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Residual antibiofilm effects of various concentrations of double antibiotic paste used during regenerative endodontics after different application times.

Abstract：

OBJECTIVE:We investigated the residual antibiofilm effects of different concentrations of double antibiotic paste (DAP) applied on radicular dentin for 1 or 4 weeks. DESIGN:Dentin samples were prepared (n=120), sterilized and pretreated for 1 or 4 weeks with the clinically used concentration of DAP (500mg/mL), low concentrations of DAP (1, 5 or 50mg/mL) loaded into a methylcellulose system, calcium hydroxide (Ca(OH)2), or placebo paste. After the assigned treatment time, treatment pastes were rinsed off and the samples were kept independently in phosphate buffered saline for 3 weeks. Pretreated dentin samples were then inoculated with Enterococcus faecalis and bacterial biofilms were allowed to grow for an additional 3 weeks. Biofilms were then retrieved from dentin using biofilm disruption assays, diluted, spiral plated, and quantified. Fisher's Exact and Wilcoxon rank sum tests were used for statistical comparisons (α=0.05). RESULTS:Dentin pretreatment for 4 weeks with 5, 50 or 500mg/mL of DAP demonstrated significantly higher residual antibiofilm effects and complete eradication of E. faecalis biofilms in comparison to a 1 week pretreatment with similar concentrations. However, dentin pretreated with 1mg/mL of DAP or Ca(OH)2 did not provide a substantial residual antibiofilm effect regardless of the application time. CONCLUSIONS:Dentin pretreatment with 5mg/mL of DAP or higher for 4 weeks induced significantly higher residual antibiofilm effects in comparison to a 1 week pretreatment with the same concentrations.

journal_name

Arch Oral Biol

journal_title

Archives of oral biology

authors

Jenks DB,Ehrlich Y,Spolnik K,Gregory RL,Yassen GH

doi

10.1016/j.archoralbio.2016.06.006

subject

Has Abstract

pub_date

2016-10-01 00:00:00

pages

88-93

eissn

0003-9969

issn

1879-1506

pii

S0003-9969(16)30146-7

journal_volume

70

pub_type

杂志文章

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