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CTRI Number  CTRI/2024/01/061487 [Registered on: 15/01/2024] Trial Registered Prospectively
Last Modified On: 16/06/2026
Post Graduate Thesis  Yes 
Type of Trial  Interventional 
Type of Study   Dentistry 
Study Design  Non-randomized, Active Controlled Trial 
Public Title of Study   To compare number of oral bacterial colonies and salivary pH in patients treated with removable orthodontic appliance to correct lower jaw deficiency 
Scientific Title of Study   Comparison and evaluation of oral streptococcus mutans count and salivary pH in patients treated with removable twin block appliance - an in vivo study 
Trial Acronym  NIL 
Secondary IDs if Any  
Secondary ID  Identifier 
NIL  NIL 
 
Details of Principal Investigator or overall Trial Coordinator (multi-center study)  
Name  Chirag Goel 
Designation  MDS III YEAR 
Affiliation  Bapuji Dental College and Hospital 
Address  Department of Orthodontics, Bapuji Dental College and Hospital, MCC B Block, Davangere, Karnataka

Davanagere
KARNATAKA
577004
India 
Phone  8130789875  
Fax    
Email  chiraggoel29@gmail.com  
 
Details of Contact Person
Scientific Query
 
Name  Dr Kiran Kumar H C 
Designation  Head of Department and Professor 
Affiliation  Bapuji Dental College and Hospital 
Address  Department of Orthodontics, Bapuji Dental College and Hospital, MCC B Block, Davangere, Karnataka

Davanagere
KARNATAKA
577004
India 
Phone  9886040122  
Fax    
Email  kiranortho77@gmail.com  
 
Details of Contact Person
Public Query
 
Name  Chirag Goel 
Designation  MDS III YEAR 
Affiliation  Bapuji Dental College and Hospital 
Address  Department of Orthodontics, Bapuji Dental College and Hospital, MCC B Block, Davangere, Karnataka

Davanagere
KARNATAKA
577004
India 
Phone  8130789875  
Fax    
Email  chiraggoel29@gmail.com  
 
Source of Monetary or Material Support  
Department of Orthodontics and Department of Oral pathology, Bapuji Dental College and Hospital, MCC B Block Davangere, Karnataka, 577004 
 
Primary Sponsor
Modification(s)  
Name  Chirag Goel 
Address  Department of Orthodontics, Bapuji Dental College and Hospital, MCC B Block, Davangere, Karnataka 
Type of Sponsor  Private medical college 
 
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 Chirag Goel  Bapuji Dental College and Hospital  Room no. 4, Department of Orthodontics and Dentofacial Orthopaedics
Davanagere
KARNATAKA 
8130789875

chiraggoel29@gmail.com 
 
Details of Ethics Committee  
No of Ethics Committees= 1  
Name of Committee  Approval Status 
Institutional Review Board, Bapuji Dental College and Hospital  Approved 
 
Regulatory Clearance Status from DCGI  
Status 
Not Applicable 
 
Health Condition / Problems Studied  
Health Type  Condition 
Patients  (1) ICD-10 Condition: K088||Other specified disorders of teethand supporting structures,  
 
Intervention / Comparator Agent  
Type  Name  Details 
Comparator Agent  Class I malocclusion  volunteers who do not require any immediate line of treatment from any functional or fixed type of orthodontic mechanotherapy having angles class I type of malocclusion 
Intervention  Removable twin block  it is a type of functional appliance used to bring growth modulation of mandible in Angles class II malocclusion with retruded mandible cases by posturing the mandible forward. 
 
Inclusion Criteria  
Age From  10.00 Year(s)
Age To  15.00 Year(s)
Gender  Both 
Details  Patients who are prescribed functional orthodontic therapy using removable twin block
appliance.
Fewer than 5 decayed, missing, or filled teeth. 
 
ExclusionCriteria 
Details  Patients treated with fixed orthodontics
Patients having any systemic disease.
Patients on any antimicrobial therapy in the past 3 months 
 
Method of Generating Random Sequence   Not Applicable 
Method of Concealment   Not Applicable 
Blinding/Masking   Open Label 
Primary Outcome  
Outcome  TimePoints 
salivary streptococcus mutans colony count  At the delivery of appliance, one month and 6 months after the delivery of appliance. 
 
Secondary Outcome  
Outcome  TimePoints 
salivary ph  at the delivery of appliance, one month & 6 months after the delivery of appliance. 
 
Target Sample Size   Total Sample Size="30"
Sample Size from India="30" 
Final Enrollment numbers achieved (Total)= "30"
Final Enrollment numbers achieved (India)="30" 
Phase of Trial   Phase 2 
Date of First Enrollment (India)   20/01/2024 
Date of Study Completion (India) 15/01/2024 
Date of First Enrollment (Global)  Date Missing 
Date of Study Completion (Global) Date Missing 
Estimated Duration of Trial   Years="0"
Months="6"
Days="15" 
Recruitment Status of Trial (Global)   Not Applicable 
Recruitment Status of Trial (India)  Completed 
Publication Details
Modification(s)  
Under Process 
Individual Participant Data (IPD) Sharing Statement

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

Response - NO
Brief Summary
Modification(s)  

ABSTRACT

BACKGROUND AND OBJECTIVES:

Oral microbiome is a diverse ecosystem of various microorganisms, and orthodontic treatment can make its maintenance challenging. Streptococcus mutans being a primary bacterium responsible for caries, during orthodontic treatment its count can increase upto 5 folds. Twin block appliance consists of simple maxillary and mandibular bite blocks which interlock at 70 degrees angle to provide correction of skeletal Class II malocclusions with mandibular retrognathism.

The objective of this study was to evaluate the change in the oral Streptococcus mutans colony count after the initiation of orthopedic treatment using removable twin block appliance in the mixed dentition phase and correlate it with the salivary pH.

METHOD:

In this study, unstimulated saliva was collected following the delivery of orthopedic appliance, 1 month and 6 months after the delivery of removable twin block appliance and salivary pH was measured. Streptococcus mutans colonies were cultured and counted. Inter-group comparison was done using Mann-Whitney U test and Chi-square test and Intra-group comparison was done using Friedmans ANOVA. Pearson’s correlation was used to identify correlation between bacterial colonies and salivary pH. The significance level is set at P < 0.05.

RESULTS:

The findings showed statistically significant increase in the number of Streptococcus mutans colonies from T0-T1, T1-T6 and salivary pH from T0-T1, T1-T6 in removable twin block group. There was no statistically significant increase present in the number of Streptococcus mutans colonies and salivary pH in the control group. The results also showed a positive correlation between Streptococcus mutans and salivary pH only at T0 for removable twin block group and at T6 for control group.

CONCLUSION:

The study concludes that there is an increase in the colony count in oral cavity after a removable twin block is delivered in patients to correct skeletal malocclusions but is statistically not significant when compared to untreated controls.

KEY WORDS:

Streptococcus mutans, Class II, Removable Twin Block, Salivary pH, In-Vivo study.


 
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