Hamad Hatim A, Tordik Patricia A, McClanahan Scott B
Naval Postgraduate Dental School, Bethesda, Maryland.
J Endod. 2006 Apr;32(4):337-40. doi: 10.1016/j.joen.2005.10.002.
The purpose of this study was to evaluate the ability of gray and white ProRoot MTA to seal furcation perforations in mandibular molars using a dye extraction leakage model. Sixty-four mandibular molars were randomly divided into four experimental groups. Six teeth with perforations were used as positive controls and six teeth without perforations were used as negative controls. Perforations in groups 1 and 2 were repaired with white MTA. Groups 3 and 4 were repaired with gray MTA. Dye leakage was tested from an orthograde direction (groups 1 and 3) and a retrograde direction (groups 2 and 4). After dye extraction, absorbance was measured on a spectrophotometer at 550 nm. No statistically significant difference in leakage was found between gray and white MTA when used as a furcation perforation repair material. However, there was significantly more leakage when the perforations were challenged from the orthograde than the retrograde direction (p < 0.001).
本研究的目的是使用染料提取渗漏模型评估灰色和白色的ProRoot MTA封闭下颌磨牙根分叉穿孔的能力。64颗下颌磨牙被随机分为4个实验组。6颗有穿孔的牙齿用作阳性对照，6颗无穿孔的牙齿用作阴性对照。第1组和第2组的穿孔用白色MTA修复。第3组和第4组用灰色MTA修复。从顺行方向（第1组和第3组）和逆行方向（第2组和第4组）测试染料渗漏情况。染料提取后，在550nm处用分光光度计测量吸光度。当用作根分叉穿孔修复材料时，灰色和白色MTA之间在渗漏方面未发现统计学上的显著差异。然而，当穿孔从顺行方向受到挑战时，渗漏明显多于逆行方向（p<0.001）。
