Study: NCT06418386

Intervention type: PROCEDURE
Group type: ACTIVE_COMPARATOR
Intervention: manual saline IA
Description: * The procedural tooth is anesthetized and isolated with rubber dam. The tooth and adjacent rubber dam will be disinfected with tincture of iodine solution, All carious tissue will be removed by hight speed handpiece, distal cannel of mandibular primary molars and palatal cannel of maxillary primary molars will be chosen for sampling procedure.~* A sterile broach will be inserted to obtain root cannel content then sterile paper point inserted to root canal and will be left for 1 min ,The paper point will be removed with sterilized tweezer which will immediately transferred to tube containing transport medium (eppendrof of containing 200 μl nutrient broth medium),using manual k file starting with #15 and irrigation with normal saline~* Post irrigation sample and pre-preparation sample will be transferred to microbiological laboratory Canals will be filed with obturation material(Metapex)then crown will be restored with glass inomar and stainless steel crown

Intervention type: PROCEDURE
Group type: EXPERIMENTAL
Intervention: manual neem IB
Description: * The procedural tooth is anesthetized and isolated with rubber dam. The tooth and adjacent rubber dam will be disinfected with tincture of iodine solution~* . All carious tissue will be removed by high speed hand piece~  , distal cannel of mandibular primary molars and palatal cannel of maxillary primary molars will be chosen for sampling procedure.~* A sterile broach will be inserted to obtain root cannel content then sterile paper point inserted to root canal and will be left for 1 min 19 The paper point will be removed with sterilized tweezer which will immediately transferred to tube containing transport medium (eppendrof of containing 200 μl nutrient broth medium).~* using manual file and irrigation with neem leaf extract 100%~* Post irrigation sample and pre-preparation sample will be transferred to microbiological laboratory Canals will be filed with obturation material(Metapex)then crown will be restored with glass inomar and stainless steel crown

Intervention type: PROCEDURE
Group type: EXPERIMENTAL
Intervention: manual sodium hypochlorite IC
Description: * adjacent rubber dam will be disinfected with tincture of iodine solution~* . All carious tissue will be removed by hight speed hand piece~* distal cannel of mandibular primary molars and palatal cannel of maxillary primary molars will be chosen for sampling procedure.~* A sterile broach will be inserted to obtain root cannel content then sterile paper point inserted to root canal and will be left for 1 min 19 The paper point will be removed with sterilized tweezer which will immediately transferred to tube containing transport medium (eppendrof of containing 200 μl nutrient broth medium).~* using manual file and irrigation with 1% sodium hypochlorite~* Post irrigation sample and pre-preparation sample will be transferred to microbiological laboratory Canals will be filed with obturation material(Metapex)then crown will be restored with glass inomar and stainless steel crown

Intervention type: PROCEDURE
Group type: EXPERIMENTAL
Intervention: rotary saline IIA
Description: * shaping and cleaning done with using AF baby fanta files open file:#17 taper 08,then #20 taper 04 ,yellow then #25 taper 04 red , then #30 taper 04 blue . the files activated with torque 2 and speed 350 . Irrigation with normal saline~* Post irrigation sample and pre-preparation sample will be transferred to microbiological laboratory Canals will be filed with obturation material(Metapex)then restored with glass inomar and stainless steel crown

Intervention type: PROCEDURE
Group type: EXPERIMENTAL
Intervention: rotary neem IIB
Description: * The procedural tooth is anesthetized and isolated with rubber dam as mentioned~* All carious tissue will be removed by high speed hand piece ,distal cannel of mandibular primary molars and palatal cannel of maxillary primary molars will be chosen for sampling procedure.~* A sterile broach will be inserted to obtain root cannel content then sterile paper point inserted to root canal and will be left for 1 min The paper point will be removed with sterilized tweezer which will immediately transferred to tube containing transport medium (eppendrof of containing 200 μl nutrient broth medium).~* using AF baby fanta files SAME AS METION BEFORE ,and irrigation with 100%neem extract~* Post irrigation sample and pre-preparation sample will be transferred to microbiological laboratory Canals will be filed with obturation material(Metapex)then crown will be restored with glass inomar and stainless steel crown

Intervention type: PROCEDURE
Group type: EXPERIMENTAL
Intervention: rotary sodoium hypochlorite IIC
Description: * The procedural tooth is anesthetized and isolated with rubber dam as mentioned~* All carious tissue will be removed by hight speed hand piece,distal cannel of mandibular primary molars and palatal cannel of maxillary primary molars will be chosen for sampling procedure.~* A sterile broach will be inserted to obtain root cannel content then sterile paper point inserted to root canal and will be left for 1 min The paper point will be removed with sterilized tweezer which will immediately transferred to tube containing transport medium (eppendrof of containing 200 μl nutrient broth medium).~* using AF baby fanta files SAME AS MENTION BEFORE , and irrigation with 1% sodium hypochlorite~* Post irrigation sample and pre-preparation sample will be transferred to microbiological laboratory Canals will be filed with obturation material(Metapex)then crown will be restored with glass inomar and stainless steel crown