Bacterial retention in canal walls in vitro: effect of smear layer.

  title={Bacterial retention in canal walls in vitro: effect of smear layer.},
  author={David R. Drake and Angelika Wiemann and Eric Rivera and Richard E. Walton},
  journal={Journal of endodontics},
  volume={20 2},
When dentin is planed by endodontic instruments, a smear layer forms. Whether this layer should be removed is unknown and controversial. This study was conducted to assess the effect of the smear layer on retention of bacteria using an in vitro root canal bacterial colonization model. Canals of 26 extracted human canines were step-back prepared using 2.5% NaOCl. Teeth were then randomly divided into two groups based on the type of high volume final flush: 1-20 ml of sterile saline (0.85% wt/vol… CONTINUE READING


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