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CTRI Number  CTRI/2025/03/081928 [Registered on: 07/03/2025] Trial Registered Prospectively
Last Modified On: 06/03/2025
Post Graduate Thesis  No 
Type of Trial  Interventional 
Type of Study   Drug
Surgical/Anesthesia
Dentistry 
Study Design  Randomized, Parallel Group, Multiple Arm Trial 
Public Title of Study   A clinical trial to evaluate the effect of magnesium sulfate with local anaesthetic injection for tooth pain during and after root canal treatment 
Scientific Title of Study   Analgesic efficacy of 2% Lignocaine and 4% Articaine with or without Magnesium Sulfate for inferior alveolar nerve block in irreversible pulpitis and apical periodontitis -A Randomized Clinical trail 
Trial Acronym  LAMS 
Secondary IDs if Any  
Secondary ID  Identifier 
NIL  NIL 
 
Details of Principal Investigator or overall Trial Coordinator (multi-center study)  
Name  Manishaa Jayachandran 
Designation  Post graduate student 
Affiliation  Chettinad Dental College and Research Institute 
Address  Chettinad Dental College and Research Institute Rajiv Gandhi Salai, Kelambakkam

Kancheepuram
TAMIL NADU
603103
India 
Phone  47411000  
Fax    
Email  manishaa0911@gmail.com  
 
Details of Contact Person
Scientific Query
 
Name  Dr C Charanya 
Designation  Reader 
Affiliation  Chettinad Dental College and Research Institute 
Address  Chettinad Dental College and Research Institute Rajiv Gandhi Salai, Kelambakkam

Kancheepuram
TAMIL NADU
603103
India 
Phone  47411000  
Fax    
Email  charanya1711@gmail.com  
 
Details of Contact Person
Public Query
 
Name  Dr. Sadasiva K 
Designation  Professor and Head 
Affiliation  Chettinad Dental College and Research Institute 
Address  Chettinad Dental College and Research Institute Rajiv Gandhi Salai, Kelambakkam


TAMIL NADU
603103
India 
Phone  47411000  
Fax    
Email  drsadasiva@yahoo.co.in  
 
Source of Monetary or Material Support  
Chettinad Dental College and Research Institute Rajiv Gandhi Salai, Kelambakkam 
 
Primary Sponsor  
Name  Chettinad Dental College and Research Institute 
Address  Chettinad Dental College and Research Institute Rajiv Gandhi Salai, Kelambakkam 
Type of Sponsor  Research institution and hospital 
 
Details of Secondary Sponsor  
Name  Address 
NIL  NIL 
 
Countries of Recruitment     India  
Sites of Study  
No of Sites = 1  
Name of Principal Investigator  Name of Site  Site Address  Phone/Fax/Email 
Dr C Charanya  Chettinad dental college and research institute   Department of conservative dentistry and endodontics, room no 10, 4th floor, E Block, Chettinad dental college and research institute, Rajiv Gandhi Salai, Kelambakkam
Kancheepuram
TAMIL NADU 
9791146861

charanya1711@gmail.com 
 
Details of Ethics Committee  
No of Ethics Committees= 1  
Name of Committee  Approval Status 
Chettinad Dental College and Research Institute  Approved 
 
Regulatory Clearance Status from DCGI  
Status 
Not Applicable 
 
Health Condition / Problems Studied  
Health Type  Condition 
Healthy Human Volunteers  ASA category I, II 
 
Intervention / Comparator Agent  
Type  Name  Details 
Comparator Agent  2% lidocaine with 1:80,000 epinephrine and 4% articaine with 1:1,00,000 epinephrine and 75 mg magnesium sulfate  Pre-operative vitals and Heft Parker–Visual Analogue Scale (HP-VAS) pain scores will be recorded before starting the procedure. Page 2 of 11 The patients are (Block randomization) randomly divided into four groups,each group containing 11 patients Group 1- 2% lidocaine with 1:80,000 epinephrine Group 2- 2% lidocaine with epinephrine 1:80,000 and 75 mg MgSo4 Group 3 -4% articaine with epinephrine 1:1,00,000 and 75mg MgSo4 Group 4-4% articaine with epinephrine 1:1,00,000 The onset of anaesthesia will be evaluated by EPT for every 1 min until the corresponding vital tooth stops responding. Lip numbness will be considered to check the aesthetic success within 15 minutes.The duration of anaesthesia will be evaluated every 15 min using EPT till the adjacent normal tooth responded on the working side. In case of pain supplementary injection will be provided and the patient will be ruled out the study. Pain data will be collected after access cavity and insertion of files in the canals. The post-operative analgesia will be examined at intervals of 6, 12, 24, and 48 h. 
Intervention  2% lidocaine with 1:80,000 epinephrine and 4% articaine with 1:1,00,000 epinephrine and 75 mg magnesium sulfate  Pre-operative vitals and Heft Parker–Visual Analogue Scale (HP-VAS) pain scores will be recorded before starting the procedure. Page 2 of 11 The patients are (Block randomization) randomly divided into four groups,each group containing 11 patients Group 1- 2% lidocaine with 1:80,000 epinephrine Group 2- 2% lidocaine with epinephrine 1:80,000 and 75 mg MgSo4 Group 3 -4% articaine with epinephrine 1:1,00,000 and 75mg MgSo4 Group 4-4% articaine with epinephrine 1:1,00,000 The onset of anaesthesia will be evaluated by EPT for every 1 min until the corresponding vital tooth stops responding. Lip numbness will be considered to check the aesthetic success within 15 minutes.The duration of anaesthesia will be evaluated every 15 min using EPT till the adjacent normal tooth responded on the working side. In case of pain supplementary injection will be provided and the patient will be ruled out the study. Pain data will be collected after access cavity and insertion of files in the canals. The post-operative analgesia will be examined at intervals of 6, 12, 24, and 48 h. 
 
