Effect of Neem and NaOCl on Postoperative Pain and Amount of Endotoxins

Study Overview
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Brief Summary
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The aim of this study is to compare the effect of Neem (azadirachta indica) and 2.5% sodium hypochlorite as root canal irrigants on the intensity of post-operative pain and the amount of endotoxins in necrotic teeth.

Detailed Description
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According to the eligibility and exclusion criteria the patients will be selected and randomly divided into two groups. The operator N.S. will complete endodontic treatment of all cases in two visits as following: Anaesthetizing the tooth using inferior alveolar nerve block followed by buccal infiltration technique. Isolation the tooth with a rubber dam and disinfect the tooth using sterile swabs moistened with 30% H2O2 (v/v) for 30 seconds followed by 5.25% NaOCl for 30 seconds and 5% sodium thiosulphate for inactivation of the disinfecting agents . Performing access cavity preparation in two stage : The first stage: will be performed to allow removal of contamination which includes carious lesions and restoration using high speed sterile round bur and diamond stone. In second stage: before entering the pulp chamber, the access cavity will be disinfected . For endotoxins sampling, the first sample (S1): N.S. will take the sample by introducing a sterile paper point (size #15) into the full working length of the wider / largest canals or canals that show presence of the exudate. N.S. will place the sample in a sterile glass for further Enzyme-linked immunosorbent assay (ELISA). After the first sampling,Taking working length using electronic apex locator and then will be confirmed radio-graphically . Performing the biomechanical preparation for the two groups in a crown-down technique using ProTaper Next rotary system. Irrigation with 2mL of specified irrigation either 2.5% NaOCl or Neem irrigant will be performed each time instrument is changed with 30-gauge side-vented needles. After complete mechanical preparation, the root canals will be flushed using 5mL of sterile saline solution. Before the second sampling (S2): N.S. will irrigate the prepared root canal with 5 mL of 17% EDTA solution for 3 minutes followed by a final rinse with 5 mL of a sterile saline solution to remove smear layer. NS will seal the access cavity with temporary filling material. Scheduling the second appointment 1 week after the first appointment;. NS will irrigate the root canals with 5 mL of a sterile saline solution. N.S. will give the patients a pain diary to record the postoperative pain after 6,12,24 and 48h post-instrumentation. in second appointment: After master cone fit radiograph and selection of the master cone, all canals will be filled using cold lateral condensation technique with resin-based sealer. N.S. will give the patients another pain diary to record the postoperative pain after 6, 12, 24 and 48 hours post-obturation.

Official Title
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Effect of Neem (Azadirachta Indica) Versus 2.5% Sodium Hypochlorite as Root Canal Irrigants on the Intensity of Post-operative Pain and Amount of Endotoxins in Necrotic Teeth

Conditions
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Pathologic Processes, Pain, Postoperative Pain, Postoperative Complications, Necrosis

Intervention / Treatment
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* Drug: Neem
* Drug: 2.5% sodium hypochlorite


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: 1- Mandibular molar teeth: Diagnosed clinically with pulp necrosis. Absence of spontaneous pain Pain on palpation or tenderness to percussion. Periradicular radiolucency or widening of periodontal membrane space. 2- Patients' acceptance to participate in the trial. 3- Patients who can understand NRS scale and can sign the informed consent. Exclusion Criteria: 1. Primary teeth and permanent teeth with immature roots which require special endodontic treatment protocol that seeking for obtaining good apical seal, proper cleaning, shaping and obturation 2. Patients who have received antibiotics for the last 3 months before the study or any medication that could alter their perception of pain, inflammation and infection . 3. Teeth previously accessed or endodontically treated as they have low success rate . 4. Patients with diabetes, immune-compromising and immune-suppresion disease as the healing is much more slowly and more liable to infection . 5. Pregnant patients to avoid exposure to radiograph. Moreover, pain perception may be altered due to hormonal changes . 6. Teeth with deep pocket >4 mm as it has poor prognosis and deep pockets are harbor area for infection which need specific surgical and periodontal treatment . 7. Teeth that could not be isolated with a rubber-dam or could not be restorable. 8. Tooth associated with vertical root fracture, coronal perforation, calcification and external or internal root resorption as it has poor prognosis.

Ages Eligible for Study
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Minimum Age: 16 Years
Maximum Age: 65 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Neem (Azadirachta indica)<br>Neem (Azadirachta indica) (alcoholic solution) used as an anti inflammatory , antibacterial irrigant | Drug: Neem<br>* A natural irrigant solution act as anti-inflammatory and anti bacterial<br>* Other names: Azadirachta indica;|
| Active Comparator: 2.5%sodium hypochlorite<br>2.5% sodium hypochlorite, anti-bacterial root canal irrigant solution | Drug: 2.5% sodium hypochlorite<br>* anti bacterial root canal irrigant solution<br>* Other names: 2.5% NaOCL;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| post operative pain | post-instrumentaion pain and post-instrumentation pain assessed with the Numerical Rating Pain Scale | Up to 48 hours | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| endotoxins | The quantitative enzyme-linked immunosorbent assay (ELISA) is a plate-based assay technique and is considered highly sensitive and specific test for detection and quantifying of endotoxin in the root canals by using a commercial standard kit. The samples will be collected by the operator and will be stored at -80C so that all the samples would be processed at the same time by ELISA. | 6 hours |