•One-Up Bond is a self-etching, self-priming, one-step bonding agent •Purpose: investigate the ability of MTA, One-Up Bond, and MTA with a secondary seal of One-Up Bond or SuperEBA to seal saucer-shaped furcation perforations in human molars using a fluid-filtration model.
•N= 50 extracted, human molars. (10 control teeth & 40 experimental).
o Cusps removed, access, canals were prepared and then obturated.
oA hole was made in center of furcation, 18-gauge SS tubing was forced into hole and cemented.
oA saucer-shaped defect was created over this hole in the chamber floor with a round bur. (fig.)
oTeeth soaked in 5.25% NaOCl for 5 min, rinsed with water, dried and randomly divided into 4 groups (Next slide)
oMicroleakage assessment with fluid-filtration technique was done at 24h & 1month.
oAfter the experiment, 2 teeth per group were sectioned to measure remaining dentin & restorative materials thickness with videomicrometer system.
Most highlighted Results:
1.All materials sealed perforations well, both initially & during 1-month duration
2.No significant difference between any of the groups and –ve controls. 3.MTA alone leaked significantly more than One-Up Bond alone and the secondary seal groups (3+4) at 24 h.
4.No significant differences between MTA with a secondary seal of One-Up Bond or SuperEBA at 24 h.
5.With time, the seal of MTA improved, whereas that of One-Up alone or MTA with SuperEBA worsened.
6.At 1 month, MTA, MTA plus One-Up Bond, and One-Up Bond alone were equivalent
7.No significant differences in remaining dentinal or repair materials thickness among four groups.
MTA and One-Up Bond in combination or alone are equivalent in furcation perforation repair when tested within a 1 month period.