Removal Torque Analyses of Two Self-drilling Orthodontic Temporary Anchorage Devices (TADs)
Journal Title: Dental Research and Management - Year 2019, Vol 3, Issue 2
Abstract
Stability of miniscrews or Temporary Anchorage Devices (TADs) is an essential factor for successful application in orthodontics. Miniscrews removal torque can be used as an indicator of miniscrews stability. The objective of this work was to compare removal torque between self-drilling tapered mini-screws and cylindrical miniscrews. Materials and Methods: Two groups of TADs were inserted in the maxillae of orthodontic patients to provide stationary anchorage for front teeth retraction. Group 1: 20 tapered self-drilling miniscrews, Group 2: 20 cylindrical self-drilling miniscrew. Split mouth technique was used. All of the TADs were inserted parallel to the occlusal plane, between roots of the 2nd maxillary premolar and 1st maxillary molar. The TADs were immediately loaded with constant and continuous load using 8 mm long heavy short Nickel Titanium coil spring. The coil spring was stretched between the heads of the two types of TADs and crimpable hooks that fixed on arch wire just distal to the anterior six maxillary teeth. After complete retraction of the anterior maxillary teeth, TADs were removed using torque adjustable screw-removal. At the moment of movement of the TAD the torque was recorded in Newton Centimeter (Ncm). Results: Mann Whitney U Test resulted in a significant difference between the two groups, indicating that cylindrical TADs had significantly higher removal torque than tapered TADs (means were 3.20 Ncm ± 0.20 and 2.70 Ncm ± 0.10 respectively). Conclusion: Physical properties have a considerable influence on the stability of the TADs. Cylindrical TADs are showed more mechanical interlock into the bone.
Authors and Affiliations
Mahfud F Mohamed
Keywords
Related Articles
- EP ID EP664432
- DOI 10.33805/2572-6978.130
- Views 165
- Downloads 0
The Effect of the Scanning Number on Accuracy of Digital Impression
Background: Intraoral digital scanning could offer a win-win clinical pathway for both doctor and patient, but many factors can affect its accuracy. This study was designed to investigate the effect of the scanning numbe...
Dental Treatment of Autistic Patients
Autism is a developmental disorder characterized by difficulties in social and communication interactions. Parentally induced autism, brain injury/anomalies, constitutional vulnerability, and developmental aphasia have b...
The Effect of Water Fluoride Concentration on DMFT Index in Vardar Population in Macedonia
The aim of this study is to determine the correlation between the DMFT index of 12-year-old children and the concentration of fluorine in drinking water from the populated areas where children live. Material and method:...
Selective Killing Natural Products and Drugs in Oral Cancer Treatments
Most cancer drugs are effective to kill cancer cells but also harm normal cells. Drugs and natural products with the selective killing effect may be helpful to solve this problem. The side effects of many an...
Recent Trend from the Clinical Point of View for Periodontitis and Diabetes Mellitus
Diabetes has been recognized as a risk factor for periodontitis for long. The risk of periodontitis has been increased 2-3 times in diabetic patients in poor control than individuals without. Periodontitis may influence...