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Clinical and Microbiological Evaluation of 0.5% Versus 3% Sodium Hypochlorite in Root Canal Treatment

Primary Purpose

Pulpitis, Apical Periodontitis

Status
Completed
Phase
Not Applicable
Locations
Sweden
Study Type
Interventional
Intervention
Irrigation with 3% NaOCl
Irrigation with 0.5% NaOCl
Sponsored by
Göteborg University
About
Eligibility
Locations
Arms
Outcomes
Full info

About this trial

This is an interventional treatment trial for Pulpitis focused on measuring Irrigation during root canal treatment, Sodium Hypochlorite

Eligibility Criteria

18 Years - undefined (Adult, Older Adult)All SexesAccepts Healthy Volunteers

Inclusion Criteria:

  • Patients in need of and willing to have a root canal treatment
  • Diagnosis Pulpitis
  • Diagnosis Apical periodontitis.
  • If a patient was referred for more than one tooth just the first treated tooth was included in the study.
  • The teeth had to be restorable and placement of rubber dam must be possible.

Exclusion Criteria:

  • patient does not understand Swedish
  • the tooth will be treated with a retrograde approach

Sites / Locations

  • Göteborg University

Arms of the Study

Arm 1

Arm 2

Arm Type

Experimental

Active Comparator

Arm Label

Irrigation with 3% NaOCl

Irrigation with 0.5% NaOCl

Arm Description

After informed consent the patient was randomly assigned to have the root canal treatment performed with a 3 % NaOCl irrigation during instrumentation. If the patient's first visit was on an uneven date the concentration of the irrigant was 3 %.

After informed consent the patient was randomly assigned to have the root canal treatment performed with a 0.5 % NaOCl irrigation during instrumentation. If the patient's first visit was on an even date the concentration of the irrigant was 0.5 %.

Outcomes

Primary Outcome Measures

Assessing bacterial growth in the root canal (positive meaning cultivable bacteria present, negative meaning absence of cultivable bacteria)
Bacterial sampling was taken just before the root canal filling. The sodium hypochlorite solution and the iodine-potassium-iodide were inactivated with 5 % sodium thiosulfate solution for 30 sec. The canals were then filled with VMGA I, dentinal shavings were produced with H files ISO #25. The entire canal content was absorbed by means of charcoal points and transferred to VMGA III.

Secondary Outcome Measures

Assessment of post-operative pain using a questionnaire containing 7 visual scales.
Each patient was instructed to fill in a questionnaire after each visit. This questionnaire contains seven visual scales (VAS) based on a 10 cm line determining the pain level. The patient is asked to estimate the pain they have 7 days after the endodontic procedure where 1 is very mild pain and 10 the worse pain they can imagine. The questionnaires were measured with a plastic ruler and the recordings will be transposed to numbers and registered in the excel file by the main investigator.

Full Information

First Posted
January 26, 2016
Last Updated
August 3, 2018
Sponsor
Göteborg University
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1. Study Identification

Unique Protocol Identification Number
NCT02681276
Brief Title
Clinical and Microbiological Evaluation of 0.5% Versus 3% Sodium Hypochlorite in Root Canal Treatment
Official Title
Clinical and Microbiological Evaluation of 0.5% Versus 3% Sodium Hypochlorite in Root Canal Treatment
Study Type
Interventional

2. Study Status

Record Verification Date
August 2018
Overall Recruitment Status
Completed
Study Start Date
October 2014 (undefined)
Primary Completion Date
August 2018 (Actual)
Study Completion Date
August 2018 (Actual)

3. Sponsor/Collaborators

Responsible Party, by Official Title
Principal Investigator
Name of the Sponsor
Göteborg University

