Objective To evaluate the effect of furcal perforation treated with iRoot BP.Methods Forty newly extracted human maxillary and mandibular molars were collected.Holes in diameter of 2 mm were prepared at the roof of the central pulp cavity of 36 samples with high speed round ball diamond in order to make perforated model,and then equally and randomly divided them into two groups.The other intact four samples were used as the negative controls.In the experimental groups,group A were repaired by iRoot BP,group...
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