine, and MTA Plus), blood contamination, and duration of setting time (24 h vs. 7 days). Push-out bond strength was measured and analyzed by three-way analysis of variance (ANOVA) test.
Push-out bond strength increased with time. The 24-h push-out strength of MTA was less than that of Biodentine. Blood contamination affected the push-out bond strength of MTA Plus irrespective of the setting time.
Caution should be taken while condensing restorative materials over furcation repair materials.
很少有研究对用于根分叉穿孔修复的不同硅酸钙基材料（CSMs）的推出粘结强度进行比较评估。本体外研究的目的是在存在血液污染的情况下，比较评估用作根分叉修复材料的市售CSMs的推出粘结强度。
在120颗磨牙上制作根分叉穿孔，并根据使用的修复材料（ProRoot MTA、Biodentine和MTA Plus）、血液污染和凝固时间（24小时与7天）进行分组。通过三因素方差分析（ANOVA）测试测量并分析推出粘结强度。
推出粘结强度随时间增加。MTA在24小时时的推出强度低于Biodentine。无论凝固时间如何，血液污染都会影响MTA Plus的推出粘结强度。
在根分叉修复材料上方凝结修复材料时应谨慎。