4. Oversight

Data Monitoring Committee
No

5. Study Description

Brief Summary
Aim: To compare the clinical antimicrobial and adverse effects of irrigation with Sodium Hypochlorite (NaOCl) 0.5% versus NaOCl 3% during root canal treatment. Methodology: Consecutive patients referred to a specialist clinic of endodontics are randomly assigned to have the root canal treatment performed with a concomitant irrigation either with a buffered 0.5 % NaOCl (Dakin's solution) or 3 % NaOCl. Teeth with vital or necrotic pulps and retreatment cases were included. Root canal treatment procedures varied but followed the routines of the Specialist Clinic of Endodontics, Public Dental Health, Gothenburg, Sweden. Immediately before the root canal filling a microbial sample is taken from the operative field and the root canal. The bacterial samples were processed at the laboratory as outlined by Möller (1966). After each visit each patient was instructed to fill in a questionnaire and assess his or her post-operative pain on a visual analogue scale (VAS), with endpoints 0= "no pain" and 10= "worst imaginable pain", for seven consecutive days. The Fischer's exact test was used for statistical analyses of the differences in outcome between the groups.
Detailed Description
The aim of the present study is to compare the antimicrobial and immediate clinical effect of NaOCl 0.5% with the effect of NaOCl 3% in the endodontic treatment of teeth referred to the Specialist Clinic of Endodontics, Göteborg, Public dental Health, Västra Götaland. The efficiency of the treatment will be evaluated with sampling and cultivation methods and the assessment of patients' symptoms with a visual analogue scale. The sample size calculation was performed with a type I error of 0.05 and statistical power of 80 %. The investigators expected 70 % of the samples to be free from bacteria growth in the control group and the investigators considered clinically relevant a difference of 15 % between the groups in order to demonstrate significant differences attributable to the experimental therapy used. The investigators want our sample size to be two hundred sixty four patients, 132 to each group. A detailed explanation of the purpose of the study was given. Patients were also informed about the confidentiality of the data to be collected and about the voluntary participation. Every patient gets assigned a code that indicates which group they belong so the same irrigant is used in case of more than one visit. Root canal treatment followed the standard principles of the Specialist Clinic of Endodontics, Göteborg, Public dental Health, Västra Götaland but the treatments were not restricted to a single protocol. The recommended minimum or optimal apical size of canal preparation is size 25. All the operators are informed to perform the endodontic treatment the way operators normally do. The only variation during treatment was the concentration of the sodium hypochlorite solution for irrigation of the root canal. One group was irrigated with Sodium Hypochlorite 0.5 % (Dakin's solution) and the other group with Sodium Hypochlorite 3 %. Operators were free to choose any additional irrigant as clinically perceived necessary. The irrigants available at the clinic were 17% ethylene-diamine-tetra-acetic acid (EDTA) and iodine-potassium-iodide (IPI) 5% used as a short duration antimicrobial agent as intracanal medication for 10 minutes. Canal irrigation was carried out using 27 gauge side-cut open end needles (Monoject Luer lock syringe) with supplementation by ultrasonic agitation. Calcium hydroxide was the standard inter-appointment medicament. After sampling procedures gutta-percha and AH-plus sealer were used for root filling. The access cavity was filled with Intermediate Restorative Material (IRM) or a permanent filling with composite after each appointment and after finished root canal treatment. After bacterial sampling of the root canal, the samples were processed at the laboratory as outlined by Möller. Anaerobic incubation was done in a semi liquid medium (Hunton medium) inoculated under flow of oxygen-free gas. The mediums are checked daily for 14 days or until there is signs of microbial growth. Fischer's exact test will be used for comparisons between groups regarding growth / no growth. For assessments of pain on the VAS t-test and 95% confidence intervals will be used. All hypothesis tests will be conducted at the 0.05 level of significance. The outcomes will be analysed in term of positive Cultures and post operative pain. This is discussed further elsewhere in this application.

6. Conditions and Keywords

Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
Pulpitis, Apical Periodontitis
Keywords
Irrigation during root canal treatment, Sodium Hypochlorite

7. Study Design

Primary Purpose
Treatment
Study Phase
Not Applicable
Interventional Study Model
Parallel Assignment
Masking
Participant
Allocation
Randomized
Enrollment
264 (Actual)

