Canine angulation and rotation during canine retraction using elastomeric chains with and without a power arm
ElSayed, H., Alshazly, R., El Beialy, A., El Sharaby, F. (2021). Canine angulation and rotation during canine retraction using elastomeric chains with and without a power arm. EKB Journal Management System, 67(4), 2933-2937. doi: 10.21608/edj.2021.96357.1790
Hend ElSayed; Reem Alshazly; Amr El Beialy; Fouad El Sharaby. "Canine angulation and rotation during canine retraction using elastomeric chains with and without a power arm". EKB Journal Management System, 67, 4, 2021, 2933-2937. doi: 10.21608/edj.2021.96357.1790
ElSayed, H., Alshazly, R., El Beialy, A., El Sharaby, F. (2021). 'Canine angulation and rotation during canine retraction using elastomeric chains with and without a power arm', EKB Journal Management System, 67(4), pp. 2933-2937. doi: 10.21608/edj.2021.96357.1790
ElSayed, H., Alshazly, R., El Beialy, A., El Sharaby, F. Canine angulation and rotation during canine retraction using elastomeric chains with and without a power arm. EKB Journal Management System, 2021; 67(4): 2933-2937. doi: 10.21608/edj.2021.96357.1790

Canine angulation and rotation during canine retraction using elastomeric chains with and without a power arm

Egyptian Dental Journal
Article 10, Volume 67, Issue 4 - Serial Number 1, October 2021, Page 2933-2937  XML PDF (941.44 K)
Document Type: Original Article
DOI: 10.21608/edj.2021.96357.1790
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Authors
Hend ElSayed email 1; Reem Alshazly2; Amr El Beialy3; Fouad El Sharabyorcid 3
1Associate Professor, Department of Orthodontics & Pediatric Dentistry, Oral and Dental Research Division, National Research Centre, Giza, Egypt & Adjunct Assistant Professor, Department of Epidemiology & Health Promotion, College of Dentistry, NYU.
2Assistant lecturer, Department of Orthodontics and Dentofacial Orthopedics, Faculty of Oral & Dental Medicine, Future University in Egypt, Cairo, Egypt.
3Associate Professor, Department of Orthodontics and Dentofacial Orthopedics, Faculty of Dentistry, Cairo University, Cairo, Egypt.
Abstract
Background: During canine retraction, orthodontic forces are applied away from the tooth’s center of resistance. This introduces canine distal tipping and mesiobuccal rotation. The correction of these unwanted movements will prolong treatment time. Applying the force closer to the center of resistance should decrease this unwanted tooth movement. Objective: Compare the canine angulation and rotation during canine retraction with and without the use of power arm. Materials and Methods: Twenty-four female orthodontic patients (age 19.32± 4.17 years) with dental Class II indicated for bilateral maxillary first premolar extraction and maximum anchorage were included in this study. The canines were retracted with elastomeric chains over 0.016” X 0.022” statinless steel arch wires to reduce friction. The retraction force was 150g. In twelve patients, the canines were retracted using a power arm fixed to the vertical slots of the canine brackets. For the other twelve patients, the elastic chains were attached to the bracket hooks. Results: Before treatment, the canine angulation and rotation was similar for the two groups. The canine angulation was 12.38± 8.27 and 14.5º± 9.41 for the group with the power arm and without, respectively. while canine rotation was 64.74º± 11.65 and 63.12º± 14.88, respectively. Post-retraction, there was no significant difference in the canine angulation or rotation between the groups. Conclusion: Compared to canine retraction with a power arm, conventional canine retraction with elastomeric chains attached to the bracket hook may provide similar control over distal tipping, provided a stiff 0.017” X 0.025” stainless steel arch wire is used.
Keywords
canine retraction; power arm; canine angulation; canine rotation
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