Inclusion Criteria  
Age From  20.00 Year(s)
Age To  60.00 Year(s)
Gender  Both 
Details  Patients those who will be diagnosed with
symptomatic irreversible pulpitis and symptomatic
apical periodontitis of mandibular molar teeth were
included into the study.
ASA category I, II
Patient age group – 20-60 
 
ExclusionCriteria 
Details  Exclusion criteria included ASA category III and
above, patients with any prior medications, those
allergic to LA, pregnant, and lactating women 
 
Method of Generating Random Sequence   Stratified block randomization 
Method of Concealment   Sequentially numbered, sealed, opaque envelopes 
Blinding/Masking   Participant Blinded 
Primary Outcome  
Outcome  TimePoints 
anesthetic and post operative analgesic efficacy expected with addition of magnesium sulfate   anesthetic and post operative analgesic efficacy expected with addition of magnesium sulfate. The onset of anaesthesia will be evaluated by EPT for every 1 min until the
corresponding vital tooth stops responding. Lip numbness will be considered to
check the aesthetic success within 15 minutes.The duration of anaesthesia will be
evaluated every 15 min using EPT till the adjacent normal tooth responded on the
working side. 
 
Secondary Outcome  
Outcome  TimePoints 
post operative analgesic efficacy expected with addition of magnesium sulfate   anesthetic efficacy expected with addition of magnesium sulfate. Pain data will be collected after access cavity and insertion of files in the canals.
The post-operative analgesia will be examined at intervals of 6, 12, 24, and 48 h. 
 
Target Sample Size   Total Sample Size="44"
Sample Size from India="44" 
Final Enrollment numbers achieved (Total)= "45"
Final Enrollment numbers achieved (India)="45" 
Phase of Trial   Phase 3/ Phase 4 
Date of First Enrollment (India)   01/04/2025 
Date of Study Completion (India) 25/07/2025 
Date of First Enrollment (Global)  Date Missing 
Date of Study Completion (Global) Date Missing 
Estimated Duration of Trial   Years="0"
Months="3"
Days="0" 
Recruitment Status of Trial (Global)   Not Applicable 
Recruitment Status of Trial (India)  Completed 
Publication Details   N/A 
Individual Participant Data (IPD) Sharing Statement

Will individual participant data (IPD) be shared publicly (including data dictionaries)?  

Response - NO
Brief Summary  

AIM: To evaluate the onset, duration, anesthetic efficacy and post operative

analgesia of 2% Lignocaine and 4% Articaine with or without Magnesium Sulfate

for inferior alveolar nerve block in irreversible pulpitis and apical periodontitis.

METHODOLOGY :Patients classified under the American Society of

Anaesthesiologists (ASA) categories I and II, within the age groups of 20 to 60

years will be screened in the study. 44 patients diagnosed with symptomatic

irreversible pulpitis and apical periodontitis were selected

Study protocol will be explained to the patients and informed consent will be

obtained from those willing to participate. The patients are free to withdraw

anytime during the study. Pre-operative vitals and Heft Parker–Visual Analogue

Scale (HP-VAS) pain scores will be recorded before starting the procedure.Page 2 of 11

The patients are (Block randomization) randomly divided into four groups,each

group containing 11 patients

Group 1- 2% lidocaine with 1:80,000 epinephrine

Group 2- 2% lidocaine with epinephrine 1:80,000 and 75 mg MgSo4

Group 3 -4% articaine with epinephrine 1:1,00,000 and 75mg MgSo4

Group 4-4% articaine with epinephrine 1:1,00,000

The onset of anaesthesia will be evaluated by EPT for every 1 min until the

corresponding vital tooth stops responding. Lip numbness will be considered to

check the aesthetic success within 15 minutes.The duration of anaesthesia will be

evaluated every 15 min using EPT till the adjacent normal tooth responded on the

working side.

In case of pain supplementary injection will be provided and the patient will be

ruled out the study.

Pain data will be collected after access cavity and insertion of files in the canals.

The post-operative analgesia will be examined at intervals of 6, 12, 24, and 48 h.

STATISTICAL ANALYSIS

Statistical analysis will be done by IBM SPSS (IBM Corp. Released 2011. IBM

SPSS Statistics for Windows, Version 20.0. Armonk, NY: IBM Corp). Mean and

SD will be used to summarize the data. A ‘P’ value of <0.05 will be considered as

statistically significant difference.

 
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