8. Arms, Groups, and Interventions

Arm Title
Irrigation with 3% NaOCl
Arm Type
Experimental
Arm Description
After informed consent the patient was randomly assigned to have the root canal treatment performed with a 3 % NaOCl irrigation during instrumentation. If the patient's first visit was on an uneven date the concentration of the irrigant was 3 %.
Arm Title
Irrigation with 0.5% NaOCl
Arm Type
Active Comparator
Arm Description
After informed consent the patient was randomly assigned to have the root canal treatment performed with a 0.5 % NaOCl irrigation during instrumentation. If the patient's first visit was on an even date the concentration of the irrigant was 0.5 %.
Intervention Type
Procedure
Intervention Name(s)
Irrigation with 3% NaOCl
Intervention Description
All the operators are informed to perform the endodontic treatment the way they normally do. The only variation during treatment was the concentration of the sodium hypochlorite solution for irrigation of the root canal.
Intervention Type
Procedure
Intervention Name(s)
Irrigation with 0.5% NaOCl
Intervention Description
All the operators are informed to perform the endodontic treatment the way they normally do. The only variation during treatment was the concentration of the sodium hypochlorite solution for irrigation of the root canal.
Primary Outcome Measure Information:
Title
Assessing bacterial growth in the root canal (positive meaning cultivable bacteria present, negative meaning absence of cultivable bacteria)
Description
Bacterial sampling was taken just before the root canal filling. The sodium hypochlorite solution and the iodine-potassium-iodide were inactivated with 5 % sodium thiosulfate solution for 30 sec. The canals were then filled with VMGA I, dentinal shavings were produced with H files ISO #25. The entire canal content was absorbed by means of charcoal points and transferred to VMGA III.
Time Frame
Sample from the root canal taken immediately before root canal filling, assessing growth for 30 days after the sample is taken.
Secondary Outcome Measure Information:
Title
Assessment of post-operative pain using a questionnaire containing 7 visual scales.
Description
Each patient was instructed to fill in a questionnaire after each visit. This questionnaire contains seven visual scales (VAS) based on a 10 cm line determining the pain level. The patient is asked to estimate the pain they have 7 days after the endodontic procedure where 1 is very mild pain and 10 the worse pain they can imagine. The questionnaires were measured with a plastic ruler and the recordings will be transposed to numbers and registered in the excel file by the main investigator.
Time Frame
7 consecutive days after each appointment

10. Eligibility

Sex
All
Minimum Age & Unit of Time
18 Years
Accepts Healthy Volunteers
Accepts Healthy Volunteers
Eligibility Criteria
Inclusion Criteria: Patients in need of and willing to have a root canal treatment Diagnosis Pulpitis Diagnosis Apical periodontitis. If a patient was referred for more than one tooth just the first treated tooth was included in the study. The teeth had to be restorable and placement of rubber dam must be possible. Exclusion Criteria: patient does not understand Swedish the tooth will be treated with a retrograde approach
Overall Study Officials:
First Name & Middle Initial & Last Name & Degree
Thomas Kvist, phD
Organizational Affiliation
Göteborg University
Official's Role
Study Chair
Facility Information:
Facility Name
Göteborg University
City
Gothenburg
Country
Sweden

12. IPD Sharing Statement

Plan to Share IPD
No
IPD Sharing Plan Description
The data is going to be published at a Group level
Citations:
PubMed Identifier
17496870
Citation
Spencer HR, Ike V, Brennan PA. Review: the use of sodium hypochlorite in endodontics--potential complications and their management. Br Dent J. 2007 May 12;202(9):555-9. doi: 10.1038/bdj.2007.374.
Results Reference
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Citation
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Results Reference
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PubMed Identifier
1298800
Citation
Baumgartner JC, Cuenin PR. Efficacy of several concentrations of sodium hypochlorite for root canal irrigation. J Endod. 1992 Dec;18(12):605-12. doi: 10.1016/S0099-2399(06)81331-2.
Results Reference
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3922900
Citation
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Results Reference
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PubMed Identifier
16911098
Citation
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Results Reference
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PubMed Identifier
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Citation
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Results Reference
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PubMed Identifier
6783724
Citation
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Citation
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Citation
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Citation
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Citation
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Citation
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Citation
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Citation
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Clinical and Microbiological Evaluation of 0.5% Versus 3% Sodium Hypochlorite in Root Canal Treatment

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