الفهرس 
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Abstract
Aim: to assess the postoperative agony and bacterial decrease following root
trench treatment in teeth with necrotic mash utilizing calcium hydroxide, calcium
hydroxide blended in with chlorohexidine and nanoparticles calcium hydroxide as
intracanal drug.
Techniques: 80 male or female patients of 25-50years old with asymptomatic
uniradicular necrotic teeth were chosen and haphazardly allocated into four
gatherings as per the intra-trench prescription utilized: no dressing gatherings
(control bunch), calcium hydroxide bunch (CH) with saline, calcium hydroxide
with chlorhexidiene, nano particles calcium hydroxide. After separation, access
hole was performed trailed by chemo-mechanical planning utilizing Fanta rotating
records and ordinary water system protcol then intra-waterway medicine was set
by lentulo winding in the main treatment meeting. While in the second meeting
following 7 days, the intracanal medicine were eliminated and channel were
obturated. Postoperative agony was evaluated at 4, 24, 48 hours and following 7
days postoperatively utilizing NRS. Bacteriological examples got from the root
channels previously (S1) and after instrumentation (S2) in the primary treatment
meeting. In this manner, bacterial decrease was surveyed in the second meeting
following 7 days (S3) utilizing province shaping unit test.
Results: All intracanal medicaments brought about a measurably huge
lessening in mean torment esteem from 4 hours to 7 days postoperatively. While,
when contrasting all gatherings, nano particles calcium hydroxide showed the most
un-present employable agony contrasted on others gatherings and no genuinely
huge distinction. A genuinely critical bacterial tally decrease from S1 TO S2 and
from S2 to S3. Nano particles calcium hydroxide accomplished critical bacterial
check decrease contrasted with others gatherings.