Evaluation of the Effectiveness ff Elastic Chains Versus Elastics in Maxillary Canine Retraction: A Randomized Clinical Trial
Phase: NA
Conditions: Elastic Chains, Elastics
Sponsor: Sana'a University

Official Title: Evaluation of the Effectiveness of Elastic Chains versus Elastics in Maxillary Canine 
Retraction: A Randomized Clinical Trial 
 
NCT Number:  
 
Document Date: January, 2024 
 
Study Document Type: [Protocol + Informed Consent Form] 
 
Prepared by: Asraa Haleem Mohamed Tah, MSc Student 
 
Supervised by: 
1. Reema Aqeel Al-Eryani, Assistant professor, Faculty of Dentistry- Sana'a University 
2.  Ghamdan Abdullah Al-Harazi, Professor of Orthodontics, Faculty of Dentistry - Sana'a University 
------------------------------------------------------------ 
 
Note on Registration Timing: 
This study was initiated on 30-1-2024. Initially, I was not aware of the importance of early registration 
on ClinicalTrials.gov. Registration was completed after the study began to ensure transparency and 
adherence to ethical guidelines. All study procedures and protocols have been conducted under the 
supervision of the academic advisor. 
 
 
 
 
 
 
 
 
 
 

Republic of Yemen 
Sana’a University 
Faculty of Dentistry 
Postgraduate Studies and Scientific Research 
Department of Orthodontics Pedodontics and Preventive Dentistry 
Orthodontics Program 
 
 
Consent Form 
 
 I’m ……………………………………………………… agree to participate in this research named 
  
Evaluation of the Effectiveness of Elastic chains Versus Elastics on Maxillary Canine 
Retraction: A Randomized Clinical Trial 
 
I know that I will be one of the volunteers who will be studied. I also know that x-rays and study 
models will be taken prior and after teeth retraction. 
Being a volunteer or refusal to participate in this study will have no effected from any person.  
The risk associated with being volunteer is absent. Data and information I give will be confidential and 
used only for medical research purpose. 
 
I understand that my name will not be used as in any scientific publication and that my privacy will be 
strictly maintained. I may withdraw from this study at any time. 
 
Date:  
Signature of participant: