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CTRI Number  CTRI/2025/07/090381 [Registered on: 07/07/2025] Trial Registered Prospectively
Last Modified On: 07/07/2025
Post Graduate Thesis  Yes 
Type of Trial  Interventional 
Type of Study   Dentistry 
Study Design  Other 
Public Title of Study   Clinical and radiographic evaluation of two types of crowns used in milk teeth. 
Scientific Title of Study   Comparative evaluation of clinical and radiographic success of bioflx crowns and stainless steel crowns in primary molars: a split mouth randomized clinical trial. 
Trial Acronym  NIL 
Secondary IDs if Any  
Secondary ID  Identifier 
NIL  NIL 
 
Details of Principal Investigator or overall Trial Coordinator (multi-center study)  
Name  Dr N Sushanth Billava 
Designation  Post graduate student 
Affiliation  Government dental college and research institute, Bangalore 
Address  Room no 5 Department of pedodontics Government dental college and research institute, Victoria campus, Kalasipalya, near city market, Bengaluru

Bangalore
KARNATAKA
560002
India 
Phone  8105530829  
Fax    
Email  billavasushanth9@gmail.com  
 
Details of Contact Person
Scientific Query
 
Name  Dr Mallayya C Hiremath 
Designation  Associate professor 
Affiliation  Government dental college and research institute, Bangalore 
Address  Room no 5 Department of pedodontics Government dental college and research institute, Victoria campus, Kalasipalya, near city market, Bengaluru

Bangalore
KARNATAKA
560002
India 
Phone  9686793102  
Fax    
Email  drmallayyahiremath@gmail.com  
 
Details of Contact Person
Public Query
 
Name  Dr Mallayya C Hiremath 
Designation  Associate professor 
Affiliation  Government dental college and research institute, Bangalore 
Address  Room no 5 Department of pedodontics Government dental college and research institute, Victoria campus, Kalasipalya, near city market, Bengaluru

Bangalore
KARNATAKA
560002
India 
Phone  9686793102  
Fax    
Email  drmallayyahiremath@gmail.com  
 
Source of Monetary or Material Support  
Government dental college and research institute, Bangalore 
 
Primary Sponsor  
Name  Dr N Sushanth Billava 
Address  Government dental college and research institute, Bangalore 
Type of Sponsor  Other [Self] 
 
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 N Sushanth Billava  Government dental college and research institute, Bangalore  Department of pediatric and preventive dentistry, Government dental college and research institute, Bangalore, 560002
Bangalore
KARNATAKA 
8105530829

billavasushanth9@gmail.com 
 
Details of Ethics Committee  
No of Ethics Committees= 1  
Name of Committee  Approval Status 
INSTITUTIONAL ETHICAL COMMITTEE GOVERMENT DENTAL COLLEGE AND RESEARCH INSTITUITE BANGALORE  Approved 
 
Regulatory Clearance Status from DCGI  
Status 
Not Applicable 
 
Health Condition / Problems Studied  
Health Type  Condition 
Healthy Human Volunteers  Systemically healthy co-operative participants in the age group of 6-9 years who have received pulp therapy or with multi surface carious lesions of primary molars, bilaterally. 
 
Intervention / Comparator Agent  
Type  Name  Details 
Intervention  Bioflx crown on primary molars treated with pulp therapy or with multi-surface carious lesions   1 year 6 months 
Comparator Agent  stainless steel crown on primary molars treated with pulp therapy or with multi-surface carious lesions   1 year 6 months 
 
Inclusion Criteria  
Age From  6.00 Year(s)
Age To  9.00 Year(s)
Gender  Both 
Details  1)Systemically healthy, co–operative participants (Frankl’s positive and definitely positive) aged 6 to 9 years with primary molars treated with pulp therapy (IPC, Pulpotomy, Pulpectomy) or with multi-surface carious lesions bilaterally.

2)Restorable primary molars functioning in occlusion with an opposing tooth, and possessing at least one contact area with an adjacent tooth 
 
ExclusionCriteria 
Details  1)Inappropriately obturated primary molars.

2)Tooth with internal resorption or tooth with more than one third of root resorption.

3)Patients with very poor oral hygiene and DMFT or dmft score greater than 5.

4)Patients with known allergy to local anesthesia, chromium, nickel and resin material.

5)Patients with bruxism and other parafunctional habits. 
 
Method of Generating Random Sequence   Random Number Table 
Method of Concealment   Other 
Blinding/Masking   Not Applicable 
Primary Outcome  
Outcome  TimePoints 
Percentage of clinical success and radiographic success of Bioflx crowns and stainless steel crowns.
 
12 months. 
 
Secondary Outcome  
Outcome  TimePoints 
Plaque scores and gingival health around the Bioflx crowns and stainless steel
crowns.  
12 months. 
Patient and parental satisfaction with Bioflx crowns and Stainless steel crowns.  12 months. 
 
Target Sample Size   Total Sample Size="60"
Sample Size from India="60" 
Final Enrollment numbers achieved (Total)= "Applicable only for Completed/Terminated trials"
Final Enrollment numbers achieved (India)="Applicable only for Completed/Terminated trials" 
Phase of Trial   Post Marketing Surveillance 
Date of First Enrollment (India)   25/07/2025 
Date of Study Completion (India) Applicable only for Completed/Terminated trials 
Date of First Enrollment (Global)  25/07/2025 
Date of Study Completion (Global) Applicable only for Completed/Terminated trials 
Estimated Duration of Trial   Years="1"
Months="6"
Days="0" 
Recruitment Status of Trial (Global)   Not Applicable 
Recruitment Status of Trial (India)  Not Yet Recruiting 
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   NEED FOR STUDY
 Dental caries in children is a serious public health issue. It is now equally important to do different restorative procedures on the deciduous dentition in order to preserve their function and aesthetics. Due to rising awareness aesthetics is becoming more and more important in pediatric dentistry these days. There is a driving demand for quick, minimally invasive, and aesthetic restorations in pediatric dentistry. For full coverage restorations, stainless steel crowns continue to be the gold standard even after being introduced decades back. Their strength, retention, and conservative tooth preparation are the benefits, however their primary drawback being unesthetic. Zirconia crowns are thought to be the most aesthetically pleasing choice for treating primary molars. These crowns have a high level of polish and are tooth-coloured. The drawbacks of these crowns are their high cost, considerable dental preparation, and inability to be altered and they abrade the opposing tooth. The first flexible, long- lasting, and aesthetically pleasing prefabricated crown for primary molars is the Bioflx Crown, which is manufactured by Kids-e-Dental since 2021. The medical device industry uses Bioflx materials. Bioflx crowns are tooth coloured, monochromatic, metal-free, and composed of a high-strength resin polymer that is highly durable, flexible, and strong. These crowns can be autoclaved and tooth preparation is similar to stainless steel crowns. Thus, there is a need to assess clinically the gingival health and oral hygiene condition of teeth restored with Bioflx crowns and stainless steel crowns. Keeping in mind the paucity of studies, this study aims to evaluate the clinical and radiographic success and patient/parental satisfaction with Bioflx crowns in comparison to stainless steel crowns in primary molars.
 
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