Subject: three group (n=10) and mounted in

Subject: This is an experimental study which will be
conducted at the UQUDENT hospital of umm al-qura university Makkah, KSA. The
total number of extracted teeth will be 30.

Ethical approval: Ethical approval from
institutional reviewing board will be obtained before starting this study.

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The Inclusion criteria for the study samples
is as follows:

§  Extracted teeth with single
canal and closed apex.

The exclusion criteria for the study samples
is as follows:

§ 
Tooth with multi-canal.

§ 
Tooth with crack or fractures.

§ 
Tooth with open apex.

§ 
Tooth with sever curvature.

Thirty extracted human teeth were collected
and cleaned from any debris then stored first with 10% of sodium hypochlorite
for one day and then stored in saline. Teeth then decoronated with a diamond
wheel and achieve working length about 16 mm using K-type file number 10
inserted into the canal until it visible from the apical foramen, working
length was set 1mm short of the length. Teeth divided randomly into three group
(n=10) and mounted in transparent acrylic resin. For the cleaning and shaping
start with K-type file number 15 to establish apical patency and followed with
K-type file number 20 and 25, irrigation with 2 ml of 2.5% sodium hypochlorite
between each file. The root canal then instrumented using ProTaper Next rotary
system according to the manufacturers’ instructions, three file used X1-yellow,
X2-red and X3-blue. Irrigation with 2 ml of 2.5% sodium hypochlorite between
each file during instrumentation followed by 17% of EDTA aqueous solution. EDTA
17% used for final rinse. Dryness with paper point. According to the groups we
have three obturation techniques.

 The
first group will receive a root canal filling by using System-B with
gutta-percha cartridges, master gutta-percha cone inserted to the canal and
coated with resin based to the full working length, pack the filling material
and place within 5 mm to the canal terminus, then flow the gutta-percha
material into the canal and compact the canal with plugger until the desire
level.

The second group will receive a root canal
filling by lateral condensation technique, master gutta-percha cone coated with
resin based sealer and inserted to the full working length, accessory
gutta-percha cone coated with the same sealer and inserted to the canal and
lateral condensation performed until the canal filled and can’t introduce more
accessory gutta-percha cone.

The third group will receive a root canal
filling by using single cone technique, F3 ProTaper gutta-percha cone selected
and coated with resin based sealer and inserted to the full working length.

All the three group will place at the
computed tomography machine; three horizontal section will be analysed (apical
third, middle third and coronal third).

 Validity and Reliability of the
test: The intra examiner consistency will be
maintained through training and repeat examination until satisfaction result
obtain. replication of statistically significant results, under the same conditions and
generate the same results.

Statistical
analysis: Data
will be collected and tabulated and statistically evaluated by Statistical
Package for Social Science (SPSS) Version 22 for mac.

 

 

 

 

 

 

 

 

 

 

 

 

 

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