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Radiographic bone fill.
Values are presented as mean±standard deviation.
NC: porous nonchemical cross-linking collagen membrane, BC: bilayer collagen membrane, BM: bone mineral, CEJ-BD: distance between the cemento-enamel junction and the bottom of the defect.
a)There was no statistically significant difference between the test and control groups.
b)There was statistically significant difference compared to baseline in both test and control groups.
